Adding some debug messages

src/database/database.ts

@@ -2,13 +2,21 @@ import { Rules } from "./rules";
 import Settings from "../settings";
 import getLevelDB, { LevelDB, deleteLevelDB, resNull } from "../storage";
 import DocumentLock from "./lock";
-import { DocumentQuery, CollectionQuery, Query, QueryError, ITypedQuery, IQuery } from "./query";
+import {
+   DocumentQuery,
+   CollectionQuery,
+   Query,
+   QueryError,
+   ITypedQuery,
+   IQuery,
+} from "./query";
 import Logging from "@hibas123/nodelogging";
 import Session from "./session";
 import nanoid = require("nanoid/generate");
 import { Observable } from "@hibas123/utils";
 
-const ALPHABET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+const ALPHABET =
+   "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
 
 // interface ITransaction {
 //    queries: ITypedQuery<IWriteQueries>[];
@@ -20,15 +28,20 @@ export class DatabaseManager {
    static async init() {
       let databases = await Settings.getDatabases();
 
-      databases.forEach(dbconfig => {
+      databases.forEach((dbconfig) => {
-         let db = new Database(dbconfig.name, dbconfig.accesskey, dbconfig.rules, dbconfig.publickey, dbconfig.rootkey);
+         let db = new Database(
+            dbconfig.name,
+            dbconfig.accesskey,
+            dbconfig.rules,
+            dbconfig.publickey,
+            dbconfig.rootkey
+         );
          this.databases.set(dbconfig.name, db);
-      })
+      });
    }
 
    static async addDatabase(name: string) {
-      if (this.databases.has(name))
+      if (this.databases.has(name)) throw new Error("Database already exists!");
-         throw new Error("Database already exists!");
 
       await Settings.addDatabase(name);
       let database = new Database(name);
@@ -41,11 +54,11 @@ export class DatabaseManager {
    }
 
    static async deleteDatabase(name: string) {
-      let db = this.databases.get(name)
+      let db = this.databases.get(name);
       if (db) {
          await Settings.deleteDatabase(name);
          await db.stop();
-         await deleteLevelDB(db.name)
+         await deleteLevelDB(db.name);
       }
    }
 }
@@ -58,8 +71,7 @@ export type Change = {
    collection: string;
    type: ChangeTypes;
    sender: string;
-}
+};
-
 
 export class Database {
    public static getKey(collectionid: string, documentid?: string) {
@@ -76,16 +88,15 @@ export class Database {
       return this.level.collection;
    }
 
-
    public rules: Rules;
-   private locks = new DocumentLock()
+   private locks = new DocumentLock();
-   public collectionLocks = new DocumentLock()
+   public collectionLocks = new DocumentLock();
 
    public changeListener = new Map<string, Set<(change: Change[]) => void>>();
    public collectionChangeListener = new Observable<{
       key: string;
       id: string;
-      type: "create" | "delete"
+      type: "create" | "delete";
    }>();
 
    toJSON() {
@@ -93,13 +104,18 @@ export class Database {
          name: this.name,
          accesskey: this.accesskey,
          publickey: this.publickey,
-         rules: this.rules
+         rules: this.rules,
-      }
+      };
    }
 
-   constructor(public name: string, public accesskey?: string, rawRules?: string, public publickey?: string, public rootkey?: string) {
+   constructor(
-      if (rawRules)
+      public name: string,
-         this.rules = new Rules(rawRules);
+      public accesskey?: string,
+      rawRules?: string,
+      public publickey?: string,
+      public rootkey?: string
+   ) {
+      if (rawRules) this.rules = new Rules(rawRules);
    }
 
    async setRules(rawRules: string) {
@@ -123,7 +139,10 @@ export class Database {
       this.publickey = key;
    }
 
-   public async resolve(path: string[], create = false): Promise<{ collection: string, document: string, collectionKey: string }> {
+   public async resolve(
+      path: string[],
+      create = false
+   ): Promise<{ collection: string; document: string; collectionKey: string }> {
       path = [...path]; // Create modifiable copy
       let collectionID: string = undefined;
       let documentKey = path.length % 2 === 0 ? path.pop() : undefined;
@@ -132,7 +151,10 @@ export class Database {
       const lock = await this.collectionLocks.lock(key);
 
       try {
-         collectionID = await this.collections.get(key).then(r => r.toString()).catch(resNull);
+         collectionID = await this.collections
+            .get(key)
+            .then((r) => r.toString())
+            .catch(resNull);
          if (!collectionID && create) {
             collectionID = nanoid(ALPHABET, 32);
             await this.collections.put(key, collectionID);
@@ -140,9 +162,9 @@ export class Database {
                this.collectionChangeListener.send({
                   id: collectionID,
                   key,
-                  type: "create"
+                  type: "create",
-               })
+               });
-            })
+            });
          }
       } finally {
          lock();
@@ -151,16 +173,16 @@ export class Database {
       return {
          collection: collectionID,
          document: documentKey,
-         collectionKey: key
+         collectionKey: key,
       };
    }
 
    private sendChanges(changes: Change[]) {
       let col = new Map<string, Map<string, Change[]>>();
-      changes.forEach(change => {
+      changes.forEach((change) => {
          let e = col.get(change.collection);
          if (!e) {
-            e = new Map()
+            e = new Map();
             col.set(change.collection, e);
          }
 
