MOBILE-2348 core: Return a 'canceled' error in showConfirm

src/addon/messages/pages/discussion/discussion.ts

@@ -518,18 +518,18 @@ export class AddonMessagesDiscussionPage implements OnDestroy {
         this.domUtils.showConfirm(this.translate.instant(langKey)).then(() => {
             const modal = this.domUtils.showModalLoading('core.deleting', true);
 
-            this.messagesProvider.deleteMessage(message).then(() => {
+            return this.messagesProvider.deleteMessage(message).then(() => {
                  // Remove message from the list without having to wait for re-fetch.
                 this.messages.splice(index, 1);
                 this.removeMessage(message.hash);
                 this.notifyNewMessage();
 
                 this.fetchData(); // Re-fetch messages to update cached data.
-            }).catch((error) => {
-                this.domUtils.showErrorModalDefault(error, 'addon.messages.errordeletemessage', true);
             }).finally(() => {
                 modal.dismiss();
             });
+        }).catch((error) => {
+            this.domUtils.showErrorModalDefault(error, 'addon.messages.errordeletemessage', true);
         });
     }
 

src/addon/messages/providers/user-add-contact-handler.ts

@@ -100,8 +100,6 @@ export class AddonMessagesAddContactUserHandler implements CoreUserProfileHandle
 
                         return this.domUtils.showConfirm(template, title, title).then(() => {
                             return this.messagesProvider.removeContact(user.id);
-                        }, () => {
-                            // Ignore on cancel.
                         });
                     } else {
                         return this.messagesProvider.addContact(user.id);

src/addon/messages/providers/user-block-contact-handler.ts

@@ -103,8 +103,6 @@ export class AddonMessagesBlockContactUserHandler implements CoreUserProfileHand
 
                         return this.domUtils.showConfirm(template, title, title).then(() => {
                             return this.messagesProvider.blockContact(user.id);
-                        }, () => {
-                            // Ignore on cancel.
                         });
                     }
                 }).catch((error) => {

src/addon/mod/quiz/pages/player/player.ts

@@ -172,7 +172,7 @@ export class AddonModQuizPlayerPage implements OnInit, OnDestroy {
             answers[button.name] = button.value;
 
             // Behaviour checks are always in online.
-            this.quizProvider.processAttempt(this.quiz, this.attempt, answers, this.preflightData).then(() => {
+            return this.quizProvider.processAttempt(this.quiz, this.attempt, answers, this.preflightData).then(() => {
                 // Reload the current page.
                 const scrollElement = this.content.getScrollElement(),
                     scrollTop = scrollElement.scrollTop || 0,
@@ -185,11 +185,11 @@ export class AddonModQuizPlayerPage implements OnInit, OnDestroy {
                     this.loaded = true;
                     this.content.scrollTo(scrollLeft, scrollTop);
                 });
-            }).catch((error) => {
-                this.domUtils.showErrorModalDefault(error, 'Error performing action.');
             }).finally(() => {
                 modal.dismiss();
             });
+        }).catch((error) => {
+            this.domUtils.showErrorModalDefault(error, 'Error performing action.');
         });
     }
 
@@ -354,11 +354,11 @@ export class AddonModQuizPlayerPage implements OnInit, OnDestroy {
                 // Leave the player.
                 this.forceLeave = true;
                 this.navCtrl.pop();
-            }).catch((error) => {
-                this.domUtils.showErrorModalDefault(error, 'addon.mod_quiz.errorsaveattempt', true);
             }).finally(() => {
                 modal.dismiss();
             });
+        }).catch((error) => {
+            this.domUtils.showErrorModalDefault(error, 'addon.mod_quiz.errorsaveattempt', true);
         });
     }
 
