Issue Sunbird-inQuiry#42 feat: Added an interface for match the follo…

…wing type question

projects/questionset-editor-library/src/lib/interfaces/MtfForm.ts

@@ -0,0 +1,56 @@
+import * as _ from "lodash-es";
+
+export class MtfOption {
+  constructor(public leftOption: string, public rightOption: string) {}
+}
+
+export interface MtfData {
+  question: string;
+  options: Array<MtfOption>;
+  answer?: object;
+  learningOutcome?: string;
+  complexityLevel?: string;
+  maxScore?: number;
+}
+
+export interface MtfConfig {
+  templateId?: string;
+  numberOfOptions?: number;
+  maximumOptions?: number;
+
+}
+
+export class MtfForm {
+  public question: string;
+  public options: Array<MtfOption>;
+  public templateId: string;
+  public answer: object;
+  public learningOutcome?: string;
+  public complexityLevel?: string;
+  public maxScore?: number;
+  public maximumOptions;
+  public numberOfOptions;
+
+  constructor({question, options, answer, learningOutcome, complexityLevel, maxScore,}: MtfData,{ templateId, numberOfOptions, maximumOptions }: MtfConfig) {
+    this.question = question;
+    this.options = options || [];
+    this.templateId = templateId;
+    this.answer = answer || {};
+    this.learningOutcome = learningOutcome;
+    this.complexityLevel = complexityLevel;
+    this.numberOfOptions = numberOfOptions || 2;
+    this.maximumOptions = maximumOptions || 4;
+    this.maxScore = maxScore;
+    if (!this.options || !this.options.length) {
+      _.times(this.numberOfOptions, index => this.options.push(new MtfOption("","")));
+    }
+  }
+
+  addOptions() {
+    this.options.push(new MtfOption("", ""));
+  }
+
+  deleteOptions(position: number) {
+    this.options.splice(position, 1);
+  }
+}