@@ -171,66 +193,67 @@ export class Database {
          }
 
          d.push(change);
-      })
+      });
 
       setImmediate(() => {
          for (let [collection, documents] of col.entries()) {
             let collectionChanges = [];
             for (let [document, documentChanges] of documents.entries()) {
-               let s = this.changeListener.get(Database.getKey(collection, document));
+               let s = this.changeListener.get(
-               if (s)
+                  Database.getKey(collection, document)
-                  s.forEach(e => setImmediate(() => e(documentChanges)));
+               );
+               if (s) s.forEach((e) => setImmediate(() => e(documentChanges)));
 
                collectionChanges.push(...documentChanges);
             }
-            let s = this.changeListener.get(Database.getKey(collection))
+            let s = this.changeListener.get(Database.getKey(collection));
-            if (s)
+            if (s) s.forEach((e) => setImmediate(() => e(collectionChanges)));
-               s.forEach(e => setImmediate(() => e(collectionChanges)))
          }
-      })
+      });
    }
 
    private validate(query: ITypedQuery<any>) {
       const inv = new QueryError("Malformed query!");
-      if (!query || typeof query !== "object")
+      if (!query || typeof query !== "object") throw inv;
-         throw inv;
 
-      if (!query.type)
+      if (!query.type) throw inv;
-         throw inv;
 
-      if (!query.path)
+      if (!query.path) throw inv;
-         throw inv;
    }
 
    async run(queries: IQuery[], session: Session) {
-      let resolve: { path: string[], create: boolean, resolved?: [string, string, string] }[] = [];
+      let resolve: {
+         path: string[];
+         create: boolean;
+         resolved?: [string, string, string];
+      }[] = [];
 
       const addToResolve = (path: string[], create?: boolean) => {
-         let entry = resolve.find(e => { //TODO: Find may be slow...
+         let entry = resolve.find((e) => {
-            if (e.path.length !== path.length)
+            //TODO: Find may be slow...
-               return false;
+            if (e.path.length !== path.length) return false;
             for (let i = 0; i < e.path.length; i++) {
-               if (e.path[i] !== path[i])
+               if (e.path[i] !== path[i]) return false;
-                  return false;
             }
             return true;
-         })
+         });
 
          if (!entry) {
             entry = {
                path,
-               create
+               create,
-            }
+            };
             resolve.push(entry);
          }
 
          entry.create = entry.create || create;
 
          return entry;
-      }
+      };
 
       const isBatch = queries.length > 1;
-      let parsed = queries.map(rawQuery => {
+      let parsed = queries.map((rawQuery) => {
+         Logging.debug("Running query:", rawQuery.type);
          this.validate(rawQuery);
          const isCollection = rawQuery.path.length % 2 === 1;
 
@@ -242,12 +265,11 @@ export class Database {
             throw new Error("There are queries that are not batch compatible!");
 
          let path = addToResolve(rawQuery.path, query.createCollection);
-         if (query.additionalLock)
+         if (query.additionalLock) addToResolve(query.additionalLock);
-            addToResolve(query.additionalLock);
 
          return {
             path,
-            query
+            query,
          };
       });
 
@@ -255,12 +277,13 @@ export class Database {
 
       let locks: (() => void)[] = [];
       for (let e of resolve) {
-         let { collection, document, collectionKey } = await this.resolve(e.path, e.create);
+         let { collection, document, collectionKey } = await this.resolve(
+            e.path,
+            e.create
+         );
          e.resolved = [collection, document, collectionKey];
 
-         locks.push(
+         locks.push(await this.locks.lock(collection, document));
-            await this.locks.lock(collection, document)
-         );
       }
 
       let result = [];
@@ -269,46 +292,48 @@ export class Database {
          let changes: Change[] = [];
          for (let e of parsed) {
             result.push(
-               await e.query.run(e.path.resolved[0], e.path.resolved[1], batch, e.path.resolved[2])
+               await e.query.run(
+                  e.path.resolved[0],
+                  e.path.resolved[1],
+                  batch,
+                  e.path.resolved[2]
+               )
             );
             changes.push(...e.query.changes);
          }
-         if (batch.length > 0)
+         if (batch.length > 0) await batch.write();
-            await batch.write();
 
          this.sendChanges(changes);
       } finally {
-         locks.forEach(lock => lock());
+         locks.forEach((lock) => lock());
       }
 
