diff --git a/src/addon/calendar/calendar.module.ts b/src/addon/calendar/calendar.module.ts
index b36d0bf0c..a0feb1722 100644
--- a/src/addon/calendar/calendar.module.ts
+++ b/src/addon/calendar/calendar.module.ts
@@ -46,7 +46,7 @@ export class AddonCalendarModule {
         localNotificationsProvider.registerClick(AddonCalendarProvider.COMPONENT, (data) => {
             if (data.eventid) {
                 initDelegate.ready().then(() => {
-                    calendarProvider.isDisabled(data.siteId).then(function(disabled) {
+                    calendarProvider.isDisabled(data.siteId).then((disabled) => {
                         if (disabled) {
                             // The calendar is disabled in the site, don't open it.
                             return;
diff --git a/src/addon/calendar/pages/event/event.ts b/src/addon/calendar/pages/event/event.ts
index 2778df277..4bce81ca5 100644
--- a/src/addon/calendar/pages/event/event.ts
+++ b/src/addon/calendar/pages/event/event.ts
@@ -45,10 +45,10 @@ export class AddonCalendarEventPage {
     courseName: string;
     notificationsEnabled = false;
 
-    constructor(private translate: TranslateService, private calendarProvider: AddonCalendarProvider, private navParams: NavParams,
+    constructor(private translate: TranslateService, private calendarProvider: AddonCalendarProvider, navParams: NavParams,
             private domUtils: CoreDomUtilsProvider, private coursesProvider: CoreCoursesProvider,
-            private calendarHelper: AddonCalendarHelperProvider, private sitesProvider: CoreSitesProvider,
-            private localNotificationsProvider: CoreLocalNotificationsProvider, private courseProvider: CoreCourseProvider) {
+            private calendarHelper: AddonCalendarHelperProvider, sitesProvider: CoreSitesProvider,
+            localNotificationsProvider: CoreLocalNotificationsProvider, private courseProvider: CoreCourseProvider) {
 
         this.eventId = navParams.get('id');
         this.notificationsEnabled = localNotificationsProvider.isAvailable();
diff --git a/src/addon/calendar/pages/list/list.ts b/src/addon/calendar/pages/list/list.ts
index 5e6a2fbd1..fb567453c 100644
--- a/src/addon/calendar/pages/list/list.ts
+++ b/src/addon/calendar/pages/list/list.ts
@@ -63,11 +63,11 @@ export class AddonCalendarListPage implements OnDestroy {
         course: this.allCourses
     };
 
-    constructor(private translate: TranslateService, private calendarProvider: AddonCalendarProvider, private navParams: NavParams,
+    constructor(private translate: TranslateService, private calendarProvider: AddonCalendarProvider, navParams: NavParams,
             private domUtils: CoreDomUtilsProvider, private coursesProvider: CoreCoursesProvider, private utils: CoreUtilsProvider,
-            private calendarHelper: AddonCalendarHelperProvider, private sitesProvider: CoreSitesProvider,
-            private localNotificationsProvider: CoreLocalNotificationsProvider, private popoverCtrl: PopoverController,
-            private eventsProvider: CoreEventsProvider, private navCtrl: NavController, private appProvider: CoreAppProvider) {
+            private calendarHelper: AddonCalendarHelperProvider, sitesProvider: CoreSitesProvider,
+            localNotificationsProvider: CoreLocalNotificationsProvider, private popoverCtrl: PopoverController,
+            eventsProvider: CoreEventsProvider, private navCtrl: NavController, appProvider: CoreAppProvider) {
 
         this.siteHomeId = sitesProvider.getCurrentSite().getSiteHomeId();
         this.notificationsEnabled = localNotificationsProvider.isAvailable();
diff --git a/src/addon/calendar/providers/helper.ts b/src/addon/calendar/providers/helper.ts
index c0b578986..e0e08da98 100644
--- a/src/addon/calendar/providers/helper.ts
+++ b/src/addon/calendar/providers/helper.ts
@@ -14,7 +14,6 @@
 
 import { Injectable } from '@angular/core';
 import { CoreLoggerProvider } from '../../../providers/logger';
-import { CoreSitesProvider } from '../../../providers/sites';
 import { CoreCourseProvider } from '../../../core/course/providers/course';
 
 /**
@@ -32,7 +31,7 @@ export class AddonCalendarHelperProvider {
         'category': 'albums'
     };
 
-    constructor(logger: CoreLoggerProvider, private sitesProvider: CoreSitesProvider, private courseProvider: CoreCourseProvider) {
+    constructor(logger: CoreLoggerProvider, private courseProvider: CoreCourseProvider) {
         this.logger = logger.getInstance('AddonCalendarHelperProvider');
     }
 
diff --git a/src/addon/userprofilefield/checkbox/component/checkbox.ts b/src/addon/userprofilefield/checkbox/component/checkbox.ts
index b909bfac7..f04dabb92 100644
--- a/src/addon/userprofilefield/checkbox/component/checkbox.ts
+++ b/src/addon/userprofilefield/checkbox/component/checkbox.ts
@@ -14,6 +14,7 @@
 
 import { Component, Input, OnInit } from '@angular/core';
 import { FormGroup, FormBuilder, Validators } from '@angular/forms';
+import { CoreUtilsProvider } from '../../../../providers/utils/utils';
 
 /**
  * Directive to render a checkbox user profile field.
@@ -28,7 +29,7 @@ export class AddonUserProfileFieldCheckboxComponent implements OnInit {
     @Input() disabled?: boolean = false; // True if disabled. Defaults to false.
     @Input() form?: FormGroup; // Form where to add the form control.
 
-    constructor(private fb: FormBuilder) {}
+    constructor(private fb: FormBuilder, protected utils: CoreUtilsProvider) {}
 
     /**
      * Component being initialized.
@@ -41,10 +42,11 @@ export class AddonUserProfileFieldCheckboxComponent implements OnInit {
 
             // Initialize the value.
             let formData = {
-                value: field.defaultdata && field.defaultdata !== '0' && field.defaultdata !== 'false',
+                value: this.utils.isTrueOrOne(field.defaultdata),
                 disabled: this.disabled
             };
-            this.form.addControl(field.modelName, this.fb.control(formData, field.required && !field.locked ? Validators.requiredTrue : null));
+            this.form.addControl(field.modelName, this.fb.control(formData,
+                field.required && !field.locked ? Validators.requiredTrue : null));
         }
     }
 
diff --git a/src/addon/userprofilefield/checkbox/providers/handler.ts b/src/addon/userprofilefield/checkbox/providers/handler.ts
index ee5147f99..d6547bf96 100644
--- a/src/addon/userprofilefield/checkbox/providers/handler.ts
+++ b/src/addon/userprofilefield/checkbox/providers/handler.ts
@@ -13,7 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 import { Injectable } from '@angular/core';
-import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from '../../../../core/user/providers/user-profile-field-delegate';
+import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from
+    '../../../../core/user/providers/user-profile-field-delegate';
 import { AddonUserProfileFieldCheckboxComponent } from '../component/checkbox';
 
 /**
diff --git a/src/addon/userprofilefield/datetime/component/datetime.ts b/src/addon/userprofilefield/datetime/component/datetime.ts
index 737b6bed7..b7408eb1b 100644
--- a/src/addon/userprofilefield/datetime/component/datetime.ts
+++ b/src/addon/userprofilefield/datetime/component/datetime.ts
@@ -15,6 +15,7 @@
 import { Component, Input, OnInit } from '@angular/core';
 import { FormGroup, FormBuilder, Validators } from '@angular/forms';
 import { CoreTimeUtilsProvider } from '../../../../providers/utils/time';
+import { CoreUtilsProvider } from '../../../../providers/utils/utils';
 
 /**
  * Directive to render a datetime user profile field.
@@ -29,7 +30,7 @@ export class AddonUserProfileFieldDatetimeComponent implements OnInit {
     @Input() disabled?: boolean = false; // True if disabled. Defaults to false.
     @Input() form?: FormGroup; // Form where to add the form control.
 
