refactor(StudentWorkDataExportStrategy, TeacherDataService): move and simplify logic for component state retrieval

src/assets/wise5/classroomMonitor/dataExport/strategies/StudentWorkDataExportStrategy.ts

@@ -95,11 +95,10 @@ export class StudentWorkDataExportStrategy extends AbstractDataExportStrategy {
         if (this.exportType === 'allStudentWork') {
           componentStates = this.teacherDataService.getComponentStatesByWorkgroupId(workgroupId);
         } else if (this.exportType === 'latestStudentWork') {
-          this.teacherDataService.injectRevisionCounterIntoComponentStates(
+          this.injectRevisionCounterIntoComponentStates(
             this.teacherDataService.getComponentStatesByWorkgroupId(workgroupId)
           );
-          componentStates =
-            this.teacherDataService.getLatestComponentStatesByWorkgroupId(workgroupId);
+          componentStates = this.getLatestComponentStatesByWorkgroupId(workgroupId);
         }
         if (componentStates != null) {
           for (var c = 0; c < componentStates.length; c++) {
@@ -151,6 +150,40 @@ export class StudentWorkDataExportStrategy extends AbstractDataExportStrategy {
     });
   }
 
+  private injectRevisionCounterIntoComponentStates(componentStates: any[]): void {
+    const componentRevisionCounter = {};
+    componentStates.forEach((componentState) => {
+      const key = componentState.nodeId + '-' + componentState.componentId;
+      if (componentRevisionCounter[key] == null) {
+        componentRevisionCounter[key] = 1;
+      }
+      componentState.revisionCounter = componentRevisionCounter[key];
+      componentRevisionCounter[key]++;
+    });
+  }
+
+  /**
+   * @param workgroupId the workgroup id
+   * @return An array of component states. Each component state will be the latest component state
+   * for a component.
+   */
+  private getLatestComponentStatesByWorkgroupId(workgroupId: number): any[] {
+    const componentStates = [];
+    const componentsFound = {};
+    const componentStatesForWorkgroup =
+      this.teacherDataService.getComponentStatesByWorkgroupId(workgroupId);
+    for (let csb = componentStatesForWorkgroup.length - 1; csb >= 0; csb--) {
+      const componentState = componentStatesForWorkgroup[csb];
+      const key = componentState.nodeId + '-' + componentState.componentId;
+      if (componentsFound[key] == null) {
+        componentStates.push(componentState);
+        componentsFound[key] = true;
+      }
+    }
+    componentStates.reverse();
+    return componentStates;
+  }
+
   /**
    * Create the array that will be used as a row in the student work export
    * @param columnNames all the header column name

src/assets/wise5/services/teacherDataService.ts

@@ -430,44 +430,6 @@ export class TeacherDataService extends DataService {
     return getIntersectOfArrays(componentStatesByWorkgroupId, componentStatesByNodeId);
   }
 
-  /**
-   * @param workgroupId the workgroup id
-   * @return An array of component states. Each component state will be the latest component state
-   * for a component.
-   */
-  getLatestComponentStatesByWorkgroupId(workgroupId) {
-    const componentStates = [];
-    const componentsFound = {};
-    const componentStatesForWorkgroup = this.getComponentStatesByWorkgroupId(workgroupId);
-    for (let csb = componentStatesForWorkgroup.length - 1; csb >= 0; csb--) {
-      const componentState = componentStatesForWorkgroup[csb];
-      const key = this.getComponentStateNodeIdComponentIdKey(componentState);
-      if (componentsFound[key] == null) {
-        componentStates.push(componentState);
-        componentsFound[key] = true;
-      }
-    }
-    componentStates.reverse();
-    return componentStates;
-  }
-
-  injectRevisionCounterIntoComponentStates(componentStates) {
-    const componentRevisionCounter = {};
-    for (const componentState of componentStates) {
-      const key = this.getComponentStateNodeIdComponentIdKey(componentState);
-      if (componentRevisionCounter[key] == null) {
-        componentRevisionCounter[key] = 1;
-      }
-      const revisionCounter = componentRevisionCounter[key];
-      componentState.revisionCounter = revisionCounter;
-      componentRevisionCounter[key] = revisionCounter + 1;
-    }
-  }
-
-  getComponentStateNodeIdComponentIdKey(componentState) {
-    return componentState.nodeId + '-' + componentState.componentId;
-  }
-
   getComponentStatesByWorkgroupIdAndComponentId(workgroupId, componentId) {
     const componentStatesByWorkgroupId = this.getComponentStatesByWorkgroupId(workgroupId);
     const componentStatesByComponentId = this.getComponentStatesByComponentId(componentId);