becca entities enriched with functionality from repository entities

.idea/dataSources.xml

@@ -1,11 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
-    <data-source source="LOCAL" name="document.db" uuid="4e69c96a-8a2b-43f5-9b40-d1608f75f7a4">
+    <data-source source="LOCAL" name="SQLite - document.db" uuid="30cef30d-e704-484d-a4ca-5d3bfc2ece63">
       <driver-ref>sqlite.xerial</driver-ref>
       <synchronize>true</synchronize>
       <jdbc-driver>org.sqlite.JDBC</jdbc-driver>
-      <jdbc-url>jdbc:sqlite:$USER_HOME$/trilium-data/document.db</jdbc-url>
+      <jdbc-url>jdbc:sqlite:$PROJECT_DIR$/../trilium-data/document.db</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
     </data-source>
   </component>
 </project>

db/TODO.txt

@@ -0,0 +1,2 @@
+- drop branches.utcDateCreated - not used for anything
+- drop options.utcDateCreated - not used for anything

src/services/becca/becca_loader.js

@@ -17,7 +17,7 @@ function load() {
     const start = Date.now();
     becca.reset();
 
-    for (const row of sql.iterateRows(`SELECT noteId, title, type, mime, isProtected, dateCreated, dateModified, utcDateCreated, utcDateModified FROM notes WHERE isDeleted = 0`, [])) {
+    for (const row of sql.iterateRows(`SELECT noteId, title, type, mime, isProtected, dateCreated, dateModified, utcDateCreated, utcDateModified FROM notes`, [])) {
         new Note(becca, row);
     }
 

src/services/becca/entities/abstract_entity.js

@@ -0,0 +1,43 @@
+"use strict";
+
+class AbstractEntity {
+    beforeSaving() {
+        this.generateIdIfNecessary();
+    }
+
+    generateIdIfNecessary() {
+        if (!this[this.constructor.primaryKeyName]) {
+            this[this.constructor.primaryKeyName] = utils.newEntityId();
+        }
+    }
+
+    generateHash() {
+        let contentToHash = "";
+
+        for (const propertyName of this.constructor.hashedProperties) {
+            contentToHash += "|" + this[propertyName];
+        }
+
+        return utils.hash(contentToHash).substr(0, 10);
+    }
+
+    getUtcDateChanged() {
+        return this.utcDateModified || this.utcDateCreated;
+    }
+
+    get repository() {
+        if (!repo) {
+            repo = require('../services/repository');
+        }
+
+        return repo;
+    }
+
+    save() {
+        this.repository.updateEntity(this);
+
+        return this;
+    }
+}
+
+module.exports = AbstractEntity;

src/services/becca/entities/attribute.js

@@ -1,9 +1,19 @@
 "use strict";
 
 const Note = require('./note.js');
+const AbstractEntity = require("./abstract_entity.js");
+const sql = require("../../sql.js");
+const dateUtils = require("../../date_utils.js");
+const promotedAttributeDefinitionParser = require("../../promoted_attribute_definition_parser");
+
+class Attribute extends AbstractEntity {
+    static get entityName() { return "attributes"; }
+    static get primaryKeyName() { return "attributeId"; }
+    static get hashedProperties() { return ["attributeId", "noteId", "type", "name", "value", "isInheritable"]; }
 
-class Attribute {
     constructor(becca, row) {
+        super();
+
         /** @param {Becca} */
         this.becca = becca;
         /** @param {string} */
@@ -60,13 +70,99 @@ class Attribute {
         }
     }
 