-    constructor(private fb: FormBuilder, private timeUtils: CoreTimeUtilsProvider) {}
+    constructor(private fb: FormBuilder, private timeUtils: CoreTimeUtilsProvider, protected utils: CoreUtilsProvider) {}
 
     /**
      * Component being initialized.
@@ -41,7 +42,7 @@ export class AddonUserProfileFieldDatetimeComponent implements OnInit {
             field.modelName = 'profile_field_' + field.shortname;
 
             // Check if it's only date or it has time too.
-            let hasTime = field.param3 && field.param3 !== '0' && field.param3 !== 'false';
+            let hasTime = this.utils.isTrueOrOne(field.param3);
             field.format = hasTime ? this.timeUtils.getLocalizedDateFormat('LLL') : this.timeUtils.getLocalizedDateFormat('LL');
 
             // Check min value.
@@ -64,7 +65,8 @@ export class AddonUserProfileFieldDatetimeComponent implements OnInit {
                 value: field.defaultdata,
                 disabled: this.disabled
             };
-            this.form.addControl(field.modelName, this.fb.control(formData, field.required && !field.locked ? Validators.required : null));
+            this.form.addControl(field.modelName, this.fb.control(formData,
+                field.required && !field.locked ? Validators.required : null));
         }
     }
 
diff --git a/src/addon/userprofilefield/datetime/providers/handler.ts b/src/addon/userprofilefield/datetime/providers/handler.ts
index 16e1f7048..34f65bb25 100644
--- a/src/addon/userprofilefield/datetime/providers/handler.ts
+++ b/src/addon/userprofilefield/datetime/providers/handler.ts
@@ -13,9 +13,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 import { Injectable } from '@angular/core';
-import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from '../../../../core/user/providers/user-profile-field-delegate';
+import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from
+    '../../../../core/user/providers/user-profile-field-delegate';
 import { AddonUserProfileFieldDatetimeComponent } from '../component/datetime';
-import { Platform } from 'ionic-angular';
 
 /**
  * Datetime user profile field handlers.
@@ -24,7 +24,7 @@ import { Platform } from 'ionic-angular';
 export class AddonUserProfileFieldDatetimeHandler implements CoreUserProfileFieldHandler {
     name = 'datetime';
 
-    constructor(private platform: Platform) {}
+    constructor() {}
 
     /**
      * Whether or not the handler is enabled on a site level.
diff --git a/src/addon/userprofilefield/menu/component/menu.ts b/src/addon/userprofilefield/menu/component/menu.ts
index a7048af52..09c44f1f5 100644
--- a/src/addon/userprofilefield/menu/component/menu.ts
+++ b/src/addon/userprofilefield/menu/component/menu.ts
@@ -51,7 +51,8 @@ export class AddonUserProfileFieldMenuComponent implements OnInit {
                 disabled: this.disabled
             };
             // Initialize the value using default data.
-            this.form.addControl(field.modelName, this.fb.control(formData, field.required && !field.locked ? Validators.required : null));
+            this.form.addControl(field.modelName, this.fb.control(formData,
+                field.required && !field.locked ? Validators.required : null));
         }
 
     }
diff --git a/src/addon/userprofilefield/menu/providers/handler.ts b/src/addon/userprofilefield/menu/providers/handler.ts
index 7a04a2b61..9004df1fc 100644
--- a/src/addon/userprofilefield/menu/providers/handler.ts
+++ b/src/addon/userprofilefield/menu/providers/handler.ts
@@ -13,7 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 import { Injectable } from '@angular/core';
-import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from '../../../../core/user/providers/user-profile-field-delegate';
+import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from
+    '../../../../core/user/providers/user-profile-field-delegate';
 import { AddonUserProfileFieldMenuComponent } from '../component/menu';
 
 /**
diff --git a/src/addon/userprofilefield/text/component/text.ts b/src/addon/userprofilefield/text/component/text.ts
index 3efb230e5..8ef5e8f2c 100644
--- a/src/addon/userprofilefield/text/component/text.ts
+++ b/src/addon/userprofilefield/text/component/text.ts
@@ -14,6 +14,7 @@
 
 import { Component, Input, OnInit } from '@angular/core';
 import { FormGroup, FormBuilder, Validators } from '@angular/forms';
+import { CoreUtilsProvider } from '../../../../providers/utils/utils';
 
 /**
  * Directive to render a text user profile field.
@@ -28,7 +29,7 @@ export class AddonUserProfileFieldTextComponent implements OnInit {
     @Input() disabled?: boolean = false; // True if disabled. Defaults to false.
     @Input() form?: FormGroup; // Form where to add the form control.
 
-    constructor(private fb: FormBuilder) {}
+    constructor(private fb: FormBuilder, protected utils: CoreUtilsProvider) {}
 
     /**
      * Component being initialized.
@@ -45,14 +46,15 @@ export class AddonUserProfileFieldTextComponent implements OnInit {
             }
 
             // Check if it's a password or text.
-            field.inputType = field.param3 && field.param3 !== '0' && field.param3 !== 'false' ? 'password' : 'text';
+            field.inputType = this.utils.isTrueOrOne(field.param3) ? 'password' : 'text';
 
             let formData = {
                 value: field.defaultdata,
                 disabled: this.disabled
             };
             // Initialize the value using default data.
-            this.form.addControl(field.modelName, this.fb.control(formData, field.required && !field.locked ? Validators.required : null));
+            this.form.addControl(field.modelName, this.fb.control(formData,
+                field.required && !field.locked ? Validators.required : null));
         }
     }
 
diff --git a/src/addon/userprofilefield/text/providers/handler.ts b/src/addon/userprofilefield/text/providers/handler.ts
index cd6754e70..b3778b173 100644
--- a/src/addon/userprofilefield/text/providers/handler.ts
+++ b/src/addon/userprofilefield/text/providers/handler.ts
@@ -13,7 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 import { Injectable } from '@angular/core';
-import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from '../../../../core/user/providers/user-profile-field-delegate';
+import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from
+    '../../../../core/user/providers/user-profile-field-delegate';
 import { AddonUserProfileFieldTextComponent } from '../component/text';
 import { CoreTextUtilsProvider } from '../../../../providers/utils/text';
 
diff --git a/src/addon/userprofilefield/textarea/component/textarea.ts b/src/addon/userprofilefield/textarea/component/textarea.ts
index dbcf50dfc..927dd128e 100644
--- a/src/addon/userprofilefield/textarea/component/textarea.ts
+++ b/src/addon/userprofilefield/textarea/component/textarea.ts
@@ -40,15 +40,15 @@ export class AddonUserProfileFieldTextareaComponent implements OnInit {
 
         if (field && this.edit && this.form) {
             field.modelName = 'profile_field_' + field.shortname;
+
+            let formData = {
+                value: field.defaultdata,
+                disabled: this.disabled
+            };
+
+            this.control = new FormControl(formData, field.required && !field.locked ? Validators.required : null);
+            this.form.addControl(field.modelName, this.control);
         }
-
-        let formData = {
-            value: field.defaultdata,
-            disabled: this.disabled
-        };
-
-        this.control = new FormControl(formData, field.required && !field.locked ? Validators.required : null);
-        this.form.addControl(field.modelName, this.control);
     }
 
 }
\ No newline at end of file
diff --git a/src/addon/userprofilefield/textarea/providers/handler.ts b/src/addon/userprofilefield/textarea/providers/handler.ts
index 9604e9a6e..1047cbfdc 100644
--- a/src/addon/userprofilefield/textarea/providers/handler.ts
+++ b/src/addon/userprofilefield/textarea/providers/handler.ts
@@ -13,7 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 import { Injectable } from '@angular/core';
-import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from '../../../../core/user/providers/user-profile-field-delegate';
+import { CoreUserProfileFieldHandler, CoreUserProfileFieldHandlerData } from
+    '../../../../core/user/providers/user-profile-field-delegate';
 import { AddonUserProfileFieldTextareaComponent } from '../component/textarea';
 import { CoreTextUtilsProvider } from '../../../../providers/utils/text';
 
diff --git a/src/classes/delegate.ts b/src/classes/delegate.ts
index d9d472fd2..6b34d75ca 100644
--- a/src/classes/delegate.ts
+++ b/src/classes/delegate.ts
@@ -39,7 +39,7 @@ export class CoreDelegate {
 