-      if (isBatch)
+      if (isBatch) return result;
-         return result;
+      else return result[0];
-      else
-         return result[0]
    }
 
-   async snapshot(rawQuery: ITypedQuery<"snapshot">, session: Session, onchange: (change: any) => void) {
+   async snapshot(
+      rawQuery: ITypedQuery<"snapshot">,
+      session: Session,
+      onchange: (change: any) => void
+   ) {
       Logging.debug("Snaphot request:", rawQuery.path);
       this.validate(rawQuery);
 
-      if (rawQuery.type !== "snapshot")
+      if (rawQuery.type !== "snapshot") throw new Error("Invalid query type!");
-         throw new Error("Invalid query type!");
 
       const isCollection = rawQuery.path.length % 2 === 1;
       let query = isCollection
          ? new CollectionQuery(this, session, rawQuery, true)
          : new DocumentQuery(this, session, rawQuery, true);
 
-      const {
+      const { unsubscribe, value } = await query.snapshot(onchange);
-         unsubscribe,
-         value
-      } = await query.snapshot(onchange);
 
       const id = nanoid(ALPHABET, 16);
       session.subscriptions.set(id, unsubscribe);
       return {
          id,
-         snaphot: value
+         snaphot: value,
       };
    }
 
@@ -328,39 +353,39 @@ export class Database {
       const should = await new Promise<Set<string>>((yes, no) => {
          const stream = this.collections.iterator({
             keyAsBuffer: false,
-            valueAsBuffer: false
+            valueAsBuffer: false,
-         })
+         });
 
          const collections = new Set<string>();
          const onValue = (err: Error, key: string, value: string) => {
             if (err) {
                Logging.error(err);
-               stream.end((err) => Logging.error(err))
+               stream.end((err) => Logging.error(err));
                no(err);
             }
 
             if (!key && !value) {
                yes(collections);
             } else {
-               collections.add(value)
+               collections.add(value);
                stream.next(onValue);
             }
-         }
+         };
 
          stream.next(onValue);
-      })
+      });
 
       const existing = await new Promise<Set<string>>((yes, no) => {
          const stream = this.data.iterator({
             keyAsBuffer: false,
-            values: false
+            values: false,
-         })
+         });
 
          const collections = new Set<string>();
          const onValue = (err: Error, key: string, value: Buffer) => {
             if (err) {
                Logging.error(err);
-               stream.end((err) => Logging.error(err))
+               stream.end((err) => Logging.error(err));
                no(err);
             }
 
@@ -368,19 +393,18 @@ export class Database {
                yes(collections);
             } else {
                let coll = key.split("/")[0];
-               collections.add(coll)
+               collections.add(coll);
                stream.next(onValue);
             }
-         }
+         };
 
          stream.next(onValue);
-      })
+      });
 
       const toDelete = new Set<string>();
-      existing.forEach(collection => {
+      existing.forEach((collection) => {
-         if (!should.has(collection))
+         if (!should.has(collection)) toDelete.add(collection);
-            toDelete.add(collection);
+      });
-      })
 
       for (let collection of toDelete) {
          const batch = this.data.batch();
@@ -390,20 +414,20 @@ export class Database {
 
          let lt = Buffer.alloc(gt.length);
          lt.set(gt);
-         lt[gt.length - 1] = 0xFF;
+         lt[gt.length - 1] = 0xff;
 
          await new Promise<void>((yes, no) => {
             const stream = this.data.iterator({
                keyAsBuffer: false,
                values: false,
                gt,
-               lt
+               lt,
-            })
+            });
 
             const onValue = (err: Error, key: string, value: Buffer) => {
                if (err) {
                   Logging.error(err);
-                  stream.end((err) => Logging.error(err))
+                  stream.end((err) => Logging.error(err));
                   no(err);
                }
 
@@ -413,15 +437,14 @@ export class Database {
                   batch.del(key);
                   stream.next(onValue);
                }
-            }
+            };
 
             stream.next(onValue);
-         })
+         });
 
          await batch.write();
       }
 
       return Array.from(toDelete.values());
    }
-
 }

src/database/lock.ts

@@ -4,7 +4,7 @@ export default class DocumentLock {
    private locks = new Map<string, (() => void)[]>();
 
    getLocks() {
-      return Array.from(this.locks.keys())
+      return Array.from(this.locks.keys());
    }
 
    async lock(collection: string = "", document: string = "") {
@@ -12,17 +12,18 @@ export default class DocumentLock {
       let key = collection + "/" + document;
       let l = this.locks.get(key);
       if (l)
-         await new Promise(resolve => { l.push(resolve); this.locks.set(key, l) });
+         await new Promise((resolve) => {
+            l.push(resolve);
+            this.locks.set(key, l);
+         });
       else {
          l = [];
          this.locks.set(key, l);
       }
 
