Socket made into an ES6 class

1 files changed, 82 insertions, 78 deletions

diff --git a/socket.js b/socket.js
index 47e558d..3d8e63b 100644
--- a/socket.js
+++ b/socket.js
@@ -7,99 +7,103 @@ let mod = (div, end) => ( ( (div % end) + end ) % end ) // Makes it such that (-
 class retryws extends EventEmitter{ // a wrapper on ws that retries on failure
   constructor(addr) {
     super();
-    let sock;
-    let sockdown = true; 
-    this.send = (message) => {
-      if (sockdown){
-        throw "Socket is down!";
-      }
-      sock.send(message);
+    this._sock;
+    this._sockdown = true; 
+    this._addr = addr;
+    this.sockinit();
+  }
+  send(message){
+    if (this._sockdown){
+      throw "Socket is down!";
     }
+    this._sock.send(message);
+  }
+  sockinit(){ // addr is not expected to change, so not handed as input; similarly, sock is not passed in a chain because behavior is expected to be serial (either initializing or retrying)
     let self = this;
-    function sockinit(){ // addr is not expected to change, so not handed as input; similarly, sock is not passed in a chain because behavior is expected to be serial (either initializing or retrying)
-      sock = new ws(addr);
-      sock.on('open', () => { sockdown = false; self.emit('open'); });
-      sock.on('close', (err) => { console.log('close', err); setTimeout(sockinit,1000); sockdown = true; self.emit('close'); });
-      sock.on('error', (err) => { console.log('error', err); sock.close(); });
-      sock.on('message', (message) => { self.emit('message',message);});
-    }
-    sockinit();
+    this._sock = new ws(this._addr);
+    this._sock.on('open', () => { self._sockdown = false; self.emit('open'); });
+    this._sock.on('close', (err) => { console.log('close', err);
+    setTimeout(self.sockinit,1000); self._sockdown = true; self.emit('close'); });
+    this._sock.on('error', (err) => { console.log('error', err); self._sock.close(); });
+    this._sock.on('message', (message) => { self.emit('message',message);});
   }
+
 }
 
 class Socket extends retryws {
-  constructor(world='') { // Takes the name of the world, which can be an empty string.
+  constructor(world=''){ // Takes the name of the world, which can be an empty string.
     let loc = (world == '') ? '' : `${world}/`;
     let addr = `wss://www.yourworldoftext.com/${loc}ws/`;
     super(addr);
-    let writect = 0; // A running counter to make the server write confirmations meaningful
-    this.on('message', (msg)=>{
-      msg = JSON.parse(msg);
-      switch (msg.kind){
-        case 'write':
-          this.emit('write', msg.accepted, msg.rejected); break; // A confirmation message for writes (accepted/rejected updates)
-        case 'cursor':
-          this.emit('cursor', msg.positions.map(pos => [pos.tileY*8+pos.charY,pos.tileX*16+pos.charX]), msg.sender); break; // Must be used for self-identification
-        case 'tileUpdate':
-          this.emit('tileUpdate', msg.sender, msg.source, msg.tiles); break; // Any change by another user or possibly oneself
-        case 'fetch':
-          this.emit('fetch', msg.tiles); break; // The response to a fetch request
-      }
-    });
+    this._writect = 0; // A running counter to make the server write confirmations meaningful
+    this.on('message', this._msgparse);
+  }
+  _msgparse(msg){
+    msg = JSON.parse(msg);
+    switch (msg.kind){
+      case 'write':
+        this.emit('write', msg.accepted, msg.rejected); break; // A confirmation message for writes (accepted/rejected updates)
+      case 'cursor':
+        this.emit('cursor', msg.positions.map(pos => [pos.tileY*8+pos.charY,pos.tileX*16+pos.charX]), msg.sender); break; // Must be used for self-identification
+      case 'tileUpdate':
+        this.emit('tileUpdate', msg.sender, msg.source, msg.tiles); break; // Any change by another user or possibly oneself
+      case 'fetch':
+        this.emit('fetch', msg.tiles); break; // The response to a fetch request
+    }
+  }
 