@@ -560,13 +560,9 @@ export class AddonModQuizPlayerPage implements OnInit, OnDestroy {
                     // Attempt is overdue or finished in offline, we can only load the summary.
                     return this.loadSummary();
                 }
-            }).catch((error) => {
-                this.domUtils.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquestions', true);
             });
         }).catch((error) => {
-            if (error) {
-                this.domUtils.showErrorModal(error);
-            }
+            this.domUtils.showErrorModalDefault(error, 'addon.mod_quiz.errorgetquestions', true);
         });
     }
 

src/addon/mod/quiz/providers/helper.ts

@@ -139,7 +139,7 @@ export class AddonModQuizHelperProvider {
                 if (typeof data != 'undefined') {
                     resolve(data);
                 } else {
-                    reject(null);
+                    reject(this.domUtils.createCanceledError());
                 }
             });
         });

src/addon/mod/survey/components/index/index.ts

@@ -188,15 +188,15 @@ export class AddonModSurveyIndexComponent extends CoreCourseModuleMainActivityCo
                 });
             }
 
-            this.surveyProvider.submitAnswers(this.survey.id, this.survey.name, this.courseId, answers).then(() => {
+            return this.surveyProvider.submitAnswers(this.survey.id, this.survey.name, this.courseId, answers).then(() => {
                 this.content.scrollToTop();
 
                 return this.refreshContent(false);
-            }).catch((message) => {
-                this.domUtils.showErrorModalDefault(message, 'addon.mod_survey.cannotsubmitsurvey', true);
             }).finally(() => {
                 modal.dismiss();
             });
+        }).catch((message) => {
+            this.domUtils.showErrorModalDefault(message, 'addon.mod_survey.cannotsubmitsurvey', true);
         });
     }
 

src/components/file/file.ts

@@ -158,14 +158,17 @@ export class CoreFileComponent implements OnInit, OnDestroy {
             promise = this.fileSize ? this.domUtils.confirmDownloadSize({ size: this.fileSize, total: true }) : Promise.resolve();
             promise.then(() => {
                 // User confirmed, add the file to queue.
-                this.filepoolProvider.invalidateFileByUrl(this.siteId, this.fileUrl).finally(() => {
+                return this.filepoolProvider.invalidateFileByUrl(this.siteId, this.fileUrl).finally(() => {
                     this.isDownloading = true;
+
                     this.filepoolProvider.addToQueueByUrl(this.siteId, this.fileUrl, this.component,
                         this.componentId, this.timemodified, undefined, undefined, 0, this.file).catch((error) => {
                             this.domUtils.showErrorModalDefault(error, 'core.errordownloading', true);
                             this.calculateState();
                         });
                 });
+            }).catch(() => {
+                // Ignore error.
             });
         }
     }

src/components/local-file/local-file.ts

@@ -171,15 +171,14 @@ export class CoreLocalFileComponent implements OnInit {
         // Ask confirmation.
         this.domUtils.showConfirm(this.translate.instant('core.confirmdeletefile')).then(() => {
             const modal = this.domUtils.showModalLoading();
-            this.fileProvider.removeFile(this.relativePath).then(() => {
+
+            return this.fileProvider.removeFile(this.relativePath).then(() => {
                 this.onDelete.emit();
-            }).catch(() => {
-                this.domUtils.showErrorModal('core.errordeletefile', true);
             }).finally(() => {
                 modal.dismiss();
             });
         }).catch(() => {
-            // User cancelled.
+            this.domUtils.showErrorModal('core.errordeletefile', true);
         });
     }
 }

src/core/contentlinks/providers/helper.ts

@@ -233,6 +233,8 @@ export class CoreContentLinksHelperProvider {
                         } else {
                             this.goToChooseSite(url);
                         }
+                    }).catch(() => {
+                        // User canceled.
                     });
                 }
 

