Move some fastly-specific stuff into a module

bin/lib/fastly-extended.js

@@ -0,0 +1,49 @@
+var Fastly = require('fastly');
+
+module.exports = function (apiKey, serviceId) {
+    var fastly = Fastly(apiKey);
+    fastly.serviceId = serviceId;
+
+    fastly.negateConditionStatement = function (statement) {
+        return '!(' + statement + ')';
+    };
+
+    fastly.getFastlyAPIPrefix = function (serviceId, version) {
+        return '/service/' + encodeURIComponent(serviceId) + '/version/' + version;
+    };
+
+    fastly.getLatestVersion = function (cb) {
+        if (!this.serviceId) return cb('No serviceId configured');
+        var url = '/service/'+ encodeURIComponent(this.serviceId) +'/version';
+        this.request('GET', url, function (err, versions) {
+            if (err) return cb(err);
+            var latestVersion = versions.reduce(function (latestVersion, version) {
+                if (!latestVersion) return version;
+                if (version.number > latestVersion.number) return version;
+                return latestVersion;
+            });
+            return cb(null, latestVersion);
+        });    
+    };
+
+    fastly.setCondition = function (version, name, condition, cb) {
+        if (!this.serviceId) return callback('No serviceId configured');
+        var putUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/condition/' + encodeURIComponent(name);
+        var postUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/condition';
+        return this.request('PUT', putUrl, condition, function (err, response) {
+            if (err && err.statusCode === 404) return this.request('POST', postUrl, condition, cb);
+            return cb(err, response);
+        }.bind(this));
+    };
+
+    fastly.setHeader = function (version, name, header, cb) {
+        var putUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/header/' + encodeURIComponent(name);
+        var postUrl = this.getFastlyAPIPrefix(this.serviceId, version) + '/header';
+        return this.request('PUT', putUrl, header, function (err, response) {
+            if (err && err.statusCode === 404) return this.request('POST', postUrl, header, cb);
+            return cb(err, response);
+        }.bind(this));
+    };
+
+    return fastly;
+};