Alpha POC

inject.js

@@ -1,26 +1,199 @@
-initSlackBridge();
-
-function initSlackBridge() {
-  $("#message-input").off("keydown");
-  $("#message-input").on("keydown", function(event) {
-    if (event.which == 13) { 
-      onMessageSubmit(); 
-    } 
-  });
-  $("#message-form").attr('onsubmit', "onMessageSubmit(); return false;");
-}
-function onMessageSubmit() {
-  message = $("#message-input").val();
-  message = message.rot13();
-  $("#message-input").val(message)
-  TS.view.submit();
-  $("#message-input").val(undefined)
+var SlackBridge = {
+
+  _MAGIC: "mSB00",
+
+  init: function() {
+    $("#message-input").off("keydown");
+    $("#message-input").on("keydown", function(event) {
+      if (event.which == 13) { 
+        SlackBridge.onMessageSubmit(); 
+      } 
+    });
+    $("#message-form").attr('onsubmit', "onMessageSubmit(); return false;");  
+  },
+
+  onMessageSubmit: function() {
+    user_id = TS.model.user.id;
+    channel_id = TS.model.active_channel_id;
+    group_id = TS.model.active_group_id;
+    if (channel_id != undefined) {
+      members = TS.channels.getChannelById(channel_id).members
+    } else if (group_id != undefined) {
+      members = TS.groups.getGroupById(group_id).members
+    }
+    message = $("#message-input").val();
+    message = SlackBridge.encryptMessage(message, members);
+    $("#message-input").val(message)
+    TS.view.submit();
+    setTimeout(function() {
+      $("#message-input").val("");
+      $("#message-input").val(undefined);
+      SlackBridge.unscramble();
+    }, 200);
+  },
+
+  encryptMessage: function(message, members) {
+    payload = {};
+    payload.keys = {};
+    $.each(members, function(index, member) {
+      payload.keys[member] = index;
+    });
+    payload.messages = {};
+    $.each(members, function(index, member) {
+      payload.messages[member] = message.rot13();
+    });
+    return SlackBridge._MAGIC + Base64.encode(JSON.stringify(payload));
+  },
+
+  decryptMessage: function(message) {
+    payload = JSON.parse(Base64.decode(message));
+    user_id = TS.model.user.id;
+    index = payload.keys[user_id];
+    if (index == undefined) {
+      return null;
+    }
+    return payload.messages[user_id].rot13();
+  },
+
+  unscramble: function() {
+    $.each($(".message_body"), function(index,e) { 
+      text = $(e).text();
+      if (text.indexOf(SlackBridge._MAGIC) == 0) {
+        message = text.substring(SlackBridge._MAGIC.length);
+        $(e).text(SlackBridge.decryptMessage(message));
+      }
+    });
+  }
 }
-function unscramble() {
-  $.each($(".message_body"), function(index,e) { 
-    text = $(e).text();
-    $(e).text(text.rot13());
-  });
+
+var Base64 = {
+
+    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
+
+    encode: function(input) {
+        var output = "";
+        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+        var i = 0;
+
+        input = Base64._utf8_encode(input);
+
+        while (i < input.length) {
+
+            chr1 = input.charCodeAt(i++);
+            chr2 = input.charCodeAt(i++);
+            chr3 = input.charCodeAt(i++);
+
+            enc1 = chr1 >> 2;
+            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+            enc4 = chr3 & 63;
+
+            if (isNaN(chr2)) {
+                enc3 = enc4 = 64;
+            } else if (isNaN(chr3)) {
+                enc4 = 64;
+            }
+
+            output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
+
+        }
+
+        return output;
+    },
+
+
+    decode: function(input) {
+        var output = "";
+        var chr1, chr2, chr3;
+        var enc1, enc2, enc3, enc4;
+        var i = 0;
+
+        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
+
+        while (i < input.length) {
+
+            enc1 = this._keyStr.indexOf(input.charAt(i++));
+            enc2 = this._keyStr.indexOf(input.charAt(i++));
+            enc3 = this._keyStr.indexOf(input.charAt(i++));
+            enc4 = this._keyStr.indexOf(input.charAt(i++));
+
+            chr1 = (enc1 << 2) | (enc2 >> 4);
+            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+            chr3 = ((enc3 & 3) << 6) | enc4;
+
+            output = output + String.fromCharCode(chr1);
+
+            if (enc3 != 64) {
+                output = output + String.fromCharCode(chr2);
+            }
+            if (enc4 != 64) {
+                output = output + String.fromCharCode(chr3);
+            }
+
+        }
+
+        output = Base64._utf8_decode(output);
+
+        return output;
+
+    },
+
+    _utf8_encode: function(string) {
+        string = string.replace(/\r\n/g, "\n");
+        var utftext = "";
+
+        for (var n = 0; n < string.length; n++) {
+
+            var c = string.charCodeAt(n);
+
+            if (c < 128) {
+                utftext += String.fromCharCode(c);
+            }
+            else if ((c > 127) && (c < 2048)) {
+                utftext += String.fromCharCode((c >> 6) | 192);
+                utftext += String.fromCharCode((c & 63) | 128);
+            }
+            else {
+                utftext += String.fromCharCode((c >> 12) | 224);
+                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+                utftext += String.fromCharCode((c & 63) | 128);
+            }
+
+        }
+
+        return utftext;
+    },
+
+    _utf8_decode: function(utftext) {
+        var string = "";
+        var i = 0;
+        var c = c1 = c2 = 0;
+
+        while (i < utftext.length) {
+
+            c = utftext.charCodeAt(i);
+
+            if (c < 128) {
+                string += String.fromCharCode(c);
+                i++;
+            }
+            else if ((c > 191) && (c < 224)) {
+                c2 = utftext.charCodeAt(i + 1);
+                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
+                i += 2;
+            }
+            else {
+                c2 = utftext.charCodeAt(i + 1);
+                c3 = utftext.charCodeAt(i + 2);
+                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
+                i += 3;
+            }
+
+        }
+
+        return string;
+    }
+
 }
 
 String.prototype.rot13 = function(){
@@ -29,3 +202,7 @@ String.prototype.rot13 = function(){
   });
 };
 
+SlackBridge.init();
+SlackBridge.unscramble();
+
+