src/core/course/pages/section/section.ts

@@ -283,18 +283,18 @@ export class CoreCourseSectionPage implements OnDestroy {
      */
     prefetchCourse(): void {
         this.courseHelper.confirmAndPrefetchCourse(this.prefetchCourseData, this.course, this.sections, this.courseHandlers)
-            .then((downloaded) => {
-                if (downloaded && this.downloadEnabled) {
-                    // Recalculate the status.
-                    this.courseHelper.calculateSectionsStatus(this.sections, this.course.id).catch(() => {
-                        // Ignore errors (shouldn't happen).
-                    });
-                }
-            }).catch((error) => {
-                if (!this.isDestroyed) {
-                    this.domUtils.showErrorModalDefault(error, 'core.course.errordownloadingcourse', true);
-                }
-            });
+                .then(() => {
+            if (this.downloadEnabled) {
+                // Recalculate the status.
+                this.courseHelper.calculateSectionsStatus(this.sections, this.course.id).catch(() => {
+                    // Ignore errors (shouldn't happen).
+                });
+            }
+        }).catch((error) => {
+            if (!this.isDestroyed) {
+                this.domUtils.showErrorModalDefault(error, 'core.course.errordownloadingcourse', true);
+            }
+        });
     }
 
     /**

src/core/course/providers/helper.ts

@@ -249,8 +249,7 @@ export class CoreCourseHelperProvider {
      * @param {any} course Course to prefetch.
      * @param {any[]} [sections] List of course sections.
      * @param {CoreCourseOptionsHandlerToDisplay[]} courseHandlers List of course handlers.
-     * @return {Promise<boolean>} Promise resolved with true when the download finishes, resolved with false if user doesn't
-     *                            confirm, rejected if an error occurs.
+     * @return {Promise<boolean>} Promise resolved when the download finishes, rejected if an error occurs or the user cancels.
      */
     confirmAndPrefetchCourse(iconData: any, course: any, sections?: any[], courseHandlers?: CoreCourseOptionsHandlerToDisplay[])
             : Promise<boolean> {
@@ -288,11 +287,8 @@ export class CoreCourseHelperProvider {
             }, (error): any => {
                 // User cancelled or there was an error calculating the size.
                 iconData.prefetchCourseIcon = initialIcon;
-                if (error) {
-                    return Promise.reject(error);
-                }
 
-                return false;
+                return Promise.reject(error);
             });
         });
     }
@@ -302,9 +298,9 @@ export class CoreCourseHelperProvider {
      *
      * @param {any[]} courses List of courses to download.
      * @param {Function} [onProgress] Function to call everytime a course is downloaded.
-     * @return {Promise<boolean>} Resolved with true when downloaded, resolved with false if user cancels, rejected if error.
+     * @return {Promise<boolean>} Resolved when downloaded, rejected if error or canceled.
      */
-    confirmAndPrefetchCourses(courses: any[], onProgress?: (data: CoreCourseCoursesProgress) => void): Promise<boolean> {
+    confirmAndPrefetchCourses(courses: any[], onProgress?: (data: CoreCourseCoursesProgress) => void): Promise<any> {
         const siteId = this.sitesProvider.getCurrentSiteId();
 
         // Confirm the download without checking size because it could take a while.
@@ -347,12 +343,7 @@ export class CoreCourseHelperProvider {
                 onProgress({ count: 0, total: total, success: true });
             }
 
-            return this.utils.allPromises(promises).then(() => {
-                return true;
-            });
-        }, () => {
-            // User cancelled.
-            return false;
+            return this.utils.allPromises(promises);
         });
     }
 
@@ -426,23 +417,18 @@ export class CoreCourseHelperProvider {
      */
     contextMenuPrefetch(instance: any, module: any, courseId: number): Promise<any> {
         const initialIcon = instance.prefetchStatusIcon;
-        let cancelled = false;
 
         instance.prefetchStatusIcon = 'spinner'; // Show spinner since this operation might take a while.
 
         // We need to call getDownloadSize, the package might have been updated.
         return this.prefetchDelegate.getModuleDownloadSize(module, courseId, true).then((size) => {
-            return this.domUtils.confirmDownloadSize(size).catch(() => {
-                // User hasn't confirmed, stop.
-                cancelled = true;
-
-                return Promise.reject(null);
-            }).then(() => {
+            return this.domUtils.confirmDownloadSize(size).then(() => {
                 return this.prefetchDelegate.prefetchModule(module, courseId, true);
             });
         }).catch((error) => {
             instance.prefetchStatusIcon = initialIcon;
-            if (!instance.isDestroyed && !cancelled) {
+
+            if (!instance.isDestroyed) {
                 this.domUtils.showErrorModalDefault(error, 'core.errordownloading', true);
             }
         });
@@ -979,36 +965,37 @@ export class CoreCourseHelperProvider {
 