-    this.fetch = function(coords){ //coords is a list of min/max pairs of y/x coordinate pairs which each describe at most 1000 tiles
-      for (let i=0; i<coords.length; i++){
-        let c = coords[i];
-        if ( (c[1][0]-c[0][0]+1) * (c[1][1]-c[0][1]+1) > 1000) throw "Fetch has overlarge rectangular request";
-        coords[i] = {"minY":c[0][0], "minX":c[0][1], "maxY":c[1][0], "maxX":c[1][1]};
-      }
-      this.send( JSON.stringify({
-        "fetchRectangles": coords,
-        "kind": "fetch",
-        "v": "3"
-      }));
+  fetch(coords){ //coords is a list of min/max pairs of y/x coordinate pairs which each describe at most 1000 tiles
+    for (let i=0; i<coords.length; i++){
+      let c = coords[i];
+      if ( (c[1][0]-c[0][0]+1) * (c[1][1]-c[0][1]+1) > 1000) throw "Fetch has overlarge rectangular request";
+      coords[i] = {"minY":c[0][0], "minX":c[0][1], "maxY":c[1][0], "maxX":c[1][1]};
     }
+    this.send( JSON.stringify({
+      "fetchRectangles": coords,
+      "kind": "fetch",
+      "v": "3"
+    }));
+  }
 
-    this.write = function(chars){ //chars is an list of pairs [ pixel coordinate (y/x < 16), char ]
-      if (chars.length > 200) throw "Too many characters to write by server decree";
-      if (chars.length == 0) throw "Send at least a character.";
-      let write = [];
-      for (let cha of chars){
-        let coord = cha[0];
-        write.push([
-          Math.floor(coord[0]/8),
-          Math.floor(coord[1]/16),
-          mod(coord[0], 8),
-          mod(coord[1], 16),
-          0,
-          cha[1],
-          writect
-        ]);
-        writect++;
-      }
-      this.send( JSON.stringify({
-        "edits": write,
-        "kind": "write"
-      }));
-      return writect-1; // Last label within write for cross-referencing with confirmation
+  write(chars){ //chars is an list of pairs [ pixel coordinate (y/x < 16), char ]
+    if (chars.length > 200) throw "Too many characters to write by server decree";
+    if (chars.length == 0) throw "Send at least a character.";
+    let write = [];
+    for (let cha of chars){
+      let coord = cha[0];
+      write.push([
+        Math.floor(coord[0]/8),
+        Math.floor(coord[1]/16),
+        mod(coord[0], 8),
+        mod(coord[1], 16),
+        0,
+        cha[1],
+        this._writect
+      ]);
+      this._writect++;
     }
+    this.send( JSON.stringify({
+      "edits": write,
+      "kind": "write"
+    }));
+    return this._writect-1; // Last label within write for cross-referencing with confirmation
+  }
     
-    this.cursor = function(coords){ //coords is just one pair of char coords; I think the api could handle more, but it's unnecessary for now.
-      this.send( JSON.stringify({
-        "kind": "cursor",
-        "positions":
-        [
-          {
-            "tileY": Math.floor(coords[0]/8),
-            "tileX": Math.floor(coords[1]/16),
-            "charY": coords[0] % 8,
-            "charX": coords[1] % 16
-          }
-        ]
-      }));
-    }
-
+  cursor(coords){ //coords is just one pair of char coords; I think the api could handle more, but it's unnecessary for now.
+    this.send( JSON.stringify({
+      "kind": "cursor",
+      "positions":
+      [
+        {
+          "tileY": Math.floor(coords[0]/8),
+          "tileX": Math.floor(coords[1]/16),
+          "charY": coords[0] % 8,
+          "charX": coords[1] % 16
+        }
+      ]
+    }));
   }
+
 }
 
 module.exports = Socket;