expose ability to create note revisions in backend API #2890

docs/backend_api/becca_entities_note.js.html

@@ -37,6 +37,8 @@ const entityChangesService = require('../../services/entity_changes');
 const AbstractEntity = require("./abstract_entity");
 const NoteRevision = require("./note_revision");
 const TaskContext = require("../../services/task_context.js");
+const optionService = require("../../services/options.js");
+const noteRevisionService = require("../../services/note_revisions.js");
 
 const LABEL = 'label';
 const RELATION = 'relation';
@@ -1192,6 +1194,41 @@ class Note extends AbstractEntity {
         return !(this.noteId in this.becca.notes);
     }
 
+    /**
+     * @return {NoteRevision|null}
+     */
+    saveNoteRevision() {
+        const content = this.getContent();
+
+        if (!content || (Buffer.isBuffer(content) && content.byteLength === 0)) {
+            return null;
+        }
+
+        const contentMetadata = this.getContentMetadata();
+
+        const noteRevision = new NoteRevision({
+            noteId: this.noteId,
+            // title and text should be decrypted now
+            title: this.title,
+            type: this.type,
+            mime: this.mime,
+            isProtected: false, // will be fixed in the protectNoteRevisions() call
+            utcDateLastEdited: this.utcDateModified > contentMetadata.utcDateModified
+                ? this.utcDateModified
+                : contentMetadata.utcDateModified,
+            utcDateCreated: dateUtils.utcNowDateTime(),
+            utcDateModified: dateUtils.utcNowDateTime(),
+            dateLastEdited: this.dateModified > contentMetadata.dateModified
+                ? this.dateModified
+                : contentMetadata.dateModified,
+            dateCreated: dateUtils.localNowDateTime()
+        }).save();
+
+        noteRevision.setContent(content);
+
+        return noteRevision;
+    }
+
     beforeSaving() {
         super.beforeSaving();