-    // for logging etc
+    /**
+     * @returns {Note|null}
+     */
+    getNote() {
+        return this.repository.getNote(this.noteId);
+    }
+
+    /**
+     * @returns {Note|null}
+     */
+    getTargetNote() {
+        if (this.type !== 'relation') {
+            throw new Error(`Attribute ${this.attributeId} is not relation`);
+        }
+
+        if (!this.value) {
+            return null;
+        }
+
+        return this.repository.getNote(this.value);
+    }
+
+    /**
+     * @return {boolean}
+     */
+    isDefinition() {
+        return this.type === 'label' && (this.name.startsWith('label:') || this.name.startsWith('relation:'));
+    }
+
+    getDefinition() {
+        return promotedAttributeDefinitionParser.parse(this.value);
+    }
+
+    getDefinedName() {
+        if (this.type === 'label' && this.name.startsWith('label:')) {
+            return this.name.substr(6);
+        } else if (this.type === 'label' && this.name.startsWith('relation:')) {
+            return this.name.substr(9);
+        } else {
+            return this.name;
+        }
+    }
+
     get pojo() {
-        const pojo = {...this};
+        return {
+            attributeId: this.attributeId,
+            noteId: this.noteId,
+            type: this.type,
+            name: this.name,
+            position: this.position,
+            value: this.value,
+            isInheritable: this.isInheritable
+        };
+    }
 
-        delete pojo.becca;
+    beforeSaving() {
+        if (!this.value) {
+            if (this.type === 'relation') {
+                throw new Error(`Cannot save relation ${this.name} since it does not target any note.`);
+            }
 
-        return pojo;
+            // null value isn't allowed
+            this.value = "";
+        }
+
+        if (this.position === undefined) {
+            this.position = 1 + sql.getValue(`SELECT COALESCE(MAX(position), 0) FROM attributes WHERE noteId = ?`, [this.noteId]);
+        }
+
+        if (!this.isInheritable) {
+            this.isInheritable = false;
+        }
+
+        if (!this.isDeleted) {
+            this.isDeleted = false;
+        }
+
+        super.beforeSaving();
+
+        this.utcDateModified = dateUtils.utcNowDateTime();
+    }
+
+    createClone(type, name, value, isInheritable) {
+        return new Attribute({
+            noteId: this.noteId,
+            type: type,
+            name: name,
+            value: value,
+            position: this.position,
+            isInheritable: isInheritable,
+            isDeleted: false,
+            utcDateModified: this.utcDateModified
+        });
     }
 }
 

src/services/becca/entities/branch.js

@@ -1,9 +1,19 @@
 "use strict";
 
 const Note = require('./note.js');
+const AbstractEntity = require("./abstract_entity.js");
+const sql = require("../../sql.js");
+const dateUtils = require("../../date_utils.js");
+
+class Branch extends AbstractEntity {
+    static get entityName() { return "branches"; }
+    static get primaryKeyName() { return "branchId"; }
+    // notePosition is not part of hash because it would produce a lot of updates in case of reordering
+    static get hashedProperties() { return ["branchId", "noteId", "parentNoteId", "prefix"]; }
 
-class Branch {
     constructor(becca, row) {
+        super();
+
         /** @param {Becca} */
         this.becca = becca;
         /** @param {string} */
@@ -55,13 +65,44 @@ class Branch {
         return this.becca.notes[this.parentNoteId];
     }
 
-    // for logging etc
     get pojo() {
-        const pojo = {...this};
+        return {
+            branchId: this.branchId,
+            noteId: this.noteId,
+            parentNoteId: this.parentNoteId,
+            prefix: this.prefix,
+            notePosition: this.notePosition,
+            isExpanded: this.isExpanded
+        };
+    }
 
-        delete pojo.becca;
+    createClone(parentNoteId, notePosition) {
+        return new Branch({
+            noteId: this.noteId,
+            parentNoteId: parentNoteId,
+            notePosition: notePosition,
+            prefix: this.prefix,
+            isExpanded: this.isExpanded
+        });
+    }
 
-        return pojo;
+    beforeSaving() {
+        if (this.notePosition === undefined || this.notePosition === null) {
+            const maxNotePos = sql.getValue('SELECT MAX(notePosition) FROM branches WHERE parentNoteId = ? AND isDeleted = 0', [this.parentNoteId]);
+            this.notePosition = maxNotePos === null ? 0 : maxNotePos + 10;
+        }
+
+        if (!this.isExpanded) {
+            this.isExpanded = false;
+        }
+
+        if (!this.branchId) {
+            this.utcDateCreated = dateUtils.utcNowDateTime();
+        }
+
+        super.beforeSaving();
+
+        this.utcDateModified = dateUtils.utcNowDateTime();
     }
 }
 

src/services/becca/entities/note.js

@@ -2,12 +2,23 @@
 
 const protectedSessionService = require('../../protected_session');
 const log = require('../../log');
+const sql = require('../../sql');
+const utils = require('../../utils');
+const dateUtils = require('../../date_utils');
+const entityChangesService = require('../../entity_changes.js');
+const AbstractEntity = require("./abstract_entity.js");
 
 const LABEL = 'label';
 const RELATION = 'relation';
 