     /**
      * Logger instance get from CoreLoggerProvider.
-     * @type {function}
+     * @type {any}
      */
     protected logger;
 
@@ -84,7 +84,6 @@ export class CoreDelegate {
     constructor(delegateName: string, protected loggerProvider: CoreLoggerProvider, protected sitesProvider: CoreSitesProvider,
             protected eventsProvider: CoreEventsProvider) {
         this.logger = this.loggerProvider.getInstance(delegateName);
-        this.sitesProvider = sitesProvider;
 
         // Update handlers on this cases.
         eventsProvider.on(CoreEventsProvider.LOGIN, this.updateHandlers.bind(this));
@@ -151,9 +150,9 @@ export class CoreDelegate {
      *
      * @param {string} name The handler name.
      * @param  {boolean} [enabled]  Only enabled, or any.
-     * @return {boolean} If the controller is installed or not.
+     * @return {boolean} If the handler is registered or not.
      */
-    hasHandler(name: string, enabled = false) : boolean {
+    hasHandler(name: string, enabled = false): boolean {
         return enabled ? typeof this.enabledHandlers[name] !== 'undefined' : typeof this.handlers[name] !== 'undefined';
     }
 
@@ -172,9 +171,12 @@ export class CoreDelegate {
     }
 
     /**
-     * Register a profile handler.
+     * Register a handler.
+     *
+     * @param {CoreDelegateHandler} handler The handler delegate object to register.
+     * @return {boolean} True when registered, false if already registered.
      */
-    registerHandler(handler: CoreDelegateHandler) {
+    registerHandler(handler: CoreDelegateHandler): boolean {
         if (typeof this.handlers[handler.name] !== 'undefined') {
             this.logger.log(`Addon '${handler.name}' already registered`);
             return false;
diff --git a/src/components/course-picker-menu/course-picker-menu-popover.ts b/src/components/course-picker-menu/course-picker-menu-popover.ts
index e654664dc..fec561f64 100644
--- a/src/components/course-picker-menu/course-picker-menu-popover.ts
+++ b/src/components/course-picker-menu/course-picker-menu-popover.ts
@@ -26,7 +26,7 @@ export class CoreCoursePickerMenuPopoverComponent {
     courses: any[];
     courseId = -1;
 
-    constructor(private navParams: NavParams, private viewCtrl: ViewController) {
+    constructor(navParams: NavParams, private viewCtrl: ViewController) {
         this.courses = navParams.get('courses') || [];
         this.courseId = navParams.get('courseId') || -1;
     }
diff --git a/src/components/rich-text-editor/rich-text-editor.ts b/src/components/rich-text-editor/rich-text-editor.ts
index 3f41f9f49..41a2df9c3 100644
--- a/src/components/rich-text-editor/rich-text-editor.ts
+++ b/src/components/rich-text-editor/rich-text-editor.ts
@@ -29,8 +29,7 @@ import { Keyboard } from '@ionic-native/keyboard';
  * could be easily broken.
  *
  * Example:
- * <core-rich-text-editor model="newpost" placeholder="{{ 'mma.mod_forum.message' | translate }}" scroll-handle="mmaScrollHandle">
- * </core-rich-text-editor>
+ * <core-rich-text-editor item-content [control]="control" [placeholder]="field.name"></core-rich-text-editor>
  *
  * In the example above, the text written in the editor will be stored in newpost.text.
  */
diff --git a/src/components/split-view/split-view.ts b/src/components/split-view/split-view.ts
index b6f20244a..3c65bee2b 100644
--- a/src/components/split-view/split-view.ts
+++ b/src/components/split-view/split-view.ts
@@ -14,9 +14,8 @@
 
 // Code based on https://github.com/martinpritchardelevate/ionic-split-pane-demo
 
-import { Component, ViewChild, Injectable, Input, ElementRef, OnInit } from '@angular/core';
+import { Component, ViewChild, Input, ElementRef, OnInit } from '@angular/core';
 import { NavController, Nav } from 'ionic-angular';
-import { CoreSplitViewPlaceholderPage } from './placeholder/placeholder';
 
 /**
  * Directive to create a split view layout.
diff --git a/src/components/tabs/tab.ts b/src/components/tabs/tab.ts
index 1435f2247..efeb1ef4d 100644
--- a/src/components/tabs/tab.ts
+++ b/src/components/tabs/tab.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input, Output, OnInit, OnDestroy, ElementRef, EventEmitter, ContentChild, TemplateRef,
-    ViewChild } from '@angular/core';
+import { Component, Input, Output, OnInit, OnDestroy, ElementRef, EventEmitter, ContentChild, TemplateRef } from '@angular/core';
 import { CoreTabsComponent } from './tabs';
 import { Content } from 'ionic-angular';
 
diff --git a/src/components/tabs/tabs.ts b/src/components/tabs/tabs.ts
index 2fca81ca0..2ad6402d2 100644
--- a/src/components/tabs/tabs.ts
+++ b/src/components/tabs/tabs.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import { Component, Input, Output, EventEmitter, OnInit, OnChanges, AfterViewInit, ViewChild, ElementRef,
-         SimpleChange } from '@angular/core';
+    SimpleChange } from '@angular/core';
 import { CoreTabComponent } from './tab';
 import { Content } from 'ionic-angular';
 
diff --git a/src/core/contentlinks/providers/helper.ts b/src/core/contentlinks/providers/helper.ts
index 3033cc368..35768d6f7 100644
--- a/src/core/contentlinks/providers/helper.ts
+++ b/src/core/contentlinks/providers/helper.ts
@@ -72,7 +72,7 @@ export class CoreContentLinksHelperProvider {
      */
     goInSite(navCtrl: NavController, pageName: string, pageParams: any, siteId?: string) : void {
         siteId = siteId || this.sitesProvider.getCurrentSiteId();
-        if (siteId == this.sitesProvider.getCurrentSiteId()) {
+        if (navCtrl && siteId == this.sitesProvider.getCurrentSiteId()) {
             navCtrl.push(pageName, pageParams);
         } else {
             this.loginHelper.redirect(pageName, pageParams, siteId);
diff --git a/src/core/course/components/unsupported-module/unsupported-module.ts b/src/core/course/components/unsupported-module/unsupported-module.ts
index 1c1910d87..7c4fca123 100644
--- a/src/core/course/components/unsupported-module/unsupported-module.ts
+++ b/src/core/course/components/unsupported-module/unsupported-module.ts
@@ -13,9 +13,6 @@
 // limitations under the License.
 
 import { Component, Input, OnInit } from '@angular/core';
-import { IonicPage, NavParams } from 'ionic-angular';
-import { TranslateService } from '@ngx-translate/core';
-import { CoreTextUtilsProvider } from '../../../../providers/utils/text';
 import { CoreCourseProvider } from '../../providers/course';
 import { CoreCourseModuleDelegate } from '../../providers/module-delegate';
 
@@ -34,8 +31,7 @@ export class CoreCourseUnsupportedModuleComponent implements OnInit {
     isSupportedByTheApp: boolean;
     moduleName: string;
 
-    constructor(navParams: NavParams, private translate: TranslateService, private textUtils: CoreTextUtilsProvider,
-            private courseProvider: CoreCourseProvider, private moduleDelegate: CoreCourseModuleDelegate) {}
+    constructor(private courseProvider: CoreCourseProvider, private moduleDelegate: CoreCourseModuleDelegate) {}
 
