added attributes to frontend entity model

src/entities/note.js

@@ -369,6 +369,16 @@ class Note extends Entity {
      */
     async getRelationValue(name) { return await this.getAttributeValue(RELATION, name); }
 
+    /**
+     * @param {string} name
+     * @returns {Promise<Note>|null} target note of the relation or null (if target is empty or note was not found)
+     */
+    async getRelationTarget(name) {
+        const relation = await this.getRelation(name);
+
+        return relation ? await repository.getNote(relation.value) : null;
+    }
+
     /**
      * Based on enabled, label is either set or removed.
      *
@@ -425,16 +435,6 @@ class Note extends Entity {
      */
     async removeRelation(name, value) { return await this.removeAttribute(RELATION, name, value); }
 
-    /**
-     * @param {string} name
-     * @returns {Promise<Note>|null} target note of the relation or null (if target is empty or note was not found)
-     */
-    async getRelationTarget(name) {
-        const relation = await this.getRelation(name);
-
-        return relation ? await repository.getNote(relation.value) : null;
-    }
-
     /**
      * @return {Promise<string[]>} return list of all descendant noteIds of this note. Returning just noteIds because number of notes can be huge. Includes also this note's noteId
      */

src/public/javascripts/entities/attribute.js

@@ -0,0 +1,34 @@
+class Attribute {
+    constructor(treeCache, row) {
+        this.treeCache = treeCache;
+        /** @param {string} attributeId */
+        this.attributeId = row.attributeId;
+        /** @param {string} noteId */
+        this.noteId = row.noteId;
+        /** @param {string} type */
+        this.type = row.type;
+        /** @param {string} name */
+        this.name = row.name;
+        /** @param {string} value */
+        this.value = row.value;
+        /** @param {int} position */
+        this.position = row.position;
+        /** @param {boolean} isInheritable */
+        this.isInheritable = row.isInheritable;
+        /** @param {boolean} isDeleted */
+        this.isDeleted = row.isDeleted;
+        /** @param {string} dateCreated */
+        this.dateCreated = row.dateCreated;
+        /** @param {string} dateModified */
+        this.dateModified = row.dateModified;
+    }
+
+    /** @returns {NoteShort} */
+    async getNote() {
+        return await this.treeCache.getNote(this.noteId);
+    }
+
+    get toString() {
+        return `Attribute(attributeId=${this.attributeId}, type=${this.type}, name=${this.name})`;
+    }
+}

src/public/javascripts/entities/note_short.js

@@ -1,3 +1,10 @@
+import server from '../services/server.js';
+
+const LABEL = 'label';
+const LABEL_DEFINITION = 'label-definition';
+const RELATION = 'relation';
+const RELATION_DEFINITION = 'relation-definition';
+
 /**
  * This note's representation is used in note tree and is kept in TreeCache.
  * Its notable omission is the note content.
@@ -71,6 +78,140 @@ class NoteShort {
         return await this.treeCache.getNotes(this.getChildNoteIds());
     }
 
