add back webxdc.js needed by the github page

frontend/webxdc.js

@@ -0,0 +1,296 @@
+// used for the github page
+
+localStorage.clear();
+
+//@ts-check
+/** @type {import('./webxdc').Webxdc<any>} */
+window.webxdc = (() => {
+  var updateListener = (_) => {};
+  var updatesKey = "__xdcUpdatesKey__";
+  window.addEventListener("storage", (event) => {
+    if (event.key == null) {
+      window.location.reload();
+    } else if (event.key === updatesKey) {
+      var updates = JSON.parse(event.newValue);
+      var update = updates[updates.length - 1];
+      update.max_serial = updates.length;
+      console.log("[Webxdc] " + JSON.stringify(update));
+      updateListener(update);
+    }
+  });
+
+  function getUpdates() {
+    var updatesJSON = window.localStorage.getItem(updatesKey);
+    return updatesJSON ? JSON.parse(updatesJSON) : [];
+  }
+
+  var params = new URLSearchParams(window.location.hash.substr(1));
+  return {
+    selfAddr: params.get("addr") || "device0@local.host",
+    selfName: params.get("name") || "device0",
+    setUpdateListener: (cb, serial = 0) => {
+      var updates = getUpdates();
+      var maxSerial = updates.length;
+      updates.forEach((update) => {
+        if (update.serial > serial) {
+          update.max_serial = maxSerial;
+          cb(update);
+        }
+      });
+      updateListener = cb;
+      return Promise.resolve();
+    },
+    getAllUpdates: () => {
+      console.log("[Webxdc] WARNING: getAllUpdates() is deprecated.");
+      return Promise.resolve([]);
+    },
+    sendUpdate: (update, description) => {
+      var updates = getUpdates();
+      var serial = updates.length + 1;
+      var _update = {
+        payload: update.payload,
+        summary: update.summary,
+        info: update.info,
+        serial: serial,
+      };
+      updates.push(_update);
+      window.localStorage.setItem(updatesKey, JSON.stringify(updates));
+      _update.max_serial = serial;
+      console.log(
+        '[Webxdc] description="' + description + '", ' + JSON.stringify(_update)
+      );
+      updateListener(_update);
+      if (_update.payload.method === "Sync") {
+          sendData();
+      }
+    },
+    sendToChat: async (content) => {
+      if (!content.file && !content.text) {
+        alert("🚨 Error: either file or text need to be set. (or both)");
+        return Promise.reject(
+          "Error from sendToChat: either file or text need to be set"
+        );
+      }
+
+      /** @type {(file: Blob) => Promise<string>} */
+      const blob_to_base64 = (file) => {
+        const data_start = ";base64,";
+        return new Promise((resolve, reject) => {
+          const reader = new FileReader();
+          reader.readAsDataURL(file);
+          reader.onload = () => {
+            /** @type {string} */
+            //@ts-ignore
+            let data = reader.result;
+            resolve(data.slice(data.indexOf(data_start) + data_start.length));
+          };
+          reader.onerror = () => reject(reader.error);
+        });
+      };
+
+      let base64Content;
+      if (content.file) {
+        if (!content.file.name) {
+          return Promise.reject("file name is missing");
+        }
+        if (
+          Object.keys(content.file).filter((key) =>
+            ["blob", "base64", "plainText"].includes(key)
+          ).length > 1
+        ) {
+          return Promise.reject(
+            "you can only set one of `blob`, `base64` or `plainText`, not multiple ones"
+          );
+        }
+
+        // @ts-ignore - needed because typescript imagines that blob would not exist
+        if (content.file.blob instanceof Blob) {
+          // @ts-ignore - needed because typescript imagines that blob would not exist
+          base64Content = await blob_to_base64(content.file.blob);
+          // @ts-ignore - needed because typescript imagines that base64 would not exist
+        } else if (typeof content.file.base64 === "string") {
+          // @ts-ignore - needed because typescript imagines that base64 would not exist
+          base64Content = content.file.base64;
+          // @ts-ignore - needed because typescript imagines that plainText would not exist
+        } else if (typeof content.file.plainText === "string") {
+          base64Content = await blob_to_base64(
+            // @ts-ignore - needed because typescript imagines that plainText would not exist
+            new Blob([content.file.plainText])
+          );
+        } else {
+          return Promise.reject(
+            "data is not set or wrong format, set one of `blob`, `base64` or `plainText`, see webxdc documentation for sendToChat"
+          );
+        }
+      }
+      const msg = `The app would now close and the user would select a chat to send this message:\nText: ${
+        content.text ? `"${content.text}"` : "No Text"
+      }\nFile: ${
+        content.file
+          ? `${content.file.name} - ${base64Content.length} bytes`
+          : "No File"
+      }`;
+      if (content.file) {
+        const confirmed = confirm(
+          msg + "\n\nDownload the file in the browser instead?"