     /**
      * Component being initialized.
diff --git a/src/core/course/pages/unsupported-module/unsupported-module.ts b/src/core/course/pages/unsupported-module/unsupported-module.ts
index 9d2be19fe..3cbe20d7c 100644
--- a/src/core/course/pages/unsupported-module/unsupported-module.ts
+++ b/src/core/course/pages/unsupported-module/unsupported-module.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import { Component } from '@angular/core';
-import { IonicPage, NavParams, NavController } from 'ionic-angular';
+import { IonicPage, NavParams } from 'ionic-angular';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreTextUtilsProvider } from '../../../../providers/utils/text';
 
@@ -28,8 +28,7 @@ import { CoreTextUtilsProvider } from '../../../../providers/utils/text';
 export class CoreCourseUnsupportedModulePage {
     module: any;
 
-    constructor(navParams: NavParams, private translate: TranslateService, private textUtils: CoreTextUtilsProvider,
-            private navCtrl: NavController) {
+    constructor(navParams: NavParams, private translate: TranslateService, private textUtils: CoreTextUtilsProvider) {
         this.module = navParams.get('module') || {};
     }
 
diff --git a/src/core/course/providers/helper.ts b/src/core/course/providers/helper.ts
index 226ca0d19..fbd6ad427 100644
--- a/src/core/course/providers/helper.ts
+++ b/src/core/course/providers/helper.ts
@@ -25,7 +25,7 @@ import { CoreCoursesDelegate, CoreCoursesHandlerToDisplay } from '../../courses/
 import { CoreSiteHomeProvider } from '../../sitehome/providers/sitehome';
 import { CoreCourseProvider } from './course';
 import { CoreCourseModuleDelegate } from './module-delegate';
-import { CoreCourseModulePrefetchDelegate, CoreCourseModulePrefetchHandler } from './module-prefetch-delegate';
+import { CoreCourseModulePrefetchDelegate } from './module-prefetch-delegate';
 import { CoreLoginHelperProvider } from '../../login/providers/helper';
 import { CoreConstants } from '../../constants';
 import { CoreSite } from '../../../classes/site';
diff --git a/src/core/course/providers/module-prefetch-delegate.ts b/src/core/course/providers/module-prefetch-delegate.ts
index 50b44fb64..39b492d7f 100644
--- a/src/core/course/providers/module-prefetch-delegate.ts
+++ b/src/core/course/providers/module-prefetch-delegate.ts
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 import { Injectable } from '@angular/core';
-import { NavController } from 'ionic-angular';
 import { CoreEventsProvider } from '../../../providers/events';
 import { CoreFileProvider } from '../../../providers/file';
 import { CoreFilepoolProvider } from '../../../providers/filepool';
@@ -957,8 +956,7 @@ export class CoreCourseModulePrefetchDelegate {
      * @return {Promise<boolean>} Promise resolved with true if downloadable, false otherwise.
      */
     isModuleDownloadable(module: any, courseId: number) : Promise<boolean> {
-        let handler = this.getPrefetchHandlerFor(module),
-            promise;
+        let handler = this.getPrefetchHandlerFor(module);
 
         if (handler) {
             if (typeof handler.isDownloadable == 'function') {
diff --git a/src/core/courses/components/course-list-item/course-list-item.ts b/src/core/courses/components/course-list-item/course-list-item.ts
index 9e67707f1..bdc378218 100644
--- a/src/core/courses/components/course-list-item/course-list-item.ts
+++ b/src/core/courses/components/course-list-item/course-list-item.ts
@@ -31,7 +31,8 @@ import { CoreCoursesProvider } from '../../providers/courses';
 export class CoreCoursesCourseListItemComponent implements OnInit {
     @Input() course: any; // The course to render.
 
-    constructor(private navCtrl: NavController, private translate: TranslateService, private coursesProvider: CoreCoursesProvider) {}
+    constructor(private navCtrl: NavController, private translate: TranslateService, private coursesProvider: CoreCoursesProvider) {
+    }
 
     /**
      * Component being initialized.
diff --git a/src/core/courses/components/course-progress/course-progress.ts b/src/core/courses/components/course-progress/course-progress.ts
index 2084e6113..b5052c506 100644
--- a/src/core/courses/components/course-progress/course-progress.ts
+++ b/src/core/courses/components/course-progress/course-progress.ts
@@ -14,7 +14,6 @@
 
 import { Component, Input, OnInit, OnDestroy } from '@angular/core';
 import { NavController } from 'ionic-angular';
-import { TranslateService } from '@ngx-translate/core';
 import { CoreEventsProvider } from '../../../../providers/events';
 import { CoreSitesProvider } from '../../../../providers/sites';
 import { CoreDomUtilsProvider } from '../../../../providers/utils/dom';
@@ -45,7 +44,7 @@ export class CoreCoursesCourseProgressComponent implements OnInit, OnDestroy {
     protected isDestroyed = false;
     protected courseStatusObserver;
 
-    constructor(private navCtrl: NavController, private translate: TranslateService, private courseHelper: CoreCourseHelperProvider,
+    constructor(private navCtrl: NavController, private courseHelper: CoreCourseHelperProvider,
             private courseFormatDelegate: CoreCourseFormatDelegate, private domUtils: CoreDomUtilsProvider,
             private courseProvider: CoreCourseProvider, eventsProvider: CoreEventsProvider, sitesProvider: CoreSitesProvider) {
         // Listen for status change in course.
diff --git a/src/core/courses/providers/my-overview-link-handler.ts b/src/core/courses/providers/my-overview-link-handler.ts
index 28905b628..fb9d1f648 100644
--- a/src/core/courses/providers/my-overview-link-handler.ts
+++ b/src/core/courses/providers/my-overview-link-handler.ts
@@ -16,7 +16,6 @@ import { Injectable } from '@angular/core';
 import { CoreContentLinksHandlerBase } from '../../contentlinks/classes/base-handler';
 import { CoreContentLinksAction } from '../../contentlinks/providers/delegate';
 import { CoreLoginHelperProvider } from '../../login/providers/helper';
-import { CoreCoursesProvider } from './courses';
 
 /**
  * Handler to treat links to my overview.
@@ -27,7 +26,7 @@ export class CoreCoursesMyOverviewLinkHandler extends CoreContentLinksHandlerBas
     featureName = '$mmSideMenuDelegate_mmCourses';
     pattern = /\/my\/?$/;
 
-    constructor(private coursesProvider: CoreCoursesProvider, private loginHelper: CoreLoginHelperProvider) {
+    constructor(private loginHelper: CoreLoginHelperProvider) {
         super();
     }
 
diff --git a/src/core/emulator/providers/file.ts b/src/core/emulator/providers/file.ts
index 70c61ba0d..4ffb1a4c5 100644
--- a/src/core/emulator/providers/file.ts
+++ b/src/core/emulator/providers/file.ts
@@ -384,7 +384,8 @@ export class FileMock extends File {
      * @param {string} dirName The source directory name.
      * @param {string} newPath The destionation path to the directory.
      * @param {string} newDirName The destination directory name.
-     * @returns {Promise<DirectoryEntry|Entry>} Returns a Promise that resolves to the new DirectoryEntry object or rejects with an error.
+     * @returns {Promise<DirectoryEntry|Entry>} Returns a Promise that resolves to the new DirectoryEntry object or rejects with
+     *                                          an error.
      */
     moveDir(path: string, dirName: string, newPath: string, newDirName: string): Promise<DirectoryEntry | Entry> {
         return this.resolveDirectoryUrl(path).then((fse) => {
@@ -421,7 +422,8 @@ export class FileMock extends File {
      * Read file and return data as an ArrayBuffer.
      * @param {string} path Base FileSystem.
      * @param {string} file Name of file, relative to path.
-     * @returns {Promise<ArrayBuffer>} Returns a Promise that resolves with the contents of the file as ArrayBuffer or rejects with an error.
+     * @returns {Promise<ArrayBuffer>} Returns a Promise that resolves with the contents of the file as ArrayBuffer or rejects
+     *                                 with an error.
      */
     readAsArrayBuffer(path: string, file: string): Promise<ArrayBuffer> {
         return this.readFileMock<ArrayBuffer>(path, file, 'ArrayBuffer');
@@ -444,7 +446,8 @@ export class FileMock extends File {
 