         // First of all, mark the course as being downloaded.
         this.courseDwnPromises[siteId][course.id] = this.courseProvider.setCourseStatus(course.id, CoreConstants.DOWNLOADING,
-            siteId).then(() => {
-                const promises = [];
-                let allSectionsSection = sections[0];
+                siteId).then(() => {
 
-                // Prefetch all the sections. If the first section is "All sections", use it. Otherwise, use a fake "All sections".
-                if (sections[0].id != CoreCourseProvider.ALL_SECTIONS_ID) {
-                    allSectionsSection = { id: CoreCourseProvider.ALL_SECTIONS_ID };
+            const promises = [];
+            let allSectionsSection = sections[0];
+
+            // Prefetch all the sections. If the first section is "All sections", use it. Otherwise, use a fake "All sections".
+            if (sections[0].id != CoreCourseProvider.ALL_SECTIONS_ID) {
+                allSectionsSection = { id: CoreCourseProvider.ALL_SECTIONS_ID };
+            }
+            promises.push(this.prefetchSection(allSectionsSection, course.id, sections));
+
+            // Prefetch course options.
+            courseHandlers.forEach((handler) => {
+                if (handler.prefetch) {
+                    promises.push(handler.prefetch(course));
                 }
-                promises.push(this.prefetchSection(allSectionsSection, course.id, sections));
-
-                // Prefetch course options.
-                courseHandlers.forEach((handler) => {
-                    if (handler.prefetch) {
-                        promises.push(handler.prefetch(course));
-                    }
-                });
-
-                return this.utils.allPromises(promises);
-            }).then(() => {
-                // Download success, mark the course as downloaded.
-                return this.courseProvider.setCourseStatus(course.id, CoreConstants.DOWNLOADED, siteId);
-            }).catch((error) => {
-                // Error, restore previous status.
-                return this.courseProvider.setCoursePreviousStatus(course.id, siteId).then(() => {
-                    return Promise.reject(error);
-                });
-            }).finally(() => {
-                delete this.courseDwnPromises[siteId][course.id];
             });
 
+            return this.utils.allPromises(promises);
+        }).then(() => {
+            // Download success, mark the course as downloaded.
+            return this.courseProvider.setCourseStatus(course.id, CoreConstants.DOWNLOADED, siteId);
+        }).catch((error) => {
+            // Error, restore previous status.
+            return this.courseProvider.setCoursePreviousStatus(course.id, siteId).then(() => {
+                return Promise.reject(error);
+            });
+        }).finally(() => {
+            delete this.courseDwnPromises[siteId][course.id];
+        });
+
         return this.courseDwnPromises[siteId][course.id];
     }
 

src/core/courses/pages/my-courses/my-courses.ts

@@ -160,9 +160,9 @@ export class CoreCoursesMyCoursesPage implements OnDestroy {
 
         return this.courseHelper.confirmAndPrefetchCourses(this.courses, (progress) => {
             this.prefetchCoursesData.badge = progress.count + ' / ' + progress.total;
-        }).then((downloaded) => {
-            this.prefetchCoursesData.icon = downloaded ? 'ion-android-refresh' : initialIcon;
-        }, (error) => {
+        }).then(() => {
+            this.prefetchCoursesData.icon = 'ion-android-refresh';
+        }).catch((error) => {
             if (!this.isDestroyed) {
                 this.domUtils.showErrorModalDefault(error, 'core.course.errordownloadingcourse', true);
                 this.prefetchCoursesData.icon = initialIcon;

src/core/courses/pages/my-overview/my-overview.ts

@@ -362,9 +362,9 @@ export class CoreCoursesMyOverviewPage implements OnDestroy {
 