-class Note {
+class Note extends AbstractEntity {
+    static get entityName() { return "notes"; }
+    static get primaryKeyName() { return "noteId"; }
+    static get hashedProperties() { return ["noteId", "title", "isProtected", "type", "mime"]; }
+
     constructor(becca, row) {
+        super();
+
         /** @param {Becca} */
         this.becca = becca;
 
@@ -46,10 +57,14 @@ class Note {
     }
 
     update(row) {
+        // ------ Database persisted attributes ------
+
         /** @param {string} */
         this.noteId = row.noteId;
         /** @param {string} */
         this.title = row.title;
+        /** @param {boolean} */
+        this.isProtected = !!row.isProtected;
         /** @param {string} */
         this.type = row.type;
         /** @param {string} */
@@ -62,8 +77,9 @@ class Note {
         this.utcDateCreated = row.utcDateCreated;
         /** @param {string} */
         this.utcDateModified = row.utcDateModified;
-        /** @param {boolean} */
-        this.isProtected = !!row.isProtected;
+
+        // ------ Derived attributes ------
+
         /** @param {boolean} */
         this.isDecrypted = !row.isProtected || !!row.isContentAvailable;
 
@@ -73,6 +89,162 @@ class Note {
         this.flatTextCache = null;
     }
 
+    /*
+     * Note content has quite special handling - it's not a separate entity, but a lazily loaded
+     * part of Note entity with it's own sync. Reasons behind this hybrid design has been:
+     *
+     * - content can be quite large and it's not necessary to load it / fill memory for any note access even if we don't need a content, especially for bulk operations like search
+     * - changes in the note metadata or title should not trigger note content sync (so we keep separate utcDateModified and entity changes records)
+     * - but to the user note content and title changes are one and the same - single dateModified (so all changes must go through Note and content is not a separate entity)
+     */
+
+    /** @returns {*} */
+    getContent(silentNotFoundError = false) {
+        const row = sql.getRow(`SELECT content FROM note_contents WHERE noteId = ?`, [this.noteId]);
+
+        if (!row) {
+            if (silentNotFoundError) {
+                return undefined;
+            }
+            else {
+                throw new Error("Cannot find note content for noteId=" + this.noteId);
+            }
+        }
+
+        let content = row.content;
+
+        if (this.isProtected) {
+            if (protectedSessionService.isProtectedSessionAvailable()) {
+                content = content === null ? null : protectedSessionService.decrypt(content);
+            }
+            else {
+                content = "";
+            }
+        }
+
+        if (this.isStringNote()) {
+            return content === null
+                ? ""
+                : content.toString("UTF-8");
+        }
+        else {
+            return content;
+        }
+    }
+
+    /** @returns {{contentLength, dateModified, utcDateModified}} */
+    getContentMetadata() {
+        return sql.getRow(`
+            SELECT 
+                LENGTH(content) AS contentLength, 
+                dateModified,
+                utcDateModified 
+            FROM note_contents 
+            WHERE noteId = ?`, [this.noteId]);
+    }
+
+    /** @returns {*} */
+    getJsonContent() {
+        const content = this.getContent();
+
+        if (!content || !content.trim()) {
+            return null;
+        }
+
+        return JSON.parse(content);
+    }
+
+    setContent(content) {
+        if (content === null || content === undefined) {
+            throw new Error(`Cannot set null content to note ${this.noteId}`);
+        }
+
+        if (this.isStringNote()) {
+            content = content.toString();
+        }
+        else {
+            content = Buffer.isBuffer(content) ? content : Buffer.from(content);
+        }
+
+        const pojo = {
+            noteId: this.noteId,
+            content: content,
+            dateModified: dateUtils.localNowDateTime(),
+            utcDateModified: dateUtils.utcNowDateTime()