      * @param {string} path Base FileSystem.
      * @param {string} file Name of file, relative to path.
-     * @returns {Promise<string>} Returns a Promise that resolves with the contents of the file as data URL or rejects with an error.
+     * @returns {Promise<string>} Returns a Promise that resolves with the contents of the file as data URL or rejects
+     *                            with an error.
      */
     readAsDataURL(path: string, file: string): Promise<string> {
         return this.readFileMock<string>(path, file, 'DataURL');
diff --git a/src/core/emulator/providers/local-notifications.ts b/src/core/emulator/providers/local-notifications.ts
index 2d8e27af1..5f0e23abb 100644
--- a/src/core/emulator/providers/local-notifications.ts
+++ b/src/core/emulator/providers/local-notifications.ts
@@ -712,7 +712,8 @@ export class LocalNotificationsMock extends LocalNotifications {
                 let tileNotif = new this.winNotif.TileNotification({
                     tag: notification.id + '',
                     template: this.tileTemplate,
-                    strings: [notification.title, notification.text, notification.title,  notification.text, notification.title, notification.text],
+                    strings: [notification.title, notification.text, notification.title,  notification.text, notification.title,
+                        notification.text],
                     expirationTime: new Date(Date.now() + CoreConstants.SECONDS_HOUR * 1000) // Expire in 1 hour.
                 })
 
diff --git a/src/core/fileuploader/providers/helper.ts b/src/core/fileuploader/providers/helper.ts
index 438ee93c9..3573eba52 100644
--- a/src/core/fileuploader/providers/helper.ts
+++ b/src/core/fileuploader/providers/helper.ts
@@ -65,7 +65,8 @@ export class CoreFileUploaderHelperProvider {
         }
 
         wifiThreshold = typeof wifiThreshold == 'undefined' ? CoreFileUploaderProvider.WIFI_SIZE_WARNING : wifiThreshold;
-        limitedThreshold = typeof limitedThreshold == 'undefined' ? CoreFileUploaderProvider.LIMITED_SIZE_WARNING : limitedThreshold;
+        limitedThreshold = typeof limitedThreshold == 'undefined' ?
+            CoreFileUploaderProvider.LIMITED_SIZE_WARNING : limitedThreshold;
 
         if (size < 0) {
             return this.domUtils.showConfirm(this.translate.instant('core.fileuploader.confirmuploadunknownsize'));
diff --git a/src/core/login/pages/email-signup/email-signup.ts b/src/core/login/pages/email-signup/email-signup.ts
index c351f4aab..e8853c67b 100644
--- a/src/core/login/pages/email-signup/email-signup.ts
+++ b/src/core/login/pages/email-signup/email-signup.ts
@@ -229,7 +229,8 @@ export class CoreLoginEmailSignupPage {
             }
 
             // Get the data for the custom profile fields.
-            this.userProfileFieldDelegate.getDataForFields(this.settings.profilefields, true, 'email', this.signupForm.value).then((fieldsData) => {
+            this.userProfileFieldDelegate.getDataForFields(this.settings.profilefields, true, 'email', this.signupForm.value).then(
+                    (fieldsData) => {
                 params.customprofilefields = fieldsData;
 
                 this.wsProvider.callAjax('auth_email_signup_user', params, {siteUrl: this.siteUrl}).then((result) => {
diff --git a/src/core/mainmenu/providers/delegate.ts b/src/core/mainmenu/providers/delegate.ts
index da5594cd5..c2a4e3959 100644
--- a/src/core/mainmenu/providers/delegate.ts
+++ b/src/core/mainmenu/providers/delegate.ts
@@ -88,7 +88,7 @@ export class CoreMainMenuDelegate extends CoreDelegate  {
     protected handlers: {[s: string]: CoreMainMenuHandler} = {};
     protected enabledHandlers: {[s: string]: CoreMainMenuHandler} = {};
     protected loaded = false;
-    protected siteHandlers: Subject<CoreMainMenuHandlerToDisplay[]> = new BehaviorSubject<CoreMainMenuHandlerData[]>([]);
+    protected siteHandlers: Subject<CoreMainMenuHandlerToDisplay[]> = new BehaviorSubject<CoreMainMenuHandlerToDisplay[]>([]);
     protected featurePrefix = '$mmSideMenuDelegate_';
 
     constructor(protected loggerProvider: CoreLoggerProvider, protected sitesProvider: CoreSitesProvider,
diff --git a/src/core/sitehome/components/all-course-list/all-course-list.ts b/src/core/sitehome/components/all-course-list/all-course-list.ts
index 71ea79d22..3e71c3373 100644
--- a/src/core/sitehome/components/all-course-list/all-course-list.ts
+++ b/src/core/sitehome/components/all-course-list/all-course-list.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input } from '@angular/core';
-import { IonicPage } from 'ionic-angular';
+import { Component } from '@angular/core';
 import { CoreCoursesProvider } from '../../../courses/providers/courses';
 
 /**
diff --git a/src/core/sitehome/components/categories/categories.ts b/src/core/sitehome/components/categories/categories.ts
index 6cfa1b25d..3ae52da32 100644
--- a/src/core/sitehome/components/categories/categories.ts
+++ b/src/core/sitehome/components/categories/categories.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input } from '@angular/core';
-import { IonicPage } from 'ionic-angular';
+import { Component } from '@angular/core';
 import { CoreCoursesProvider } from '../../../courses/providers/courses';
 
 /**
diff --git a/src/core/sitehome/components/course-search/course-search.ts b/src/core/sitehome/components/course-search/course-search.ts
index 8a74bfad5..454a3d1f4 100644
--- a/src/core/sitehome/components/course-search/course-search.ts
+++ b/src/core/sitehome/components/course-search/course-search.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input } from '@angular/core';
-import { IonicPage } from 'ionic-angular';
+import { Component } from '@angular/core';
 import { CoreCoursesProvider } from '../../../courses/providers/courses';
 
 /**
diff --git a/src/core/sitehome/components/enrolled-course-list/enrolled-course-list.ts b/src/core/sitehome/components/enrolled-course-list/enrolled-course-list.ts
index ab05eeb73..5c3cf6ae2 100644
--- a/src/core/sitehome/components/enrolled-course-list/enrolled-course-list.ts
+++ b/src/core/sitehome/components/enrolled-course-list/enrolled-course-list.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input, OnInit } from '@angular/core';
-import { IonicPage } from 'ionic-angular';
+import { Component, OnInit } from '@angular/core';
 import { CoreCoursesProvider } from '../../../courses/providers/courses';
 
 /**
diff --git a/src/core/sitehome/components/index/index.ts b/src/core/sitehome/components/index/index.ts
index 88d052376..f883ab7dc 100644
--- a/src/core/sitehome/components/index/index.ts
+++ b/src/core/sitehome/components/index/index.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, OnInit, Input } from '@angular/core';
-import { IonicPage } from 'ionic-angular';
+import { Component, OnInit } from '@angular/core';
 import { CoreSitesProvider } from '../../../../providers/sites';
 import { CoreDomUtilsProvider } from '../../../../providers/utils/dom';
 import { CoreCourseProvider } from '../../../course/providers/course';
diff --git a/src/core/sitehome/components/news/news.ts b/src/core/sitehome/components/news/news.ts
index 32519d767..a9b6ec75f 100644
--- a/src/core/sitehome/components/news/news.ts
+++ b/src/core/sitehome/components/news/news.ts
@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, OnInit, Input } from '@angular/core';
-import { IonicPage } from 'ionic-angular';
+import { Component, OnInit } from '@angular/core';
 import { CoreSitesProvider } from '../../../../providers/sites';
 
