Indexation of files to nodes

static/js/node_store.mjs

@@ -21,7 +21,7 @@ export class NodeStore {
 	}//}}}
 	initializeDB() {//{{{
 		return new Promise((resolve, reject) => {
-			const req = indexedDB.open('notes', 10)
+			const req = indexedDB.open('notes', 12)
 
 			// Schema upgrades for IndexedDB.
 			// These can start from different points depending on updates to Notes2 since a device was online.
@@ -31,6 +31,7 @@ export class NodeStore {
 				let sendQueue
 				let nodesHistory
 				let files
+				let filesNodelink
 				const db = event.target.result
 				const trx = event.target.transaction
 
@@ -80,6 +81,14 @@ export class NodeStore {
 						case 10:
 							trx.objectStore('files_metadata').createIndex('byUploaded', 'uploaded', { unique: false })
 							break
+
+						case 11:
+							db.createObjectStore('files_nodelink', { keyPath: 'UUID' })
+							break
+
+						case 12:
+							trx.objectStore('files_nodelink').createIndex('byNodeCount', 'NodeCount', { unique: false })
+							break
 					}
 				}
 			}
@@ -90,6 +99,7 @@ export class NodeStore {
 				this.nodesHistory = new NodeHistoryStore(this.db, 'nodes_history')
 				this.files = new SimpleNodeStore(this.db, 'files')
 				this.filesMetadata = new SimpleNodeStore(this.db, 'files_metadata')
+				this.filesNodelink = new FileNodesLinkStore(this.db, 'files_nodelink')
 				resolve()
 			}
 
@@ -231,7 +241,6 @@ export class NodeStore {
 					nodeStore = t.objectStore('nodes')
 
 					t.oncomplete = (_event) => {
-						console.log('complete')
 						resolve()
 					}
 
@@ -572,6 +581,51 @@ class NodeHistoryStore extends SimpleNodeStore {
 	}// }}}
 }
 
+class FileNodesLinkStore extends SimpleNodeStore {
+	async removeFileUUIDs(nodeUUID, fileUUIDs) {// {{{
+		for (const fileUUID of fileUUIDs) {
+			let nodelink = await this.get(fileUUID)
+
+			// Nothing to remove from.
+			if (nodelink === undefined)
+				continue
+
+			const idx = nodelink.Nodes.indexOf(nodeUUID)
+			if (idx > -1)
+				nodelink.Nodes.splice(idx, 1)
+
+			// Maintains an index to quickly find orphaned files.
+			nodelink.NodeCount = nodelink.Nodes.length
+
+			console.log('removing', nodelink)
+			await this.add({data: nodelink})
+		}
+	}// }}}
+	async addFileUUIDs(nodeUUID, fileUUIDs) {// {{{
+		for (const fileUUID of fileUUIDs) {
+			let nodelink = await this.get(fileUUID)
+
+			// Needs to be initialized if not existing already.
+			if (nodelink === undefined)
+				nodelink = {
+					UUID: fileUUID,
+					Nodes: [nodeUUID],
+				}
+
+			// Can get called with the same UUID as already there.
+			// No duplicates, only append if missing.
+			if (!nodelink.Nodes.includes(nodeUUID))
+				nodelink.Nodes.push(nodeUUID)
+
+			// Maintains an index to quickly find orphaned files.
+			nodelink.NodeCount = nodelink.Nodes.length
+
+			console.log('pushing', nodelink)
+			await this.add({data: nodelink})
+		}
+	}// }}}
+}
+
 export function uuidv7() {// {{{
 	// random bytes
 	const value = new Uint8Array(16)

static/js/page_node.mjs

@@ -453,6 +453,8 @@ export class Node {
 	}//}}}
 
 	reset() {// {{{
+		// this._content is the runtime content in the editor.
+		// this.data.Content is the original data.
 		this._content = this.data.Content
 		this._modified = false
 	}// }}}
@@ -522,10 +524,7 @@ export class Node {
 		return this.data.Special
 	}// }}}
 	content() {//{{{
-		/* TODO - implement crypto
-		if (this.CryptoKeyID != 0 && !this._decrypted)
-			this.#decrypt()
-		*/
+		// TODO - implement crypto
 		return this._content
 	}//}}}
 	setContent(new_content) {//{{{
@@ -542,17 +541,32 @@ export class Node {
 		_mbus.dispatch('NODE_MODIFIED', { node: this })
 	}// }}}
 	async save() {//{{{
+		try {
+			const dblink = /db:\/\/([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})/gi
+
 			// Just safeguarding not using the root node,
 			// which sort of exist but isn't supposed to communicate to server.
 			if (this.UUID == ROOT_NODE)
 				return
 
+
+			// File links from the original, unmodified content are found to compare to links from the new content.
+			// All files (images) needs to be indexed to nodes in order to track orphaned files.
+			const before = new Set([...this.data.Content.matchAll(dblink)].map(m => m[1]))
+			const after = new Set([...this._content.matchAll(dblink)].map(m => m[1]))
+			const removed = before.difference(after)
+			const added = after.difference(before)
+
+			await nodeStore.filesNodelink.removeFileUUIDs(this.UUID, removed)
+			await nodeStore.filesNodelink.addFileUUIDs(this.UUID, added)
+
+			// Authoritative content and metadata is set to prepare it for IndexedDB update.
 			this.data.Content = this._content
 			this.data.Updated = new Date().toISOString()
 			this.data.HistoryUUID = uuidv7() // every time the node is saved a new history UUID identifies the changed node.
-		this._modified = false
 
 			_mbus.dispatch('NODE_UNMODIFIED')
+			this._modified = false
 
 			// When stored into database and ancestry was changed,
 			// the ancestry path could be interesting.
@@ -560,6 +574,7 @@ export class Node {
 			const ancestors = await nodeStore.getNodeAncestry(this)
 			this.data.Ancestors = ancestors.map(a => a.get('Name')).reverse()
 			*/
+
 			/* The node history is a local store for node history.
 			 * This could be provisioned from the server or cleared if
 			 * deemed unnecessary.
@@ -581,9 +596,12 @@ export class Node {
 			// Updated node is saved to the primary node store.
 			const nodeStoreAdding = nodeStore.add([this])
 
-		console.log('waiting')
 			await Promise.all([history, sendQueue, nodeStoreAdding])
-		console.log('waiting done')
+
+		} catch (err) {
+			console.error(err)
+			alert(err.message)
+		}
 
 		return
 	}//}}}

static/js/sync.mjs

@@ -164,7 +164,7 @@ export class Sync {
 			}
 		}
 	}//}}}
-	async filesToServer() {
+	async filesToServer() {// {{{
 		try {
 			const BLOCKSIZE = 128 * 1024
 			let sentBytes = 0
@@ -193,7 +193,7 @@ export class Sync {
 			console.error(e)
 			alert(e.message)
 		}
-	}
+	}// }}}
 }
 
 export class N2SyncProgress extends CustomHTMLElement {