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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| import { Injectable } from '@angular/core'; | ||
| import { SQLite } from 'ionic-native'; | ||
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| import { Client } from '../../common/services/api/client'; | ||
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| @Injectable() | ||
| export class MessengerViewService { | ||
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| db : SQLite; | ||
| guid : string; | ||
| offset : string = ""; | ||
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| messages : Array<any> = []; | ||
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| constructor(private client : Client){ | ||
| this.db = new SQLite(); | ||
| this.db.openDatabase({name: "minds4.db", location: "default"}) | ||
| .then(() => { | ||
| this.db.executeSql("CREATE TABLE IF NOT EXISTS messages (guid TEXT PRIMARY KEY, conversation_guid TEXT, data TEXT)", []); | ||
| }); | ||
| } | ||
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| setGuid(guid : string){ | ||
| this.guid = guid; | ||
| } | ||
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| get(limit : number = 10, offset : string = ""){ | ||
| return new Promise((resolve, reject) => { | ||
| this.getFromLocal(limit, offset) | ||
| .then((messages : Array<any>) => { | ||
| resolve(messages); | ||
| }) | ||
| .catch((err) => { | ||
| console.log('error on local fetch, will try remote'); | ||
| console.log(err); | ||
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| this.getFromRemote(limit, offset) | ||
| .then((messages : Array<any>) => { | ||
| resolve(messages); | ||
| }) | ||
| .catch((err) => { | ||
| reject(err); | ||
| }) | ||
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| }) | ||
| }); | ||
| } | ||
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| getFromLocal(limit : number, offset : string = ""){ | ||
| return new Promise((resolve, reject) => { | ||
| let request; | ||
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| if(offset){ | ||
| request = this.db.executeSql(`SELECT * FROM messages | ||
| WHERE conversation_guid = ? | ||
| AND guid < ? | ||
| ORDER BY guid ASC | ||
| LIMIT ? `, | ||
| [ this.guid, offset, limit ]) | ||
| } else { | ||
| request = this.db.executeSql(`SELECT * FROM messages | ||
| WHERE conversation_guid = ? | ||
| ORDER BY guid ASC | ||
| LIMIT ? `, | ||
| [ this.guid, limit ]) | ||
| } | ||
| request.then((data) => { | ||
| if(data.rows.length > 0) { | ||
| let messages = []; | ||
| for(var i = 0; i < data.rows.length; i++) { | ||
| messages.push(JSON.parse(data.rows.item(i).data)); | ||
| } | ||
| this.offset = messages[0].guid; | ||
| console.log('got from local :' + this.offset); | ||
| resolve(messages); | ||
|
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| } else { | ||
| reject("No results on local"); | ||
| } | ||
| }) | ||
| .catch((err) => { | ||
| reject(err); | ||
| }); | ||
| }); | ||
| } | ||
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| getFromRemote(limit : number, offset : string = ""){ | ||
| return new Promise((resolve, reject) => { | ||
| this.client.get('api/v2/conversations/' + this.guid, { | ||
| limit: 8, | ||
| offset: this.offset | ||
| }) | ||
| .then((response : any) => { | ||
| if(!response.messages){ | ||
| reject("No results on remote"); | ||
| return false; | ||
| } | ||
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| let messages = response.messages; | ||
|
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| //if(!this.offset) | ||
| this.sync(response.messages); | ||
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| this.offset = response['load-previous']; | ||
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| resolve(messages); | ||
| }) | ||
| .catch(() => { | ||
| }); | ||
| }); | ||
| } | ||
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| sync(data){ | ||
| for(let item of data){ | ||
| this.db.executeSql("INSERT OR REPLACE INTO messages (guid, conversation_guid, data) VALUES (?, ?, ?)", [ | ||
| item.guid, | ||
| this.guid, | ||
| JSON.stringify(item) | ||
| ]) | ||
| .then((success) => { | ||
| console.log('sync success'); | ||
| }) | ||
| .catch((err) => { | ||
| console.log('sync error'); | ||
| console.log(err); | ||
| }) | ||
| } | ||
| } | ||
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| } |