+    /**
+     * @param {string} [name] - attribute name to filter
+     * @returns {Promise<Attribute[]>}
+     */
+    async getAttributes(name) {
+        if (!this.attributeCache) {
+            this.attributeCache = await server.get('notes/' + this.noteId + '/attributes');
+        }
+
+        if (name) {
+            return this.attributeCache.filter(attr => attr.name === name);
+        }
+        else {
+            return this.attributeCache;
+        }
+    }
+
+    /**
+     * @param {string} [name] - label name to filter
+     * @returns {Promise<Attribute[]>} all note's labels (attributes with type label), including inherited ones
+     */
+    async getLabels(name) {
+        return (await this.getAttributes(name)).filter(attr => attr.type === LABEL);
+    }
+
+    /**
+     * @param {string} [name] - label name to filter
+     * @returns {Promise<Attribute[]>} all note's label definitions, including inherited ones
+     */
+    async getLabelDefinitions(name) {
+        return (await this.getAttributes(name)).filter(attr => attr.type === LABEL_DEFINITION);
+    }
+
+    /**
+     * @param {string} [name] - relation name to filter
+     * @returns {Promise<Attribute[]>} all note's relations (attributes with type relation), including inherited ones
+     */
+    async getRelations(name) {
+        return (await this.getAttributes(name)).filter(attr => attr.type === RELATION);
+    }
+
+    /**
+     * @param {string} [name] - relation name to filter
+     * @returns {Promise<Attribute[]>} all note's relation definitions including inherited ones
+     */
+    async getRelationDefinitions(name) {
+        return (await this.getAttributes(name)).filter(attr => attr.type === RELATION_DEFINITION);
+    }
+
+    /**
+     * @param {string} type - attribute type (label, relation, etc.)
+     * @param {string} name - attribute name
+     * @returns {Promise<boolean>} true if note has an attribute with given type and name (including inherited)
+     */
+    async hasAttribute(type, name) {
+        return !!await this.getAttribute(type, name);
+    }
+
+    /**
+     * @param {string} type - attribute type (label, relation, etc.)
+     * @param {string} name - attribute name
+     * @returns {Promise<Attribute>} attribute of given type and name. If there's more such attributes, first is  returned. Returns null if there's no such attribute belonging to this note.
+     */
+    async getAttribute(type, name) {
+        const attributes = await this.getAttributes();
+
+        return attributes.find(attr => attr.type === type && attr.name === name);
+    }
+
+    /**
+     * @param {string} type - attribute type (label, relation, etc.)
+     * @param {string} name - attribute name
+     * @returns {Promise<string>} attribute value of given type and name or null if no such attribute exists.
+     */
+    async getAttributeValue(type, name) {
+        const attr = await this.getAttribute(type, name);
+
+        return attr ? attr.value : null;
+    }
+
+    /**
+     * @param {string} name - label name
+     * @returns {Promise<boolean>} true if label exists (including inherited)
+     */
+    async hasLabel(name) { return await this.hasAttribute(LABEL, name); }
+
+    /**
+     * @param {string} name - relation name
+     * @returns {Promise<boolean>} true if relation exists (including inherited)
+     */
+    async hasRelation(name) { return await this.hasAttribute(RELATION, name); }
+
+    /**
+     * @param {string} name - label name
+     * @returns {Promise<Attribute>} label if it exists, null otherwise
+     */
+    async getLabel(name) { return await this.getAttribute(LABEL, name); }
+
+    /**
+     * @param {string} name - relation name
+     * @returns {Promise<Attribute>} relation if it exists, null otherwise
+     */
+    async getRelation(name) { return await this.getAttribute(RELATION, name); }
+
+    /**
+     * @param {string} name - label name
+     * @returns {Promise<string>} label value if label exists, null otherwise
+     */
+    async getLabelValue(name) { return await this.getAttributeValue(LABEL, name); }
+
+    /**
+     * @param {string} name - relation name
+     * @returns {Promise<string>} relation value if relation exists, null otherwise
+     */
+    async getRelationValue(name) { return await this.getAttributeValue(RELATION, name); }
+
+    /**
+     * @param {string} name
+     * @returns {Promise<Note>|null} target note of the relation or null (if target is empty or note was not found)
+     */
+    async getRelationTarget(name) {
+        const relation = await this.getRelation(name);
+
+        return relation ? await repository.getNote(relation.value) : null;
+    }
+
+    /**
+     * Clear note's attributes cache to force fresh reload for next attribute request.
+     * Cache is note instance scoped.
+     */
+    invalidateAttributeCache() {
+        this.attributeCache = null;
+    }
+
     get toString() {
         return `Note(noteId=${this.noteId}, title=${this.title})`;
     }
@@ -79,6 +220,7 @@ class NoteShort {
         const dto = Object.assign({}, this);
         delete dto.treeCache;
         delete dto.archived;
+        delete dto.attributeCache;
 
         return dto;
     }