120 lines
3.1 KiB
TypeScript
120 lines
3.1 KiB
TypeScript
import * as plugins from './smartdata.plugins'
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import { Db } from './smartdata.classes.db'
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import { DbDoc } from './smartdata.classes.dbdoc'
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// RethinkDb Interfaces
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import { WriteResult, Cursor } from 'rethinkdb'
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export interface IFindOptions {
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limit?: number
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}
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export interface IDocValidation<T> {
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(doc: T): boolean
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}
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export function Collection (db: Db) {
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return function (constructor) {
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constructor[ 'dbCollection' ] = new DbTable(constructor, db)
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}
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}
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export class DbTable<T> {
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/**
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* the collection that is used, defaults to mongodb collection,
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* can be nedb datastore (sub api of mongodb)
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*/
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table: plugins.rethinkDb.Table
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objectValidation: IDocValidation<T> = null
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tableName: string
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db: Db
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constructor (collectedClassArg: T & DbDoc<T>, dbArg: Db) {
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// tell the collection where it belongs
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this.tableName = collectedClassArg.name
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this.db = dbArg
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// tell the db class about it (important since Db uses different systems under the hood)
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this.db.addTable(this)
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}
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async init() {
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if(!this.table) {
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// connect this instance to a RethinkDB table
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const availableTables = await plugins.rethinkDb
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.db(this.db.dbName)
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.tableList()
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.run(this.db.dbConnection)
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if(availableTables.indexOf(this.tableName)) {
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await plugins.rethinkDb
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.db(this.db.dbName)
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.tableCreate(this.tableName)
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.run(this.db.dbConnection)
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}
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}
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this.table = plugins.rethinkDb.table(this.tableName)
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}
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/**
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* adds a validation function that all newly inserted and updated objects have to pass
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*/
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addDocValidation (funcArg: IDocValidation<T>) {
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this.objectValidation = funcArg
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}
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/**
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* finds an object in the DbCollection
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*/
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async find (): Promise<Cursor> {
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await this.init()
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return await plugins.rethinkDb.table(this.tableName).filter({
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/* TODO: */
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}).run(this.db.dbConnection)
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}
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/**
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* create an object in the database
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*/
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async insert (dbDocArg: T & DbDoc<T>): Promise<WriteResult> {
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await this.init()
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await this.checkDoc(dbDocArg)
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return await plugins.rethinkDb.table(this.tableName).insert(
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dbDocArg.createSavableObject()
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).run(this.db.dbConnection)
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}
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/**
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* inserts object into the DbCollection
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*/
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async update (dbDocArg: T & DbDoc<T>): Promise<WriteResult> {
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await this.init()
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await this.checkDoc(dbDocArg)
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console.log(this.tableName, dbDocArg.createSavableObject())
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return await plugins.rethinkDb.table(this.tableName).update(
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dbDocArg.createSavableObject()
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).run(this.db.dbConnection)
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}
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/**
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* checks a Doc for constraints
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* if this.objectValidation is not set it passes.
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*/
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private checkDoc (docArg: T): Promise<void> {
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let done = plugins.smartq.defer<void>()
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let validationResult = true
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if (this.objectValidation) {
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validationResult = this.objectValidation(docArg)
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}
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if (validationResult) {
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done.resolve()
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} else {
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done.reject('validation of object did not pass')
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}
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return done.promise
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}
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extractKey (writeResult: WriteResult) {
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}
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}
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