 /**
diff --git a/src/core/user/components/user-profile-field/user-profile-field.ts b/src/core/user/components/user-profile-field/user-profile-field.ts
index b79bdfd0f..f10494844 100644
--- a/src/core/user/components/user-profile-field/user-profile-field.ts
+++ b/src/core/user/components/user-profile-field/user-profile-field.ts
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { Component, Input, ViewChild, ViewContainerRef, ComponentFactoryResolver, ComponentRef, OnInit } from '@angular/core';
+import { Component, Input, ViewChild, ViewContainerRef, ComponentFactoryResolver, OnInit } from '@angular/core';
 import { CoreLoggerProvider } from '../../../../providers/logger';
 import { CoreUserProfileFieldDelegate } from '../../providers/user-profile-field-delegate';
 import { CoreUtilsProvider } from '../../../../providers/utils/utils';
diff --git a/src/core/user/pages/about/about.html b/src/core/user/pages/about/about.html
index f95e6f7c3..f56825db7 100644
--- a/src/core/user/pages/about/about.html
+++ b/src/core/user/pages/about/about.html
@@ -7,7 +7,7 @@
     <ion-refresher [enabled]="userLoaded" (ionRefresh)="refreshUser($event)">
         <ion-refresher-content pullingText="{{ 'core.pulltorefresh' | translate }}"></ion-refresher-content>
     </ion-refresher>
-    <core-loading [hideUntil]="userLoaded" class="core-loading-center">
+    <core-loading [hideUntil]="userLoaded">
         <div *ngIf="user">
             <ion-item-group *ngIf="hasContact">
                 <ion-item-divider color="light">{{ 'core.user.contact' | translate}}</ion-item-divider>
@@ -20,13 +20,13 @@
                 <ion-item text-wrap *ngIf="user.phone1">
                     <h2>{{ 'core.user.phone1' | translate}}</h2>
                     <p><a href="tel:{{user.phone1}}" core-link auto-login="no">
-                            <core-format-text [text]="user.phone1"></core-format-text>
+                        <core-format-text [text]="user.phone1"></core-format-text>
                     </a></p>
                 </ion-item>
                 <ion-item text-wrap *ngIf="user.phone2">
                     <h2>{{ 'core.user.phone2' | translate}}</h2>
                     <p><a href="tel:{{user.phone2}}" core-link auto-login="no">
-                            <core-format-text [text]="user.phone2"></core-format-text>
+                        <core-format-text [text]="user.phone2"></core-format-text>
                     </a></p>
                 </ion-item>
                 <ion-item text-wrap *ngIf="user.address">
@@ -36,7 +36,8 @@
                         </a>
                         <a *ngIf="!isAndroid" href="http://maps.google.com?q={{user.encodedAddress}}" core-link auto-login="no">
                             <core-format-text [text]="user.address"></core-format-text>
-                    </a></p>
+                        </a>
+                    </p>
                 </ion-item>
                 <ion-item text-wrap *ngIf="user.city && !user.address">
                     <h2>{{ 'core.user.city' | translate}}</h2>
@@ -52,7 +53,7 @@
                 <ion-item text-wrap *ngIf="user.url">
                     <h2>{{ 'core.user.webpage' | translate}}</h2>
                     <p><a href="{{user.url}}" core-link>
-                            <core-format-text [text]="user.url"></core-format-text>
+                        <core-format-text [text]="user.url"></core-format-text>
                     </a></p>
                 </ion-item>
                 <ion-item text-wrap *ngIf="user.interests">
diff --git a/src/core/user/pages/about/about.ts b/src/core/user/pages/about/about.ts
index 603e8e43b..05c05926d 100644
--- a/src/core/user/pages/about/about.ts
+++ b/src/core/user/pages/about/about.ts
@@ -17,7 +17,6 @@ import { IonicPage, NavParams, Platform } from 'ionic-angular';
 import { CoreUserProvider } from '../../providers/user';
 import { CoreUserHelperProvider } from '../../providers/helper';
 import { CoreDomUtilsProvider } from '../../../../providers/utils/dom';
-import { CoreCoursesProvider } from '../../../courses/providers/courses';
 import { CoreEventsProvider } from '../../../../providers/events';
 import { CoreSitesProvider } from '../../../../providers/sites';
 
@@ -41,7 +40,7 @@ export class CoreUserAboutPage {
     user: any = {};
     title: string;
 
-    constructor(private navParams: NavParams, private userProvider: CoreUserProvider, private userHelper: CoreUserHelperProvider,
+    constructor(navParams: NavParams, private userProvider: CoreUserProvider, private userHelper: CoreUserHelperProvider,
             private domUtils: CoreDomUtilsProvider, private eventsProvider: CoreEventsProvider,
             private sitesProvider: CoreSitesProvider, private platform: Platform) {
 
diff --git a/src/core/user/pages/profile/profile.html b/src/core/user/pages/profile/profile.html
index efc7cba54..fda94e955 100644
--- a/src/core/user/pages/profile/profile.html
+++ b/src/core/user/pages/profile/profile.html
@@ -7,7 +7,7 @@
     <ion-refresher [enabled]="userLoaded" (ionRefresh)="refreshUser($event)">
         <ion-refresher-content pullingText="{{ 'core.pulltorefresh' | translate }}"></ion-refresher-content>
     </ion-refresher>
-    <core-loading [hideUntil]="userLoaded" class="core-loading-center">
+    <core-loading [hideUntil]="userLoaded">
         <ion-list *ngIf="user && !isDeleted">
             <ion-item text-center>
                 <div class="item-avatar-center">
@@ -51,7 +51,7 @@
             </a>
 
             <ion-item *ngIf="actionHandlers && actionHandlers.length">
-                <button *ngFor="let actHandler of actionHandlers" ion-button block outline [ngClass]="['core-user-profile-handler', actHandler.class]" (click)="actHandler.action($event)" [hidden]="actHandler.hidden" title="{{ actHandler.title | translate }}">
+                <button *ngFor="let actHandler of actionHandlers" ion-button block outline [ngClass]="['core-user-profile-handler', actHandler.class]" (click)="actHandler.action($event, user, courseId)" [hidden]="actHandler.hidden" title="{{ actHandler.title | translate }}">
                     <ion-icon *ngIf="actHandler.icon" [name]="actHandler.icon" item-start></ion-icon>
                     {{ actHandler.title | translate }}
                     <ion-spinner *ngIf="actHandler.spinner" item-end></ion-spinner>
diff --git a/src/core/user/pages/profile/profile.ts b/src/core/user/pages/profile/profile.ts
index 75f9456a1..f8615b215 100644
--- a/src/core/user/pages/profile/profile.ts
+++ b/src/core/user/pages/profile/profile.ts
@@ -49,7 +49,7 @@ export class CoreUserProfilePage {
     newPageHandlers = [];
     communicationHandlers = [];
 
