1 files changed, 65 insertions, 0 deletions
diff --git a/node-mastodon/lib/helpers.js b/node-mastodon/lib/helpers.js
new file mode 100644
index 0000000..8833968
--- /dev/null
+++ b/node-mastodon/lib/helpers.js
@@ -0,0 +1,65 @@
+var querystring = require('querystring');
+var request = require('request');
+
+/**
+ * For each `/:param` fragment in path, move the value in params
+ * at that key to path. If the key is not found in params, throw.
+ * Modifies both params and path values.
+ *
+ * @param  {Objet} params  Object used to build path.
+ * @param  {String} path   String to transform.
+ * @return {Undefined}
+ *
+ */
+exports.moveParamsIntoPath = function (params, path) {
+  var rgxParam = /\/:(\w+)/g
+  var missingParamErr = null
+
+  path = path.replace(rgxParam, function (hit) {
+    var paramName = hit.slice(2)
+    var suppliedVal = params[paramName]
+    if (!suppliedVal) {
+      throw new Error('Mastodon: Params object is missing a required parameter for this request: `'+paramName+'`')
+    }
+    var retVal = '/' + suppliedVal
+    delete params[paramName]
+    return retVal
+  })
+  return path
+}
+
+/**
+ * When Mastodon returns a response that looks like an error response,
+ * use this function to attach the error info in the response body to `err`.
+ *
+ * @param  {Error} err   Error instance to which body info will be attached
+ * @param  {Object} body JSON object that is the deserialized HTTP response body received from Mastodon
+ * @return {Undefined}
+ */
+exports.attachBodyInfoToError = function (err, body) {
+  err.mastodonReply = body;
+  if (!body) {
+    return
+  }
+  if (body.error) {
+    // the body itself is an error object
+    err.message = body.error
+    err.allErrors = err.allErrors.concat([body])
+  } else if (body.errors && body.errors.length) {
+    // body contains multiple error objects
+    err.message = body.errors[0].message;
+    err.code = body.errors[0].code;
+    err.allErrors = err.allErrors.concat(body.errors)
+  }
+}
+
+exports.makeMastodonError = function (message) {
+  var err = new Error()
+  if (message) {
+    err.message = message
+  }
+  err.code = null
+  err.allErrors = []
+  err.mastodonReply = null
+  return err
+}