       return () => {
-         if (l.length > 0)
+         if (l.length > 0) setImmediate(() => l.shift()());
-            setImmediate(() => l.shift()());
+         else this.locks.delete(key);
-         else
+      };
-            this.locks.delete(key)
-      }
    }
-}
+}

src/websocket.ts

@@ -2,7 +2,12 @@ import Logging from "@hibas123/nodelogging";
 import { IncomingMessage, Server } from "http";
 import * as WebSocket from "ws";
 import { DatabaseManager } from "./database/database";
-import { CollectionQuery, DocumentQuery, IQuery, ITypedQuery } from "./database/query";
+import {
+   CollectionQuery,
+   DocumentQuery,
+   IQuery,
+   ITypedQuery,
+} from "./database/query";
 import Session from "./database/session";
 import { verifyJWT } from "./helper/jwt";
 import nanoid = require("nanoid");
@@ -17,7 +22,8 @@ export class WebsocketConnectionManager {
 
    private static async onConnection(socket: WebSocket, req: IncomingMessage) {
       Logging.log("New Connection:");
-      const sendError = (error: string) => socket.send(JSON.stringify({ ns: "error_msg", data: error }));
+      const sendError = (error: string) =>
+         socket.send(JSON.stringify({ ns: "error_msg", data: error }));
 
       const session = new Session(nanoid());
 
@@ -61,16 +67,19 @@ export class WebsocketConnectionManager {
       }
 
       const answer = (id: string, data: any, error: boolean = false) => {
-         if (error)
+         if (error) Logging.error(error as any);
-            Logging.error(error as any);
+         socket.send(
-         socket.send(JSON.stringify({ ns: "message", data: { id, error, data } }));
+            JSON.stringify({ ns: "message", data: { id, error, data } })
-      }
+         );
+      };
 
-      const handler = new Map<string, ((data: any) => void)>();
+      const handler = new Map<string, (data: any) => void>();
 
-      handler.set("v2", async ({ id, query }) => db.run(Array.isArray(query) ? query : [query], session)
+      handler.set("v2", async ({ id, query }) =>
-         .then(res => answer(id, res))
+         db
-         .catch(err => answer(id, undefined, err))
+            .run(Array.isArray(query) ? query : [query], session)
+            .then((res) => answer(id, res))
+            .catch((err) => answer(id, undefined, err))
       );
 
       // handler.set("bulk", async ({ id, query }) => db.run(query, session)
@@ -78,18 +87,32 @@ export class WebsocketConnectionManager {
       //    .catch(err => answer(id, undefined, err))
       // );
 
-
       const SnapshotMap = new Map<string, string>();
-      handler.set("snapshot", async ({ id, query }: { id: string, query: ITypedQuery<"snapshot"> }) => {
+      handler.set(
-         db.snapshot(query, session, (data => {
+         "snapshot",
-            socket.send(JSON.stringify({
+         async ({
-               ns: "snapshot", data: { id, data }
+            id,
-            }));
+            query,
-         })).then(s => {
+         }: {
-            answer(id, s.snaphot);
+            id: string;
-            SnapshotMap.set(id, s.id);
+            query: ITypedQuery<"snapshot">;
-         }).catch(err => answer(id, undefined, err));
+         }) => {
-      })
+            db.snapshot(query, session, (data) => {
+               Logging.debug("Sending snapshot");
+               socket.send(
+                  JSON.stringify({
+                     ns: "snapshot",
+                     data: { id, data },
+                  })
+               );
+            })
+               .then((s) => {
+                  answer(id, s.snaphot);
+                  SnapshotMap.set(id, s.id);
+               })
+               .catch((err) => answer(id, undefined, err));
+         }
+      );
 
       handler.set("unsubscribe", async ({ id }) => {
          let i = SnapshotMap.get(id);
@@ -97,11 +120,11 @@ export class WebsocketConnectionManager {
             db.unsubscribe(i, session);
             SnapshotMap.delete(i);
          }
-      })
+      });
 
       socket.on("message", async (rawData: string) => {
          try {
-            let message: { ns: string, data: any } = JSON.parse(rawData);
+            let message: { ns: string; data: any } = JSON.parse(rawData);
             let h = handler.get(message.ns);
             if (h) {
                h(message.data);
@@ -110,13 +133,13 @@ export class WebsocketConnectionManager {
             Logging.errorMessage("Unknown Error:");
             Logging.error(err);
          }
-      })
+      });
 
       socket.on("close", () => {
          Logging.log(`${session.id} has disconnected!`);
-         session.subscriptions.forEach(unsubscribe => unsubscribe());
+         session.subscriptions.forEach((unsubscribe) => unsubscribe());
          session.subscriptions.clear();
          socket.removeAllListeners();
-      })
+      });
    }
-}
+}