-    constructor(private navParams: NavParams, private userProvider: CoreUserProvider, private userHelper: CoreUserHelperProvider,
+    constructor(navParams: NavParams, private userProvider: CoreUserProvider, private userHelper: CoreUserHelperProvider,
             private domUtils: CoreDomUtilsProvider, private translate: TranslateService, private eventsProvider: CoreEventsProvider,
             private coursesProvider: CoreCoursesProvider, private sitesProvider: CoreSitesProvider,
             private mimetypeUtils: CoreMimetypeUtilsProvider, private fileUploaderHelper: CoreFileUploaderHelperProvider,
@@ -81,7 +81,7 @@ export class CoreUserProfilePage {
     ionViewDidLoad() {
         this.fetchUser().then(() => {
             return this.userProvider.logView(this.userId, this.courseId).catch((error) => {
-                this.isDeleted = error === this.translate.instant('core.userdeleted');
+                this.isDeleted = error.errorcode === 'userdeleted';
             });
         }).finally(() => {
             this.userLoaded = true;
@@ -142,10 +142,11 @@ export class CoreUserProfilePage {
             let modal = this.domUtils.showModalLoading('core.sending', true);
 
             return this.userProvider.changeProfilePicture(result.itemid, this.userId).then((profileImageURL) => {
-                this.eventsProvider.trigger(CoreUserProvider.PROFILE_PICTURE_UPDATED, {userId: this.userId, picture: profileImageURL});
+                this.eventsProvider.trigger(CoreUserProvider.PROFILE_PICTURE_UPDATED, {userId: this.userId,
+                    picture: profileImageURL});
                 this.sitesProvider.updateSiteInfo(this.site.getId());
                 this.refreshUser();
-            }).finally(function() {
+            }).finally(() => {
                 modal.dismiss();
             });
         }).catch((message) => {
diff --git a/src/core/user/providers/user-delegate.ts b/src/core/user/providers/user-delegate.ts
index 659d09ba8..97a50f6eb 100644
--- a/src/core/user/providers/user-delegate.ts
+++ b/src/core/user/providers/user-delegate.ts
@@ -72,7 +72,7 @@ export interface CoreUserProfileHandlerData {
      * Additional class to add to the HTML.
      * @type {string}
      */
-    class: string;
+    class?: string;
 
     /**
      * If enabled, element will be hidden. Only for TYPE_NEW_PAGE and TYPE_ACTION.
@@ -135,7 +135,7 @@ export class CoreUserDelegate extends CoreDelegate {
      * @param {number} courseId The course ID.
      * @return {Promise<any>} Resolved with an array of objects containing 'priority', 'data' and 'type'.
      */
-    getProfileHandlersFor(user: any, courseId): Promise<any> {
+    getProfileHandlersFor(user: any, courseId: number): Promise<any> {
         let handlers = [],
             promises = [];
 
@@ -147,7 +147,7 @@ export class CoreUserDelegate extends CoreDelegate {
 
             return this.coursesProvider.getCoursesOptions(courseIds).then((options) => {
                 // For backwards compatibility we don't modify the courseId.
-                let courseIdForOptions = courseId || this.sitesProvider.getSiteHomeId(),
+                let courseIdForOptions = courseId || this.sitesProvider.getCurrentSiteHomeId(),
                     navOptions = options.navOptions[courseIdForOptions],
                     admOptions = options.admOptions[courseIdForOptions];
 
@@ -165,7 +165,7 @@ export class CoreUserDelegate extends CoreDelegate {
                             } else {
                                 return Promise.reject(null);
                             }
-                        }).catch(function() {
+                        }).catch(() => {
                             // Nothing to do here, it is not enabled for this user.
                         });
                         promises.push(promise);
@@ -175,7 +175,7 @@ export class CoreUserDelegate extends CoreDelegate {
                     return handlers;
                 });
             });
-        }).catch(function() {
+        }).catch(() => {
             // Never fails.
             return handlers;
         });
diff --git a/src/core/user/providers/user-handler.ts b/src/core/user/providers/user-handler.ts
index 48f439250..971851e48 100644
--- a/src/core/user/providers/user-handler.ts
+++ b/src/core/user/providers/user-handler.ts
@@ -63,7 +63,7 @@ export class CoreUserProfileMailHandler implements CoreUserProfileHandler {
             action: ($event, user, courseId) => {
                 $event.preventDefault();
                 $event.stopPropagation();
-                window.location.href = "mailto:" + user.email;
+                window.open("mailto:" + user.email, '_blank');
             }
         };
     }
diff --git a/src/core/user/providers/user-link-handler.ts b/src/core/user/providers/user-link-handler.ts
index bd2515783..6d9020fe4 100644
--- a/src/core/user/providers/user-link-handler.ts
+++ b/src/core/user/providers/user-link-handler.ts
@@ -15,7 +15,7 @@
 import { Injectable } from '@angular/core';
 import { CoreContentLinksHandlerBase } from '../../contentlinks/classes/base-handler';
 import { CoreContentLinksAction } from '../../contentlinks/providers/delegate';
-import { CoreLoginHelperProvider } from '../../login/providers/helper';
+import { CoreContentLinksHelperProvider } from '../../contentlinks/providers/helper';
 
 /**
  * Handler to treat links to user profiles.
@@ -26,7 +26,7 @@ export class CoreUserProfileLinkHandler extends CoreContentLinksHandlerBase {
     // Match user/view.php and user/profile.php but NOT grade/report/user/.
     pattern = /((\/user\/view\.php)|(\/user\/profile\.php)).*([\?\&]id=\d+)/;
 
-    constructor(private loginHelper: CoreLoginHelperProvider) {
+    constructor(private linkHelper: CoreContentLinksHelperProvider) {
         super();
     }
 
@@ -43,12 +43,12 @@ export class CoreUserProfileLinkHandler extends CoreContentLinksHandlerBase {
             CoreContentLinksAction[]|Promise<CoreContentLinksAction[]> {
         return [{
             action: (siteId, navCtrl?) => {
-                let stateParams = {
+                let pageParams = {
                     courseId: params.course,
                     userId: parseInt(params.id, 10)
                 };
                 // Always use redirect to make it the new history root (to avoid "loops" in history).
-                this.loginHelper.redirect('CoreUserProfilePage', stateParams, siteId);
+                this.linkHelper.goInSite(navCtrl, 'CoreUserProfilePage', pageParams, siteId);
             }
         }];
     }
diff --git a/src/core/user/providers/user.ts b/src/core/user/providers/user.ts
index 21c647b7f..97dcc35fc 100644
--- a/src/core/user/providers/user.ts
+++ b/src/core/user/providers/user.ts
@@ -61,10 +61,10 @@ export class CoreUserProvider {
      * Change the given user profile picture.
      *
      * @param  {number} draftItemId New picture draft item id.
-     * @param  {number} id          User ID.
-     * @return {Promise<any>}            Promise resolve with the new profileimageurl
+     * @param  {number} userId      User ID.
+     * @return {Promise<string>}       Promise resolve with the new profileimageurl
      */
-    changeProfilePicture(draftItemId: number, userId: number): Promise<any> {
+    changeProfilePicture(draftItemId: number, userId: number): Promise<string> {
         var data = {
             'draftitemid': draftItemId,
             'delete': 0,
@@ -83,7 +83,7 @@ export class CoreUserProvider {
      * Store user basic information in local DB to be retrieved if the WS call fails.
      *
      * @param  {number} userId  User ID.
-     * @param {string} [siteId] ID of the site the event belongs to. If not defined, use current site.
+     * @param {string} [siteId] ID of the site. If not defined, use current site.
      * @return {Promise<any>}   Promise resolve when the user is deleted.
      */
     deleteStoredUser(userId: number, siteId?: string): Promise<any> {
@@ -111,24 +111,24 @@ export class CoreUserProvider {
      * @param  {number} userId      User's ID.
      * @param  {number} [courseId]  Course ID to get course profile, undefined or 0 to get site profile.
      * @param  {boolean} [forceLocal] True to retrieve the user data from local DB, false to retrieve it from WS.
-     * @param {string} [siteId] ID of the site the event belongs to. If not defined, use current site.
+     * @param {string} [siteId] ID of the site. If not defined, use current site.
      * @return {Promise<any>}            Promise resolved with the user data.
      */
-    getProfile(userId: number, courseId: number, forceLocal = false, siteId?: string): Promise<any> {
+    getProfile(userId: number, courseId?: number, forceLocal = false, siteId?: string): Promise<any> {
         siteId = siteId || this.sitesProvider.getCurrentSiteId();
 
         if (forceLocal) {
-            return this.getUserFromLocalDb(userId, siteId).catch(function() {
+            return this.getUserFromLocalDb(userId, siteId).catch(() => {
                 return this.getUserFromWS(userId, courseId, siteId);
             });
         }
-        return this.getUserFromWS(userId, courseId, siteId).catch(function() {
+        return this.getUserFromWS(userId, courseId, siteId).catch(() => {
             return this.getUserFromLocalDb(userId, siteId);
         });
     }
 
