Vmeda.Online/src/providers/update-manager.ts

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// (C) Copyright 2015 Moodle Pty Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import { Injectable } from '@angular/core';
import { CoreConfigProvider } from './config';
import { CoreInitHandler, CoreInitDelegate } from './init';
import { CoreLoggerProvider } from './logger';
import { CoreConfigConstants } from '../configconstants';
/**
* Factory to handle app updates. This factory shouldn't be used outside of core.
*
* This service handles processes that need to be run when updating the app, like migrate Ionic 1 database data to Ionic 3.
*/
@Injectable()
export class CoreUpdateManagerProvider implements CoreInitHandler {
// Data for init delegate.
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name = 'CoreUpdateManager';
priority = CoreInitDelegate.MAX_RECOMMENDED_PRIORITY + 300;
blocking = true;
protected VERSION_APPLIED = 'version_applied';
protected logger;
constructor(logger: CoreLoggerProvider, private configProvider: CoreConfigProvider) {
this.logger = logger.getInstance('CoreUpdateManagerProvider');
}
/**
* Check if the app has been updated and performs the needed processes.
* This function shouldn't be used outside of core.
*
* @return Promise resolved when the update process finishes.
*/
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load(): Promise<any> {
const promises = [],
versionCode = CoreConfigConstants.versioncode;
return this.configProvider.get(this.VERSION_APPLIED, 0).then((versionApplied: number) => {
// Put here the code to treat app updates.
return Promise.all(promises).then(() => {
return this.configProvider.set(this.VERSION_APPLIED, versionCode);
}).catch((error) => {
this.logger.error(`Error applying update from ${versionApplied} to ${versionCode}`, error);
});
});
}
}