#20 added json.data.provider impl + refined data.provider api interface

src/data.providers/data.provider.ts

@@ -11,13 +11,17 @@ export interface IDataProvider {
   /**
    * Gets data format data.
    * @param dataUrl Local data file path or remote data url.
+   * @param parseFunction Optional data parse function override.
+   * @param parseOptions Optional data parsing options.
    */
-  getData(dataUrl: string): any;
+  getData(dataUrl: string, parseFunction: Function, parseOptions: any): any;
+
 
   /**
    * Saves raw Data Provider data.
    * @param filePath Data file path. 
    * @param fileData Raw data to save.
+   * @param stringifyFunction Optional stringiy function override.
    */
-  saveData(fileData: any): void;
+  saveData(filePath: string, fileData: any, stringifyFunction: Function): void;
 }

src/data.providers/json.data.provider.ts

@@ -0,0 +1,52 @@
+'use strict';
+
+// vscode imports
+import {window} from 'vscode';
+
+import * as fs from 'fs';
+import * as path from 'path';
+import * as config from '../config';
+import * as fileUtils from '../utils/file.utils';
+import * as jsonUtils from '../utils/json.utils';
+import {Logger, LogLevel} from '../logger';
+import {IDataProvider} from './data.provider';
+
+/**
+ * JSON data provider.
+ */
+export class JsonDataProvider implements IDataProvider {
+
+  private logger: Logger = new Logger('json.data.provider:', config.logLevel);
+
+  /**
+   * Gets data format data.
+   * @param dataUrl Local data file path or remote data url.
+   * @param parseFunction Optional data parse function override.
+   * @param parseOptions Optional data parsing options.
+   */
+  public getData(dataUrl: string,
+    parseFunction: Function,
+    parseOptions: any = null): any {
+    let data: any = [];
+    try {
+      const content: string = fileUtils.readDataFile(dataUrl, 'utf8');
+      data = (parseOptions) ? parseFunction(content, parseOptions) : parseFunction(content);
+    }
+    catch (error) {
+      this.logger.logMessage(LogLevel.Error,
+        `getData(): Error parsing '${dataUrl}' \n\t Error:`, error.message);
+      window.showErrorMessage(`Unable to parse data file: '${dataUrl}'. \n\t Error: ${error.message}`);
+    }
+    return jsonUtils.convertJsonData(data);
+  }
+
+  /**
+   * Saves raw Data Provider data.
+   * @param filePath Data file path. 
+   * @param fileData Raw data to save.
+   * @param stringifyFunction Optional stringiy function override.
+   */
+  public saveData(filePath: string, fileData: any, stringifyFunction: Function): void {
+    // TODO
+  }
+}