     /**
-     * Invalidates user WS calls.
+     * Get cache key for a user WS call.
      *
      * @param  {number} userId User ID.
      * @return {string}        Cache key.
@@ -141,7 +141,7 @@ export class CoreUserProvider {
      * Get user basic information from local DB.
      *
      * @param {number} userId User ID.
-     * @param {string} [siteId] ID of the site the event belongs to. If not defined, use current site.
+     * @param {string} [siteId] ID of the site. If not defined, use current site.
      * @return {Promise<any>}   Promise resolve when the user is retrieved.
      */
     protected getUserFromLocalDb(userId: number, siteId?: string): Promise<any> {
@@ -158,7 +158,7 @@ export class CoreUserProvider {
      * @param {string} [siteId] ID of the site. If not defined, use current site.
      * @return {Promise<any>}           Promise resolve when the user is retrieved.
      */
-    protected getUserFromWS(userId: number, courseId: number, siteId?: string): Promise<any> {
+    protected getUserFromWS(userId: number, courseId?: number, siteId?: string): Promise<any> {
         return this.sitesProvider.getSite(siteId).then((site) => {
             let presets = {
                     cacheKey: this.getUserCacheKey(userId)
@@ -218,7 +218,7 @@ export class CoreUserProvider {
      * @return {boolean}       True if disabled, false otherwise.
      */
     isUpdatePictureDisabledInSite(site?: CoreSite) : boolean {
-         site = site || this.sitesProvider.getCurrentSite();
+        site = site || this.sitesProvider.getCurrentSite();
         return site.isFeatureDisabled('$mmUserDelegate_picture');
     };
 
@@ -226,14 +226,18 @@ export class CoreUserProvider {
     /**
      * Log User Profile View in Moodle.
      * @param  {number}       userId   User ID.
-     * @param  {number}       courseId Course ID.
+     * @param  {number}       [courseId] Course ID.
      * @return {Promise<any>}          Promise resolved when done.
      */
     logView(userId: number, courseId?: number) : Promise<any> {
-        return this.sitesProvider.getCurrentSite().write('core_user_view_user_profile', {
-            userid: userId,
-            courseid: courseId
-        });
+        let params = {
+            userid: userId
+        };
+
+        if (courseId) {
+            params['courseid'] = courseId;
+        }
+        return this.sitesProvider.getCurrentSite().write('core_user_view_user_profile', params);
     }
 
     /**
@@ -242,10 +246,10 @@ export class CoreUserProvider {
      * @param {number} userId   User ID.
      * @param {string} fullname User full name.
      * @param {string} avatar   User avatar URL.
-     * @param  {string} [siteId] ID of the site the event belongs to. If not defined, use current site.
+     * @param  {string} [siteId] ID of the site. If not defined, use current site.
      * @return {Promise<any>}         Promise resolve when the user is stored.
      */
-    protected storeUser(userId: number, fullname: string, avatar: string, siteId?: string) {
+    protected storeUser(userId: number, fullname: string, avatar: string, siteId?: string): Promise<any> {
         return this.sitesProvider.getSite(siteId).then((site) => {
             let userRecord = {
                 id: userId,
diff --git a/src/directives/format-text.ts b/src/directives/format-text.ts
index d150799a9..af8a04d4b 100644
--- a/src/directives/format-text.ts
+++ b/src/directives/format-text.ts
@@ -46,7 +46,8 @@ export class CoreFormatTextDirective implements OnChanges {
     @Input() componentId?: string|number; // Component ID to use in conjunction with the component.
     @Input() adaptImg?: boolean|string = true; // Whether to adapt images to screen width.
     @Input() clean?: boolean|string; // Whether all the HTML tags should be removed.
-    @Input() singleLine?: boolean|string; // Whether new lines should be removed (all text in single line). Only valid if clean=true.
+    @Input() singleLine?: boolean|string; // Whether new lines should be removed (all text in single line). Only valid if
+                                          // clean=true.
     @Input() maxHeight?: number; // Max height in pixels to render the content box. It should be 50 at least to make sense.
                                  // Using this parameter will force display: block to calculate height better. If you want to
                                  // avoid this use class="inline" at the same time to use display: inline-block.
@@ -253,7 +254,8 @@ export class CoreFormatTextDirective implements OnChanges {
             site = siteInstance;
 
             // Apply format text function.
-            return this.textUtils.formatText(this.text, this.utils.isTrueOrOne(this.clean), this.utils.isTrueOrOne(this.singleLine));
+            return this.textUtils.formatText(this.text, this.utils.isTrueOrOne(this.clean),
+                this.utils.isTrueOrOne(this.singleLine));
         }).then((formatted) => {
             let div = document.createElement('div'),
                 canTreatVimeo = site && site.isVersionGreaterEqualThan(['3.3.4', '3.4']),
diff --git a/src/directives/user-link.ts b/src/directives/user-link.ts
index 0dcd85862..6c74a0c7e 100644
--- a/src/directives/user-link.ts
+++ b/src/directives/user-link.ts
@@ -15,7 +15,7 @@
 import { Directive, Input, OnInit, ElementRef } from '@angular/core';
 import { NavController } from 'ionic-angular';
 /**
- * Directive to open a link in external browser.
+ * Directive to go to user profile on click.
  */
 @Directive({
     selector: '[core-user-link]'
diff --git a/src/providers/sites.ts b/src/providers/sites.ts
index d49652049..ca46c1113 100644
--- a/src/providers/sites.ts
+++ b/src/providers/sites.ts
@@ -664,6 +664,20 @@ export class CoreSitesProvider {
         }
     }
 
+    /**
+     * Get the site home ID of the current site.
+     *
+     * @return {number} Current site home ID.
+     */
+    getCurrentSiteHomeId() : number {
+        if (this.currentSite) {
+            return this.currentSite.getSiteHomeId();
+        } else {
+            return 1;
+        }
+    }
+
+
     /**
      * Check if the user is logged in a site.
      *
diff --git a/src/providers/utils/dom.ts b/src/providers/utils/dom.ts
index ae8918b95..2bc835057 100644
--- a/src/providers/utils/dom.ts
+++ b/src/providers/utils/dom.ts
@@ -14,7 +14,7 @@
 
 import { Injectable } from '@angular/core';
 import { LoadingController, Loading, ToastController, Toast, AlertController, Alert, Platform, Content,
-        NavController, ModalController } from 'ionic-angular';
+    ModalController } from 'ionic-angular';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreTextUtilsProvider } from './text';
 import { CoreAppProvider } from '../app';
diff --git a/src/providers/utils/text.ts b/src/providers/utils/text.ts
index 60ce12502..f11b31500 100644
--- a/src/providers/utils/text.ts
+++ b/src/providers/utils/text.ts
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 import { Injectable } from '@angular/core';
-import { NavController, ModalController } from 'ionic-angular';
+import { ModalController } from 'ionic-angular';
 import { TranslateService } from '@ngx-translate/core';
 import { CoreLangProvider } from '../lang';
 
diff --git a/src/providers/ws.ts b/src/providers/ws.ts
index aa1d5c5c7..355001123 100644
--- a/src/providers/ws.ts
+++ b/src/providers/ws.ts
@@ -144,7 +144,8 @@ export class CoreWSProvider {
      * @param {string} siteUrl Complete site url to perform the call.
      * @param {any} ajaxData Arguments to pass to the method.
      * @param {CoreWSPreSets} preSets Extra settings and information.
-     * @return {Promise<any>} Deferred promise resolved with the response data in success and rejected with the error message if it fails.
+     * @return {Promise<any>} Deferred promise resolved with the response data in success and rejected with the error message
+     *                        if it fails.
      */
     protected addToRetryQueue(method: string, siteUrl: string, ajaxData: any, preSets: CoreWSPreSets) : Promise<any> {
         let call = {