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MOBILE-3055 courses: Trigger event if user courses list changes

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This commit is contained in:
Dani Palou 2019-07-24 09:00:12 +02:00
parent 916d408f65
commit 1024f6a96d
1 changed files with 53 additions and 3 deletions
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56
src/core/courses/providers/courses.ts
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@ -13,6 +13,7 @@
// limitations under the License.
import { Injectable } from '@angular/core';
import { CoreEventsProvider } from '@providers/events';
import { CoreLoggerProvider } from '@providers/logger';
import { CoreSitesProvider } from '@providers/sites';
import { CoreSite } from '@classes/site';
@ -24,13 +25,16 @@ import { CoreSite } from '@classes/site';
export class CoreCoursesProvider {
static SEARCH_PER_PAGE = 20;
static ENROL_INVALID_KEY = 'CoreCoursesEnrolInvalidKey';
static EVENT_MY_COURSES_UPDATED = 'courses_my_courses_updated';
static EVENT_MY_COURSES_CHANGED = 'courses_my_courses_changed'; // User course list changed while app is running.
static EVENT_MY_COURSES_UPDATED = 'courses_my_courses_updated'; // A course was hidden/favourite, or user enroled in a course.
static EVENT_MY_COURSES_REFRESHED = 'courses_my_courses_refreshed';
static EVENT_DASHBOARD_DOWNLOAD_ENABLED_CHANGED = 'dashboard_download_enabled_changed';
protected ROOT_CACHE_KEY = 'mmCourses:';
protected logger;
protected userCoursesIds: {[id: number]: boolean}; // Use an object to make it faster to search.
constructor(logger: CoreLoggerProvider, private sitesProvider: CoreSitesProvider) {
constructor(logger: CoreLoggerProvider, private sitesProvider: CoreSitesProvider, private eventsProvider: CoreEventsProvider) {
this.logger = logger.getInstance('CoreCoursesProvider');
}
@ -743,7 +747,53 @@ export class CoreCoursesProvider {
data.returnusercount = 0;
}
return site.read('core_enrol_get_users_courses', data, preSets);
return site.read('core_enrol_get_users_courses', data, preSets).then((courses) => {
if (this.userCoursesIds) {
// Check if the list of courses has changed.
const added = [],
removed = [],
previousIds = Object.keys(this.userCoursesIds),
currentIds = {}; // Use an object to make it faster to search.
courses.forEach((course) => {
currentIds[course.id] = true;
if (!this.userCoursesIds[course.id]) {
// Course added.
added.push(course.id);
}
});
if (courses.length - added.length != previousIds.length) {
// A course was removed, check which one.
previousIds.forEach((id) => {
if (!currentIds[id]) {
// Course removed.
removed.push(Number(id));
}
});
}
if (added.length || removed.length) {
// At least 1 course was added or removed, trigger the event.
this.eventsProvider.trigger(CoreCoursesProvider.EVENT_MY_COURSES_CHANGED, {
added: added,
removed: removed
}, site.getId());
}
this.userCoursesIds = currentIds;
} else {
this.userCoursesIds = {};
// Store the list of courses.
courses.forEach((course) => {
this.userCoursesIds[course.id] = true;
});
}
return courses;
});
});
}