codelabs.y-socket.io/dist/chunk-MBNSJQBI.mjs

Socket IO Connector for Yjs (Inspired by y-websocket)

// src/server/document.ts
import * as d from "yjs";
import * as l from "y-protocols/awareness";
var w = process.env.GC !== "false" && process.env.GC !== "0", c = class extends d.Doc {
  constructor(t, e, s) {
    super({ gc: w });
    this.onUpdateDoc = (t) => {
      var e;
      if (((e = this.callbacks) == null ? void 0 : e.onUpdate) != null)
        try {
          this.callbacks.onUpdate(this, t);
        } catch (s) {
          console.warn(s);
        }
      this.namespace.emit("sync-update", t);
    };
    this.onUpdateAwareness = ({ added: t, updated: e, removed: s }, n) => {
      var o;
      let r = t.concat(e, s), a = l.encodeAwarenessUpdate(this.awareness, r);
      if (((o = this.callbacks) == null ? void 0 : o.onChangeAwareness) != null)
        try {
          this.callbacks.onChangeAwareness(this, a);
        } catch (y) {
          console.warn(y);
        }
      this.namespace.emit("awareness-update", a);
    };
    this.name = t, this.namespace = e, this.awareness = new l.Awareness(this), this.awareness.setLocalState(null), this.callbacks = s, this.awareness.on("update", this.onUpdateAwareness), this.on("update", this.onUpdateDoc);
  }
  async destroy() {
    var t;
    if (((t = this.callbacks) == null ? void 0 : t.onDestroy) != null)
      try {
        await this.callbacks.onDestroy(this);
      } catch (e) {
        console.warn(e);
      }
    this.awareness.off("update", this.onUpdateAwareness), this.off("update", this.onUpdateDoc), this.namespace.disconnectSockets(), super.destroy();
  }
};

// src/server/y-socket-io.ts
import * as i from "yjs";
import * as p from "y-protocols/awareness";
import { LeveldbPersistence as v } from "y-leveldb";
import { Observable as A } from "lib0/observable";
var u = class extends A {
  constructor(t, e) {
    var s;
    super();
    this._documents = /* @__PURE__ */ new Map();
    this._levelPersistenceDir = null;
    this.persistence = null;
    this.initSyncListeners = (t, e) => {
      t.on("sync-step-1", (s, n) => {
        n(i.encodeStateAsUpdate(e, new Uint8Array(s)));
      }), t.on("sync-update", (s) => {
        i.applyUpdate(e, s, null);
      });
    };
    this.initAwarenessListeners = (t, e) => {
      t.on("awareness-update", (s) => {
        p.applyAwarenessUpdate(e.awareness, new Uint8Array(s), t);
      });
    };
    this.initSocketListeners = (t, e) => {
      t.on("disconnect", async () => {
        (await t.nsp.allSockets()).size === 0 && (this.emit("all-document-connections-closed", [e]), this.persistence != null && (await this.persistence.writeState(e.name, e), await e.destroy()));
      });
    };
    this.startSynchronization = (t, e) => {
      t.emit("sync-step-1", i.encodeStateVector(e), (s) => {
        i.applyUpdate(e, new Uint8Array(s), this);
      }), t.emit("awareness-update", p.encodeAwarenessUpdate(e.awareness, Array.from(e.awareness.getStates().keys())));
    };
    this.io = t, this._levelPersistenceDir = (s = e == null ? void 0 : e.levelPersistenceDir) != null ? s : process.env.YPERSISTENCE, this._levelPersistenceDir != null && this.initLevelDB(this._levelPersistenceDir), this.configuration = e;
  }
  initialize() {
    let t = this.io.of(/^\/yjs\|.*$/);
    t.use(async (e, s) => {
      var n;
      return ((n = this.configuration) == null ? void 0 : n.authenticate) == null || await this.configuration.authenticate(e.handshake) ? s() : s(new Error("Unauthorized"));
    }), t.on("connection", async (e) => {
      var r;
      let s = e.nsp.name.replace(/\/yjs\|/, ""), n = await this.initDocument(s, e.nsp, (r = this.configuration) == null ? void 0 : r.gcEnabled);
      this.initSyncListeners(e, n), this.initAwarenessListeners(e, n), this.initSocketListeners(e, n), this.startSynchronization(e, n);
    });
  }
  get documents() {
    return this._documents;
  }
  async initDocument(t, e, s = !0) {
    var r;
    let n = (r = this._documents.get(t)) != null ? r : new c(t, e, {
      onUpdate: (a, o) => this.emit("document-update", [a, o]),
      onChangeAwareness: (a, o) => this.emit("awareness-update", [a, o]),
      onDestroy: async (a) => {
        this._documents.delete(a.name), this.emit("document-destroy", [a]);
      }
    });
    return n.gc = s, this._documents.has(t) || (this.persistence != null && await this.persistence.bindState(t, n), this._documents.set(t, n), this.emit("document-loaded", [n])), n;
  }
  initLevelDB(t) {
    let e = new v(t);
    this.persistence = {
      provider: e,
      bindState: async (s, n) => {
        let r = await e.getYDoc(s), a = i.encodeStateAsUpdate(n);
        await e.storeUpdate(s, a), i.applyUpdate(n, i.encodeStateAsUpdate(r)), n.on("update", async (o) => await e.storeUpdate(s, o));
      },
      writeState: async (s, n) => {
      }
    };
  }
};

export {
  c as a,
  u as b
};
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