[835] Auto-save in new Item Submission form breaks the form

Store additions:
1. Form AdditionalData: contains the list of the touched metadata
2. Submission metadata: contains the list of the metadata ids assignable for each section

We keep also track whether a section ha focused fields or not.

src/app/submission/objects/submission-objects.actions.ts

@@ -206,6 +206,7 @@ export class UpdateSectionDataAction implements Action {
     sectionId: string;
     data: WorkspaceitemSectionDataType;
     errors: SubmissionSectionError[];
+    metadata: string[];
   };
 
   /**
@@ -219,12 +220,15 @@ export class UpdateSectionDataAction implements Action {
    *    the section's data
    * @param errors
    *    the section's errors
+   * @param metadata
+   *    the section's metadata
    */
   constructor(submissionId: string,
               sectionId: string,
               data: WorkspaceitemSectionDataType,
-              errors: SubmissionSectionError[]) {
-    this.payload = { submissionId, sectionId, data, errors };
+              errors: SubmissionSectionError[],
+              metadata?: string[]) {
+    this.payload = { submissionId, sectionId, data, errors, metadata };
   }
 }
 

src/app/submission/objects/submission-objects.effects.ts

@@ -292,7 +292,7 @@ export class SubmissionObjectEffects {
         return item$.pipe(
           map((item: Item) => item.metadata),
           filter((metadata) => !isEqual(action.payload.data, metadata)),
-          map((metadata: any) => new UpdateSectionDataAction(action.payload.submissionId, action.payload.sectionId, metadata, action.payload.errors))
+          map((metadata: any) => new UpdateSectionDataAction(action.payload.submissionId, action.payload.sectionId, metadata, action.payload.errors, action.payload.metadata))
         );
       } else {
         return observableOf(new UpdateSectionDataSuccessAction());

src/app/submission/objects/submission-objects.reducer.ts

@@ -85,6 +85,11 @@ export interface SubmissionSectionObject {
    */
   enabled: boolean;
 
+  /**
+   * The list of the metadata ids of the section.
+   */
+  metadata: string[];
+
   /**
    * The section data object
    */
@@ -660,7 +665,8 @@ function updateSectionData(state: SubmissionObjectState, action: UpdateSectionDa
           [ action.payload.sectionId ]: Object.assign({}, state[ action.payload.submissionId ].sections [ action.payload.sectionId ], {
             enabled: true,
             data: action.payload.data,
-            errors: action.payload.errors
+            errors: action.payload.errors,
+            metadata: reduceSectionMetadata(action.payload.metadata, state[ action.payload.submissionId ].sections [ action.payload.sectionId ].metadata)
           })
         })
       })
@@ -670,6 +676,22 @@ function updateSectionData(state: SubmissionObjectState, action: UpdateSectionDa
   }
 }
 
+/**
+ * Updates the state of the section metadata only when a new value is provided.
+ * Keep the existent otherwise.
+ * @param newMetadata
+ * @param oldMetadata
+ */
+function reduceSectionMetadata(newMetadata: string[], oldMetadata: string[]) {
+  if (newMetadata) {
+    return newMetadata;
+  }
+  if (oldMetadata) {
+    return [...oldMetadata];
+  }
+  return undefined;
+}
+
 /**
  * Set a section state.
  *