Re-add APIError file contents

src/api/utils/APIError.js

@@ -0,0 +1,46 @@
+const httpStatus = require('http-status');
+
+/**
+ * @extends Error
+ */
+class ExtendableError extends Error {
+  constructor({
+    message, errors, status, isPublic, stack,
+  }) {
+    super(message);
+    this.name = this.constructor.name;
+    this.message = message;
+    this.errors = errors;
+    this.status = status;
+    this.isPublic = isPublic;
+    this.isOperational = true; // This is required since bluebird 4 doesn't append it anymore.
+    this.stack = stack;
+    // Error.captureStackTrace(this, this.constructor.name);
+  }
+}
+
+/**
+ * Class representing an API error.
+ * @extends ExtendableError
+ */
+class APIError extends ExtendableError {
+  /**
+   * Creates an API error.
+   * @param {string} message - Error message.
+   * @param {number} status - HTTP status code of error.
+   * @param {boolean} isPublic - Whether the message should be visible to user or not.
+   */
+  constructor({
+    message,
+    errors,
+    stack,
+    status = httpStatus.INTERNAL_SERVER_ERROR,
+    isPublic = false,
+  }) {
+    super({
+      message, errors, status, isPublic, stack,
+    });
+  }
+}
+
+module.exports = APIError;