1 files changed, 29 insertions, 0 deletions
diff --git a/utils/ident.js b/utils/ident.js
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index 0000000..6d18b88
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+++ b/utils/ident.js
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+// A portable script to find the sender when the server websocket opens (by cursor movement)
+
+module.exports = function identify(sock, initOnce, init){
+  // `sock` should be Socket instance.
+  // initOnce and init should be functions that act like they describe; initOnce runs once per program execution and init whenever the socket turns back on
+
+  sock.on('open', ()=>{
+    // "Pings" the server with a cursor location which is detected and saved by identity()
+    let coords = [Math.floor(Math.random()*100000+16), Math.floor(Math.random()*1000000+16)];
+    sock.cursor(coords);
+    sock.on('cursor', detect);
+    function detect(pos, send){
+      if (vec.equals(pos[0],coords)){
+        sock.off('cursor', detect);
+        identity(send);
+      }
+    }
+  }
+
+  // Calls initOnce and init on successful identification.
+  let initialized = false;
+  function identity(send){
+    if (! initialized){
+      initialized = true;
+      initOnce();
+    }
+    init(send);
+  }
+}