+        };
+
+        if (this.isProtected) {
+            if (protectedSessionService.isProtectedSessionAvailable()) {
+                pojo.content = protectedSessionService.encrypt(pojo.content);
+            }
+            else {
+                throw new Error(`Cannot update content of noteId=${this.noteId} since we're out of protected session.`);
+            }
+        }
+
+        sql.upsert("note_contents", "noteId", pojo);
+
+        const hash = utils.hash(this.noteId + "|" + pojo.content.toString());
+
+        entityChangesService.addEntityChange({
+            entityName: 'note_contents',
+            entityId: this.noteId,
+            hash: hash,
+            isErased: false,
+            utcDateChanged: pojo.utcDateModified
+        }, null);
+    }
+
+    setJsonContent(content) {
+        this.setContent(JSON.stringify(content, null, '\t'));
+    }
+
+    /** @returns {boolean} true if this note is the root of the note tree. Root note has "root" noteId */
+    isRoot() {
+        return this.noteId === 'root';
+    }
+
+    /** @returns {boolean} true if this note is of application/json content type */
+    isJson() {
+        return this.mime === "application/json";
+    }
+
+    /** @returns {boolean} true if this note is JavaScript (code or attachment) */
+    isJavaScript() {
+        return (this.type === "code" || this.type === "file")
+            && (this.mime.startsWith("application/javascript")
+                || this.mime === "application/x-javascript"
+                || this.mime === "text/javascript");
+    }
+
+    /** @returns {boolean} true if this note is HTML */
+    isHtml() {
+        return ["code", "file", "render"].includes(this.type)
+            && this.mime === "text/html";
+    }
+
+    /** @returns {boolean} true if the note has string content (not binary) */
+    isStringNote() {
+        return utils.isStringNote(this.type, this.mime);
+    }
+
+    /** @returns {string|null} JS script environment - either "frontend" or "backend" */
+    getScriptEnv() {
+        if (this.isHtml() || (this.isJavaScript() && this.mime.endsWith('env=frontend'))) {
+            return "frontend";
+        }
+
+        if (this.type === 'render') {
+            return "frontend";
+        }
+
+        if (this.isJavaScript() && this.mime.endsWith('env=backend')) {
+            return "backend";
+        }
+
+        return null;
+    }
+
     /** @return {Attribute[]} */
     get attributes() {
         return this.__getAttributes([]);
@@ -543,19 +715,45 @@ class Note {
         }
     }
 
-    // for logging etc
     get pojo() {
-        const pojo = {...this};
+        return {
+            noteId: this.noteId,
+            title: this.title,
+            isProtected: this.isProtected,
+            type: this.type,
+            mime: this.mime,
+            dateCreated: this.dateCreated,
+            dateModified: this.dateModified,
+            utcDateCreated: this.utcDateCreated,
+            utcDateModified: this.utcDateModified
+        };
+    }
 
-        delete pojo.becca;
-        delete pojo.ancestorCache;
-        delete pojo.attributeCache;
-        delete pojo.flatTextCache;
-        delete pojo.children;
-        delete pojo.parents;
-        delete pojo.parentBranches;
+    beforeSaving() {
+        if (!this.dateCreated) {
+            this.dateCreated = dateUtils.localNowDateTime();
+        }
 
-        return pojo;
+        if (!this.utcDateCreated) {
+            this.utcDateCreated = dateUtils.utcNowDateTime();
+        }
+
+        super.beforeSaving();
+
+        this.dateModified = dateUtils.localNowDateTime();
+        this.utcDateModified = dateUtils.utcNowDateTime();
+    }
+
+    updatePojo(pojo) {
+        if (pojo.isProtected) {
+            if (this.isDecrypted) {
+                pojo.title = protectedSessionService.encrypt(pojo.title);
+            }
+            else {
+                // updating protected note outside of protected session means we will keep original ciphertexts
+                delete pojo.title;
+            }
+        }
     }
 }