ionic-database-builder
Version:
Extended library from database-builder to assist in creating and maintaining SQL commands. Allowing integrate execute commands with SQLite ('@ionic-native/sqlite'), Web Sql, etc. Through the interface injection 'DatabaseCreatorContract' returning an imple
91 lines • 14.4 kB
JavaScript
import * as momentNs from 'moment';
const moment = momentNs;
import { Observable } from 'rxjs';
export class DatabaseMigrationBase {
version(database, version) {
return new Observable((observer) => {
this.checkTableVersion(database)
.subscribe(_ => {
this.checkVersion(database, version)
.subscribe((result) => {
this.migration(database, result)
.subscribe(r => {
observer.next(r);
observer.complete();
}, err => this.error(err, observer));
}, err => this.error(err, observer));
}, err => this.error(err, observer));
});
}
error(error, observer) {
// tslint:disable-next-line:no-console
console.error(error);
observer.error(error);
observer.complete();
}
checkTableVersion(database) {
return new Observable((observer) => {
// return new Promise<any>((resolve, reject) => {
const scriptTableVersion = `CREATE TABLE IF NOT EXISTS MigrationVersion(
id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT
, data INTEGER
, version TEXT
);`;
database.executeSql(scriptTableVersion, {})
.then(result => {
observer.next(result);
observer.complete();
}, err => this.error(err, observer));
});
}
checkVersion(database, newVersion) {
return new Observable((observer) => {
this.getVersion(database).subscribe((oldVersion) => {
if (oldVersion > 0) {
if (newVersion > oldVersion) {
// tslint:disable-next-line:no-console
console.info(`Version old: ${oldVersion}`);
database.executeSql(`UPDATE MigrationVersion
SET (data, version) = (?, ?);`, [moment().unix(), newVersion])
.then()
.catch(err => this.error(err, observer));
}
}
else {
database.executeSql(`INSERT INTO MigrationVersion (data, version) VALUES (?, ?)`, [moment().unix(), newVersion])
.then()
.catch(err => this.error(err, observer));
}
observer.next({
oldVersion,
newVersion
});
observer.complete();
});
});
}
getVersion(database) {
return new Observable((observer) => {
database.executeSql(`SELECT * FROM MigrationVersion`, {})
.then((result) => {
let version = 0;
if (result.rows.length > 0) {
version = Number.parseFloat(result.rows.item(0).version);
}
observer.next(version);
observer.complete();
})
.catch(err => this.error(err, observer));
});
}
migration(database, control) {
return new Observable((observer) => {
this.migrationExecute(database, control)
.subscribe(result => {
observer.next(result);
observer.complete();
}, err => this.error(err, observer));
});
}
}
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newVersion: number; }) => {\r\n                            this.migration(database, result)\r\n                                .subscribe(r => {\r\n                                    observer.next(r);\r\n                                    observer.complete();\r\n                                }, err => this.error(err, observer));\r\n                        }, err => this.error(err, observer));\r\n                }, err => this.error(err, observer));\r\n        });\r\n    }\r\n\r\n    protected error(error: string, observer: Observer<any>) {\r\n        // tslint:disable-next-line:no-console\r\n        console.error(error);\r\n        observer.error(error);\r\n        observer.complete();\r\n    }\r\n\r\n    protected abstract migrationExecute(\r\n        database: DatabaseObject, control: { oldVersion: number, newVersion: number }\r\n    ): Observable<boolean>;\r\n\r\n    private checkTableVersion(database: DatabaseObject): Observable<any> {\r\n        return new Observable((observer: Observer<any>) => {\r\n            // return new Promise<any>((resolve, reject) => {\r\n            const scriptTableVersion = `CREATE TABLE IF NOT EXISTS MigrationVersion(\r\n                    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT\r\n                    , data INTEGER\r\n                    , version TEXT\r\n                    );`;\r\n            database.executeSql(scriptTableVersion, {})\r\n                .then(result => {\r\n                    observer.next(result);\r\n                    observer.complete();\r\n                }, err => this.error(err, observer));\r\n        });\r\n    }\r\n\r\n    private checkVersion(database: DatabaseObject, newVersion: number): Observable<{ oldVersion: number, newVersion: number }> {\r\n        return new Observable((observer: Observer<any>) => {\r\n            this.getVersion(database).subscribe((oldVersion: number) => {\r\n                if (oldVersion > 0) {\r\n                    if (newVersion > oldVersion) {\r\n                        // tslint:disable-next-line:no-console\r\n                        console.info(`Version old: ${oldVersion}`);\r\n                        database.executeSql(`UPDATE MigrationVersion\r\n                                SET (data, version) = (?, ?);`,\r\n                            [moment().unix(), newVersion])\r\n                            .then()\r\n                            .catch(err => this.error(err, observer));\r\n                    }\r\n                } else {\r\n                    database.executeSql(`INSERT INTO MigrationVersion (data, version) VALUES (?, ?)`,\r\n                        [moment().unix(), newVersion])\r\n                        .then()\r\n                        .catch(err => this.error(err, observer));\r\n                }\r\n                observer.next({\r\n                    oldVersion,\r\n                    newVersion\r\n                });\r\n                observer.complete();\r\n            });\r\n        });\r\n    }\r\n\r\n    private getVersion(database: DatabaseObject): Observable<number> {\r\n        return new Observable((observer: Observer<number>) => {\r\n            database.executeSql(`SELECT * FROM MigrationVersion`, {})\r\n                .then((result) => {\r\n                    let version = 0;\r\n                    if (result.rows.length > 0) {\r\n                        version = Number.parseFloat(result.rows.item(0).version);\r\n                    }\r\n                    observer.next(version);\r\n                    observer.complete();\r\n                })\r\n                .catch(err => this.error(err, observer));\r\n        });\r\n    }\r\n\r\n    private migration(database: DatabaseObject, control: { oldVersion: number, newVersion: number }): Observable<boolean> {\r\n        return new Observable((observer: Observer<boolean>) => {\r\n            this.migrationExecute(database, control)\r\n                .subscribe(result => {\r\n                    observer.next(result);\r\n                    observer.complete();\r\n                }, err => this.error(err, observer));\r\n        });\r\n    }\r\n}\r\n"]}