From d3d9e2e7715f7cbdf9182a7676d663e1947f01cd Mon Sep 17 00:00:00 2001
From: ansuz <ansuz@transitiontech.ca>
Date: Mon, 4 Dec 2017 11:10:25 +0100
Subject: [PATCH] WIP: refactoring rpc code

---
 www/assert/main.js | 49 +++++++++++++++++++++++-
 www/common/wire.js | 94 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+), 2 deletions(-)
 create mode 100644 www/common/wire.js

diff --git a/www/assert/main.js b/www/assert/main.js
index 968200dc9..56cc29116 100644
--- a/www/assert/main.js
+++ b/www/assert/main.js
@@ -6,8 +6,9 @@ define([
     '/common/test.js',
     '/common/common-hash.js',
     '/common/common-thumbnail.js',
+    '/common/wire.js',
     '/common/flat-dom.js',
-], function ($, Hyperjson, Sortify, Drive, Test, Hash, Thumb, Flat) {
+], function ($, Hyperjson, Sortify, Drive, Test, Hash, Thumb, Wire, Flat) {
     window.Hyperjson = Hyperjson;
     window.Sortify = Sortify;
 
@@ -30,7 +31,7 @@ define([
 
         ASSERTS.forEach(function (f, index) {
             f(function (err) {
-                console.log("test " + index);
+                //console.log("test " + index);
                 done(err, index);
             }, index);
         });
@@ -235,6 +236,50 @@ define([
         return cb(true);
     }, "version 2 hash failed to parse correctly");
 
+    assert(function (cb) {
+        Wire.create({
+            constructor: function (cb) {
+                var service = function (type, data, cb) {
+                    switch (type) {
+                        case "HEY_BUDDY":
+                            return cb(void 0, "SALUT!");
+                        default:
+                            cb("ERROR");
+                    }
+                };
+
+                var respond;
+                cb(void 0, {
+                    send: function (raw, cb) {
+                        try {
+                            var parsed = JSON.parse(raw);
+                            var txid = parsed.txid;
+                            var message = parsed.message;
+                            setTimeout(function () {
+                                service(message.command, message.content, function (e, result) {
+                                    respond(JSON.stringify({
+                                        txid: txid,
+                                        error: e,
+                                        content: result,
+                                    }));
+                                });
+                            });
+                        } catch (e) { console.error("PEWPEW"); }
+                    },
+                    receive: function (f) {
+                        respond = f;
+                    },
+                });
+            },
+        }, function (e, rpc) {
+            if (e) { return cb(false); }
+            rpc.send('HEY_BUDDY', null, function (e, out) {
+                if (e) { return void cb(false); }
+                if (out === 'SALUT!') { cb(true); }
+            });
+        });
+    }, "Test rpc factory");
+
 /*
     assert(function (cb) {
         var getBlob = function (url, cb) {
diff --git a/www/common/wire.js b/www/common/wire.js
new file mode 100644
index 000000000..e0a3530b2
--- /dev/null
+++ b/www/common/wire.js
@@ -0,0 +1,94 @@
+define([
+
+], function () {
+    var Wire = {};
+
+    /*  MISSION: write a generic RPC framework
+
+Requirements
+
+* some transmission methods can be interrupted
+  * handle disconnects and reconnects
+* handle callbacks
+* configurable timeout
+* Service should expose 'addClient' method
+  * and handle broadcast
+
+
+* 
+
+    */
+
+    var uid = function () {
+        return Number(Math.floor(Math.random () *
+            Number.MAX_SAFE_INTEGER)).toString(32);
+    };
+
+/*
+opt = {
+    send: function () {
+
+    },
+    receive: function () {
+
+    },
+    constructor: function (cb) {
+        cb(void 0 , {
+            send: function (content, cb) {
+
+            },
+            receive: function () {
+
+            }
+        });
+    },
+};
+*/
+
+    Wire.create = function (opt, cb) {
+        var ctx = {};
+        var pending = ctx.pending = {};
+        ctx.connected = false;
+
+        var rpc = {};
+
+        opt.constructor(function (e, service) {
+            if (e) { return setTimeout(function () { cb(e); }); }
+
+            rpc.send = function (type, data, cb) {
+                var txid = uid();
+                if (typeof(cb) !== 'function') {
+                    throw new Error('expected callback');
+                }
+
+                ctx.pending[txid] = function (err, response) {
+                    cb(err, response);
+                };
+
+                service.send(JSON.stringify({
+                    txid: txid,
+                    message: {
+                        command: type,
+                        content: data,
+                    },
+                }));
+            };
+
+            service.receive(function (raw) {
+                try {
+                    var data = JSON.parse(raw);
+                    var txid = data.txid;
+                    if (!txid) { throw new Error('NO_TXID'); }
+                    var cb = pending[txid];
+                    if (data.error) { return void cb(data.error); }
+                    cb(void 0, data.content);
+                } catch (e) { console.error("UNHANDLED_MESSAGE", data); }
+            });
+
+            cb(void 0, rpc);
+        });
+    };
+
+
+    return Wire;
+});