         return this.courseHelper.confirmAndPrefetchCourses(this.courses[selected], (progress) => {
             selectedData.badge = progress.count + ' / ' + progress.total;
-        }).then((downloaded) => {
-            selectedData.icon = downloaded ? 'refresh' : initialIcon;
-        }, (error) => {
+        }).then(() => {
+            selectedData.icon = 'refresh';
+        }).catch((error) => {
             if (!this.isDestroyed) {
                 this.domUtils.showErrorModalDefault(error, 'core.course.errordownloadingcourse', true);
                 selectedData.icon = initialIcon;

src/core/login/providers/helper.ts

@@ -235,7 +235,7 @@ export class CoreLoginHelperProvider {
 
         promise.then(() => {
             this.openBrowserForSSOLogin(siteUrl, typeOfLogin, service, launchUrl);
-        }, () => {
+        }).catch(() => {
             // User cancelled, ignore.
         });
     }

src/providers/utils/dom.ts

@@ -139,6 +139,15 @@ export class CoreDomUtilsProvider {
         return Promise.resolve();
     }
 
+    /**
+     * Create a "cancelled" error. These errors won't display an error message in showErrorModal functions.
+     *
+     * @return {any} The error object.
+     */
+    createCanceledError(): any {
+        return {coreCanceled: true};
+    }
+
     /**
      * Extract the downloadable URLs from an HTML code.
      *
@@ -771,7 +780,7 @@ export class CoreDomUtilsProvider {
      * @param {string} [okText] Text of the OK button.
      * @param {string} [cancelText] Text of the Cancel button.
      * @param {any} [options] More options. See https://ionicframework.com/docs/api/components/alert/AlertController/
-     * @return {Promise<void>} Promise resolved if the user confirms and rejected if he cancels.
+     * @return {Promise<void>} Promise resolved if the user confirms and rejected with a canceled error if he cancels.
      */
     showConfirm(message: string, title?: string, okText?: string, cancelText?: string, options?: any): Promise<void> {
         return new Promise<void>((resolve, reject): void => {
@@ -787,7 +796,7 @@ export class CoreDomUtilsProvider {
                     text: cancelText || this.translate.instant('core.cancel'),
                     role: 'cancel',
                     handler: (): void => {
-                        reject();
+                        reject(this.createCanceledError());
                     }
                 },
                 {
@@ -813,7 +822,10 @@ export class CoreDomUtilsProvider {
     showErrorModal(error: any, needsTranslate?: boolean, autocloseTime?: number): Alert {
         if (typeof error == 'object') {
             // We received an object instead of a string. Search for common properties.
-            if (typeof error.content != 'undefined') {
+            if (error.coreCanceled) {
+                // It's a canceled error, don't display an error.
+                return;
+            } else if (typeof error.content != 'undefined') {
                 error = error.content;
             } else if (typeof error.body != 'undefined') {
                 error = error.body;
@@ -833,6 +845,11 @@ export class CoreDomUtilsProvider {
             }
         }
 
+        if (error == CoreConstants.DONT_SHOW_ERROR) {
+            // The error shouldn't be shown, stop.
+            return;
+        }
+
         const message = this.textUtils.decodeHTML(needsTranslate ? this.translate.instant(error) : error);
 
         return this.showAlert(this.getErrorTitle(message), message, undefined, autocloseTime);
@@ -848,14 +865,18 @@ export class CoreDomUtilsProvider {
      * @return {Alert} The alert modal.
      */
     showErrorModalDefault(error: any, defaultError: any, needsTranslate?: boolean, autocloseTime?: number): Alert {
-        if (error != CoreConstants.DONT_SHOW_ERROR) {
-            if (error && typeof error != 'string') {
-                error = error.message || error.error;
-            }
-            error = typeof error == 'string' ? error : defaultError;
-
-            return this.showErrorModal(error, needsTranslate, autocloseTime);
+        if (error && error.coreCanceled) {
+            // It's a canceled error, don't display an error.
+            return;
         }
+
+        if (error && typeof error != 'string') {
+            error = error.message || error.error || error.content || error.body;
+        }
+
+        error = typeof error == 'string' ? error : defaultError;
+
+        return this.showErrorModal(error, needsTranslate, autocloseTime);
     }
 
     /**