From c61db96980f83991aab7238a3d663b71cabc4b79 Mon Sep 17 00:00:00 2001
From: Amish Shah <amishshah.2k@gmail.com>
Date: Sat, 29 Apr 2017 20:00:05 +0100
Subject: [PATCH] sorry gus i borked

---
 src/client/rest/DiscordAPIError.js            | 39 ++++++++++++
 src/client/rest/RequestHandlers/Burst.js      |  3 +-
 src/client/rest/RequestHandlers/Sequential.js | 60 +++++++++----------
 src/util/Constants.js                         |  2 +-
 4 files changed, 71 insertions(+), 33 deletions(-)
 create mode 100644 src/client/rest/DiscordAPIError.js

diff --git a/src/client/rest/DiscordAPIError.js b/src/client/rest/DiscordAPIError.js
new file mode 100644
index 000000000000..a6583681a8a8
--- /dev/null
+++ b/src/client/rest/DiscordAPIError.js
@@ -0,0 +1,39 @@
+/**
+ * Represents an error from the Discord API
+ */
+class DiscordAPIError extends Error {
+  constructor(error) {
+    super();
+    const flattened = error.errors ? `\n${this.constructor.flattenErrors(error.errors).join('\n')}` : '';
+    this.name = 'DiscordAPIError';
+    this.message = `${error.message}${flattened}`;
+
+    /**
+     * HTTP error code returned by Discord
+     * @type {number}
+     */
+    this.code = error.code;
+  }
+
+  /**
+   * Flattens an errors object returned from the API into an array
+   * @param {Object} obj Discord errors object
+   * @param {string} [key] idklol
+   * @returns {string[]}
+   */
+  static flattenErrors(obj, key = '') {
+    let messages = [];
+    for (const k of Object.keys(obj)) {
+      const newKey = key ? isNaN(k) ? `${key}.${k}` : `${key}[${k}]` : k;
+      if (obj[k]._errors) {
+        messages.push(`${newKey}: ${obj[k]._errors.map(e => e.message).join(' ')}`);
+      } else {
+        messages = messages.concat(this.flattenErrors(obj[k], newKey));
+      }
+    }
+
+    return messages;
+  }
+}
+
+module.exports = DiscordAPIError;
diff --git a/src/client/rest/RequestHandlers/Burst.js b/src/client/rest/RequestHandlers/Burst.js
index dd33a4b52331..e5a160246897 100644
--- a/src/client/rest/RequestHandlers/Burst.js
+++ b/src/client/rest/RequestHandlers/Burst.js
@@ -1,4 +1,5 @@
 const RequestHandler = require('./RequestHandler');
+const DiscordAPIError = require('../DiscordAPIError');
 
 class BurstRequestHandler extends RequestHandler {
   constructor(restManager, endpoint) {
@@ -40,7 +41,7 @@ class BurstRequestHandler extends RequestHandler {
             this.resetTimeout = null;
           }, Number(res.headers['retry-after']) + this.client.options.restTimeOffset);
         } else {
-          item.reject(err);
+          item.reject(err.status === 400 ? new DiscordAPIError(res.body) : err);
           this.handle();
         }
       } else {
diff --git a/src/client/rest/RequestHandlers/Sequential.js b/src/client/rest/RequestHandlers/Sequential.js
index d5a3a8c14836..9ba3c9ebb440 100644
--- a/src/client/rest/RequestHandlers/Sequential.js
+++ b/src/client/rest/RequestHandlers/Sequential.js
@@ -1,4 +1,5 @@
 const RequestHandler = require('./RequestHandler');
+const DiscordAPIError = require('../DiscordAPIError');
 
 /**
  * Handles API Requests sequentially, i.e. we wait until the current request is finished before moving onto
@@ -48,42 +49,39 @@ class SequentialRequestHandler extends RequestHandler {
   execute(item) {
     this.busy = true;
     return new Promise(resolve => {
-      item.request
-        .gen()
-        .on('error', e => item.reject(e))
-        .end((err, res) => {
-          if (res && res.headers) {
-            this.requestLimit = Number(res.headers['x-ratelimit-limit']);
-            this.requestResetTime = Number(res.headers['x-ratelimit-reset']) * 1000;
-            this.requestRemaining = Number(res.headers['x-ratelimit-remaining']);
-            this.timeDifference = Date.now() - new Date(res.headers.date).getTime();
-          }
-          if (err) {
-            if (err.status === 429) {
-              this.queue.unshift(item);
-              this.restManager.client.setTimeout(() => {
-                this.globalLimit = false;
-                resolve();
-              }, Number(res.headers['retry-after']) + this.restManager.client.options.restTimeOffset);
-              if (res.headers['x-ratelimit-global']) this.globalLimit = true;
-            } else {
-              item.reject(err);
-              resolve(err);
-            }
+      item.request.gen().end((err, res) => {
+        if (res && res.headers) {
+          this.requestLimit = Number(res.headers['x-ratelimit-limit']);
+          this.requestResetTime = Number(res.headers['x-ratelimit-reset']) * 1000;
+          this.requestRemaining = Number(res.headers['x-ratelimit-remaining']);
+          this.timeDifference = Date.now() - new Date(res.headers.date).getTime();
+        }
+        if (err) {
+          if (err.status === 429) {
+            this.queue.unshift(item);
+            this.restManager.client.setTimeout(() => {
+              this.globalLimit = false;
+              resolve();
+            }, Number(res.headers['retry-after']) + this.restManager.client.options.restTimeOffset);
+            if (res.headers['x-ratelimit-global']) this.globalLimit = true;
           } else {
-            this.globalLimit = false;
-            const data = res && res.body ? res.body : {};
-            item.resolve(data);
-            if (this.requestRemaining === 0) {
-              this.restManager.client.setTimeout(
+            item.reject(err.status === 400 ? new DiscordAPIError(res.body) : err);
+            resolve(err);
+          }
+        } else {
+          this.globalLimit = false;
+          const data = res && res.body ? res.body : {};
+          item.resolve(data);
+          if (this.requestRemaining === 0) {
+            this.restManager.client.setTimeout(
               () => resolve(data),
               this.requestResetTime - Date.now() + this.timeDifference + this.restManager.client.options.restTimeOffset
             );
-            } else {
-              resolve(data);
-            }
+          } else {
+            resolve(data);
           }
-        });
+        }
+      });
     });
   }
 
diff --git a/src/util/Constants.js b/src/util/Constants.js
index dbd69337f112..fbd8538da3f4 100644
--- a/src/util/Constants.js
+++ b/src/util/Constants.js
@@ -64,7 +64,7 @@ exports.DefaultOptions = {
     version: 6,
   },
   http: {
-    version: 6,
+    version: 7,
     host: 'https://discordapp.com',
     cdn: 'https://cdn.discordapp.com',
   },