[Init] Initial commit - NetMesh terminal manager

electron/plugins/runtime/viewPreload.cjs

@@ -0,0 +1,65 @@
+"use strict";
+
+const { contextBridge, ipcRenderer } = require("electron");
+
+function subscribe(channel, listener) {
+  if (typeof listener !== "function") throw new TypeError("Plugin view listener must be a function");
+  const handler = (_event, value) => listener(value);
+  ipcRenderer.on(channel, handler);
+  return Object.freeze({ dispose: () => ipcRenderer.removeListener(channel, handler) });
+}
+
+const ENVIRONMENT_CHANNEL = "netcatty-plugin-view:environment";
+const environmentListeners = new Set();
+let latestEnvironment;
+let environmentGeneration = 0;
+let initialEnvironmentRequest;
+
+function publishEnvironment(value) {
+  latestEnvironment = value;
+  environmentGeneration += 1;
+  for (const listener of environmentListeners) listener(value);
+}
+
+ipcRenderer.on(ENVIRONMENT_CHANNEL, (_event, value) => publishEnvironment(value));
+
+function subscribeEnvironment(listener) {
+  if (typeof listener !== "function") throw new TypeError("Plugin view listener must be a function");
+  environmentListeners.add(listener);
+  if (latestEnvironment !== undefined) {
+    const value = latestEnvironment;
+    const generation = environmentGeneration;
+    queueMicrotask(() => {
+      if (environmentListeners.has(listener) && generation === environmentGeneration) listener(value);
+    });
+  } else if (!initialEnvironmentRequest) {
+    initialEnvironmentRequest = ipcRenderer.invoke("netcatty-plugin-view:get-environment")
+      .then((value) => {
+        if (latestEnvironment === undefined) publishEnvironment(value);
+      })
+      .catch(() => {})
+      .finally(() => { initialEnvironmentRequest = undefined; });
+  }
+  return Object.freeze({ dispose: () => environmentListeners.delete(listener) });
+}
+
+contextBridge.exposeInMainWorld("netcattyView", Object.freeze({
+  postMessage(message) {
+    return ipcRenderer.invoke("netcatty-plugin-view:post-message", message);
+  },
+  executeCommand(command, args) {
+    return ipcRenderer.invoke("netcatty-plugin-view:execute-command", { command, args });
+  },
+  getState() {
+    return ipcRenderer.invoke("netcatty-plugin-view:get-state");
+  },
+  setState(state) {
+    return ipcRenderer.invoke("netcatty-plugin-view:set-state", state);
+  },
+  onDidReceiveMessage(listener) {
+    return subscribe("netcatty-plugin-view:message", listener);
+  },
+  onDidChangeEnvironment(listener) {
+    return subscribeEnvironment(listener);
+  },
+}));