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+# Menui
+
+#### Usage guidelines
+
+<br>
+
+## **1. Data structures**
+
+#### Model schemes used in backend.
+
+<br>
+
+- ### **Restaurant**
+
+  - ##### **\_id**: _mongoose.Types.ObjectId_
+  - ##### **name**: _String_ (max: 128, required)
+  - ##### **city**: _String_ (max: 128, required)
+  - ##### **adress**: _String_ (max: 128, required)
+  - ##### **location**
+    - ##### **type**: _String_ (enum: ["Point"], required)
+    - ##### **coordinates**: [Number] required
+  - ##### **imgUrl**: _String_ (required)
+  - ##### **workingHours**: _String_ (required)
+  - ##### **description**: _String_
+  - ##### **tags**
+    - ##### **cardPayments**: _Boolean_
+    - ##### **petFriendly**: *B*oolean\*
+    - ##### **glutenFree**: _Boolean_
+    - ##### **vegan**: _Boolean_
+    - ##### **vegetarian**: _Boolean_
+    - ##### **alcohol**: _Boolean_
+    - ##### **delivery**: _Boolean_
+  - ##### **links**
+    - ##### **facebook**: _String_
+    - ##### **twitter**: _String_
+    - ##### **instagram**: _String_
+    - ##### **www**: _String_
+  - ##### **phone**: _Number_
+  - ##### **hidden**: _Boolean_
+  - ##### **subscriptionActive**: _Boolean_
+  - ##### **subscriptionStarted**: _String_
+  - ##### **subscriptionDue**: _String_
+  - ##### **dishes**: [*mongoose.Types.ObjectId*]
+  <br>
+
+- ### **Dish**
+
+  - ##### **\_id**: _mongoose.Types.ObjectId_
+  - ##### **name**: _String_ (max: 128, required)
+  - ##### **category**: _String_ (max: 64, required)
+  - ##### **price**: _Number_ (required)
+  - ##### **notes**: _String_ (max: 128)
+  - ##### **imgUrl**: _String_ (required)
+  - ##### **hidden**: _Boolean_
+  - ##### **weight**: _Number_
+  - ##### **allergens**
+    - ##### **gluten**: _Boolean_
+    - ##### **lactose**: _Boolean_
+    - ##### **soy**: _Boolean_
+    - ##### **eggs**: _Boolean_
+    - ##### **seaFood**: _Boolean_
+    - ##### **peanuts**: _Boolean_
+    - ##### **sesame**: _Boolean_
+  - ##### **ingredients**: [*String*]
+  - ##### **vegan**: _Boolean_
+  - ##### **vegetarian**: _Boolean_
+  <br>
+
+- ### **User**
+  - ##### **\_id**: _mongoose.Types.ObjectId_
+  - ##### **email**: _String_ (required)
+  - ##### **password**: _String_ (required)
+  - ##### **firstname**: _String_ (required)
+  - ##### **lastname**: _String_ (required)
+  - ##### **restaurants**: [*mongoose.Types.ObjectId*]
+  - ##### **trialUsed**: _Boolean_
+  <br>
+
+## **2. API**
+
+<br>
+
+- ### **/dish**
+
+  - #### **GET**
+    Takes a **dishId** query and if dish exists in a database, returns a **JSON**. Else returns **404**.
+  - #### **POST**
+    Takes in **restaurantId**, **dish** document, and a JWT **token (header)** as parameters and tries to create a new dish document inside a database. Returns **201** on success. Else returns **401** on bad token, or **400** on wrong **restaurantId**.
+  - #### **PUT**
+
+    Takes in **dishId**, **dish** document, and a JWT **token (header)** and tries to update specified document in a database. Returns **304** on success. Else returns **204** on bad document, or **401** on bad token.
+
+    <br>
+
+* ### **/restaurant**
+
+  - #### **GET**
+    Takes **restaurantId** query and returns a specific restaurant **JSON** if found. Else returns **400** if restaurantId is invalid, or **404** if specified restaurantId is not found.
+  - #### **POST**
+    Takes a **restaurant** document, and JWT **token (header)**, tries to create new restaurant in a database, and also add it to user restaurants list. Returns **201** on success. Else returns **401** on invalid token, and **400** on general error while adding restaurant.
+  - #### **PUT** - empty!
+
+  <br>
+
+- ### **/restaurant/dishes**
+
+  - #### **GET**
+
+    Takes a **restaurantId** query and returns **all** dishes from a restaurant in a single **JSON** document. If failed returns **400** on invalid restaurant ID, **404** on restaurant not found, and **500** on general server error.
+
+    <br>
+
+* ### **/img**
+
+  - #### **POST**
+
+    Takes an **image** in the form of a **multipart/form-data**, a JWT **token (header)** and tries to save the image to the cloud. If succeeded, returns a **imgURL** string and a **200** response code. Else returns **401** for invalid token, **204** for no image, and **500** for unknown error.
+
+    <br>
+
+- ### **/user/login**
+
+  - #### **POST**
+
+    Takes **email** and **password** parameters and returns an **JWT** token and basic user **data** if succeeded. Else returns **404** for no such user, **401** on wrong password, and **500** on general server error.
+
+    <br>
+
+* ### **/user/register**
+
+  - #### **POST**
+
+    Takes **email, password, firstname, lastname** parameters and tries to register the user in the database. Returns **201** if succeeded. Else returns **409** on email taken, and **500** on unknown error.
+
+    <br>
+
+- ### **/search**
+
+  - #### **GET**
+
+    Takes a **string** query and returns and array of **JSON** documents with restaurants which names or cities contain specified string query. If nothing found returns nothing. Else returns **500** for unknown error\*\*.
+
+    <br>
+
+* ### **/search/autocomplete**
+
+  - #### **GET**
+
+    Takes a **string** query and returns an **array** of cities and names (cities first) matching specified query. Returns nothing if nothing found.
+
+    <br>
+
+## **3. Important functions**
+
+</br>
+
+- #### **newError(message, status)**
+
+  Returns an error object to be handled by "handleError" function.
+  </br>
+
+- #### **handleError(error, responseObject)**
+  Takes the error message and status from the error object and sends it via the supplied express response object.
+  </br>