+        );
+        if (confirmed) {
+          var element = document.createElement("a");
+          element.setAttribute(
+            "href",
+            "data:application/octet-stream;base64," + base64Content
+          );
+          element.setAttribute("download", content.file.name);
+          document.body.appendChild(element);
+          element.click();
+          document.body.removeChild(element);
+        }
+      } else {
+        alert(msg);
+      }
+    },
+    importFiles: (filters) => {
+      var element = document.createElement("input");
+      element.type = "file";
+      element.accept = [
+        ...(filters.extensions || []),
+        ...(filters.mimeTypes || []),
+      ].join(",");
+      element.multiple = filters.multiple || false;
+      const promise = new Promise((resolve, _reject) => {
+        element.onchange = (_ev) => {
+          console.log("element.files", element.files);
+          const files = Array.from(element.files || []);
+          document.body.removeChild(element);
+          resolve(files);
+        };
+      });
+      element.style.display = "none";
+      document.body.appendChild(element);
+      element.click();
+      console.log(element);
+      return promise;
+    },
+  };
+})();
+
+window.addXdcPeer = () => {
+  var loc = window.location;
+  // get next peer ID
+  var params = new URLSearchParams(loc.hash.substr(1));
+  var peerId = Number(params.get("next_peer")) || 1;
+
+  // open a new window
+  var peerName = "device" + peerId;
+  var url =
+    loc.protocol +
+    "//" +
+    loc.host +
+    loc.pathname +
+    "#name=" +
+    peerName +
+    "&addr=" +
+    peerName +
+    "@local.host";
+  window.open(url);
+
+  // update next peer ID
+  params.set("next_peer", String(peerId + 1));
+  window.location.hash = "#" + params.toString();
+};
+
+window.clearXdcStorage = () => {
+  window.localStorage.clear();
+  window.location.reload();
+};
+
+window.alterXdcApp = () => {
+  var styleControlPanel =
+    "position: fixed; bottom:1em; left:1em; background-color: #000; opacity:0.8; padding:.5em; font-size:16px; font-family: sans-serif; color:#fff; z-index: 9999";
+  var styleMenuLink =
+    "color:#fff; text-decoration: none; vertical-align: middle";
+  var styleAppIcon =
+    "height: 1.5em; width: 1.5em; margin-right: 0.5em; border-radius:10%; vertical-align: middle";
+  var title = document.getElementsByTagName("title")[0];
+  if (typeof title == "undefined") {
+    title = document.createElement("title");
+    document.getElementsByTagName("head")[0].append(title);
+  }
+  title.innerText = window.webxdc.selfAddr;
+
+  if (window.webxdc.selfName === "device0") {
+    var div = document.createElement("div");
+    div.innerHTML =
+      '<div id="webxdc-panel" style="' +
+      styleControlPanel +
+      '">' +
+      '<a href="javascript:window.addXdcPeer();" style="' +
+      styleMenuLink +
+      '">Add Peer</a>' +
+      '<span style="' +
+      styleMenuLink +
+      '"> | </span>' +
+      '<a id="webxdc-panel-clear" href="javascript:window.clearXdcStorage();" style="' +
+      styleMenuLink +
+      '">Clear Storage</a>' +
+      "<div>";
+    var controlPanel = div.firstChild;
+
+    function loadIcon(name) {
+      var tester = new Image();
+      tester.onload = () => {
+        div.innerHTML = '<img src="' + name + '" style="' + styleAppIcon + '">';
+        controlPanel.insertBefore(div.firstChild, controlPanel.firstChild);
+      };
+      tester.src = name;
+    }
+    loadIcon("icon.png");
+    loadIcon("icon.jpg");
+
+    document.getElementsByTagName("body")[0].append(controlPanel);
+  }
+};
+
+//window.addEventListener("load", window.alterXdcApp);
+
+// mock data
+function sendData() {
+    fetch("./data.json")
+        .then(response => {
+            if (!response.ok) {
+                throw new Error("HTTP error " + response.status);
+            }
+            return response.json();
+        })
+        .then(json => {
+            json.bots.map((bot) => {
+                bot.admin = { ...json.admins[bot.admin], name: bot.admin };
+                bot.lang = { code: bot.lang, label: json.langs[bot.lang] };
+            });
+            let now = new Date().toString();
+            window.webxdc.sendUpdate({
+                payload: {
+                    error: null,
+                    id: "sync",
+                    result: [
+                        now,
+                        {
+                            hash: now,
+                            bots: json.bots
+                        },
+                        null
+                    ]
+                }
+            });
+        }).catch(function (err) {
+            window.webxdc.sendUpdate({
+                payload: {
+                    error: {code: -100, message: "Failed to fetch data: " + err},
+                    id: "sync"
+                }
+            });
+        });
+}
+if (!localStorage.getItem("lastSyncReqKey")) {
+    sendData();
+}