From a628d12361f2fce054943a3ee433f4326edb6f26 Mon Sep 17 00:00:00 2001
From: reality <tinmachin3@gmail.com>
Date: Sun, 14 Apr 2013 17:21:24 +0000
Subject: [PATCH] Initial API module [#361]

---
 modules/api/api.js     | 50 ++++++++++++++++++++++++++++++++++++++++++
 modules/imgur/imgur.js |  2 ++
 modules/web/web.js     | 14 ++++++------
 3 files changed, 59 insertions(+), 7 deletions(-)
 create mode 100644 modules/api/api.js

diff --git a/modules/api/api.js b/modules/api/api.js
new file mode 100644
index 0000000..1dcb58d
--- /dev/null
+++ b/modules/api/api.js
@@ -0,0 +1,50 @@
+/**
+ * Name: API
+ * Description: Expose DBot API functionality with a REST API
+ */
+var _ = require('underscore')._;
+
+var api = function(dbot) {
+    this.onLoad = function() {
+        dbot.modules.web.app.get('/api/:module/:method', function(req, res) {
+            var module = req.params.module,
+                method = req.params.method,
+                body = { 'err': null, 'data': null };
+
+                if(!_.has(dbot.api, module)) {
+                    body.err = 'No such API module';
+                } else if(!_.has(dbot.api[module], method)) {
+                    body.err = 'No such API function in ' + module;
+                } else if(dbot.api[module][method].external !== true) {
+                    body.err = 'API function ' + module + '.' + method + 
+                        ' not enabled for external access';
+                }
+                
+                if(!body.err) {
+                    var func = dbot.api[module][method];
+                    var paramNames = func.extMap;
+                    var args = [];
+                    
+                    // TODO: Use request params to map to extMap args
+
+                    var callbackIndex = paramNames.indexOf('callback');
+                    if(callbackIndex != -1) {
+                        args[callbackIndex] = function() {
+                            body.data = Array.prototype.slice.call(arguments, 0);
+                            res.json(body);
+                        };
+                        func.apply(null, args);
+                    } else {
+                        body.data = func.call(null, args);
+                        res.json(body);
+                    }
+                } else {
+                    res.json(body);
+                }
+        }.bind(this));
+    }.bind(this);
+};
+
+exports.fetch = function(dbot) {
+    return new api(dbot);
+};
diff --git a/modules/imgur/imgur.js b/modules/imgur/imgur.js
index 27209c1..90f091b 100644
--- a/modules/imgur/imgur.js
+++ b/modules/imgur/imgur.js
@@ -67,6 +67,8 @@ var imgur = function(dbot) {
             });
         }
     };
+    this.api['getRandomImage'].external = true;
+    this.api['getRandomImage'].extMap = [ 'callback' ];
 
     this.commands = {
         '~ri': function(event) {
diff --git a/modules/web/web.js b/modules/web/web.js
index d860f32..4d0c702 100644
--- a/modules/web/web.js
+++ b/modules/web/web.js
@@ -3,17 +3,17 @@ var express = require('express'),
     fs = require('fs');
 
 var webInterface = function(dbot) {
-    var pub = 'public';
-    var app = express();
+    this.pub = 'public';
+    this.app = express();
 
-    app.use(express.static(pub));
-    app.set('view engine', 'jade');
+    this.app.use(express.static(this.pub));
+    this.app.set('view engine', 'jade');
 
-    app.get('/', function(req, res) {
+    this.app.get('/', function(req, res) {
         res.render('index', { 'name': dbot.config.name });
     });
    
-    var server = app.listen(dbot.config.web.webPort);
+    var server = this.app.listen(dbot.config.web.webPort);
 
     this.reloadPages = function() {
         var pages = dbot.pages;
@@ -21,7 +21,7 @@ var webInterface = function(dbot) {
             if(_.has(pages, p)) {
                 var func = pages[p];
                 var mod = func.module;
-                app.get(p, (function(req, resp) {
+                this.app.get(p, (function(req, resp) {
                     // Crazy shim to seperate module views.
                     var shim = Object.create(resp);
                     shim.render = (function(view, one, two) {