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 # Noah
-Scheduling as a service.
+[![Build Status](https://travis-ci.org/deepakpathania/Noah.svg?branch=development)](https://travis-ci.org/deepakpathania/Noah) [![Coverage Status](https://coveralls.io/repos/github/deepakpathania/Noah/badge.svg)](https://coveralls.io/github/deepakpathania/Noah) ![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)
+
+Noah is a **scheduling service** that allows you to register tasks for making an *outbound request* after a *recurring interval*.
+- It allows you to configure the request to accept query params, headers and request body and accepts a human-readable interval to invoke the request.
+- It exposes a REST API for CRUD on schedules backed with a MySQL database for persistence. Refer to API section below for details.
+
+### Usage
+Noah is supposed to be used as a self-hosted service for your scheduling needs. Here's how you can set it up.
+1. After cloning, install the dependencies.
+	```js
+    npm i
+    ```
+2. Create a `.env` file in the root directory and add the following environment variables.
+
+    ```
+    MYSQL_HOST
+    MYSQL_USER
+    MYSQL_PASSWORD
+    MYSQL_DB_NAME
+    MYSQL_TEST_DB_NAME
+    ```
+3. Create the databases you have specified in the `.env` file. 
+	```mysql
+    CREATE DATABASE IF NOT EXISTS MYSQL_DB_NAME;
+    ```
+   You don't need to create the tables explicitly, `sails` does that for you based on the models when you lift the server.
+
+3. Lift the server.
+    ```js
+    node app.js
+    ```
+
+4. Test whether the server was lifted properly by making a call to the health check endpoint : `{{url}}/knockknock`
+
+### API
+Noah exposes the following APIs to interact with the system.
+1. **Create Schedule** - Allows you to register a schedule with the system.
+    - Endpoint - `/v1/schedules`
+    - Method - `POST`
+    - Request Body:
+      ```js
+      {
+        "request": {
+          "url": "{{targetUrl}}",
+          "method": "{{method}}",
+          "data": {
+            "params": {
+                "key": "value"
+            },
+            "headers": {},
+            "body": {}
+          }
+        },
+        "period": {
+          "every": 2,
+          "interval": "{{interval}}"
+        },
+        "start": true
+      }
+      ```
+        - `request` is a required field. It includes the following required fields:
+            - `url` (string)- specifies the target URL to be called.
+            - `method` (string)- specifies the request method for calling the URL, eg. `GET`. 
+    Accepts one of the following values `['GET', 'HEAD', 'POST', 'PUT', 'PATCH', 'DELETE']`
+            - `data` (object) - specifies the request data to be sent with the request. Send `{}` in case of no data. Each data item is an object that accepts key-value pairs.
+
+            **Note** - `body` accepts only raw format for now with json data, `application/json` header is added implicitly.
+ 
+        - `period` is a required field. It includes the following required fields:
+          - `every` (integer) - represents the frequency of invocation, for eg. every 2 hours.
+          - `interval` (string) - represents the time interval between invocations.
+    Accepts one of the following values `['hours', 'days', 'weeks', 'months']`
+
+        - `start` is an optional boolean field, false by default. Represents whether or not a request should be made at the time of registering the schedule.
+    - Returns - unique identfier for the created schedule.
+      ```js
+      {
+        "data": {
+          "id": "88b6ba474b76df6ab866111fc3284ab0"
+        },
+        "meta": {}
+      }
+      ``` 
+ 
+2. **Update Schedule** - Allows updating the existing schedules based on their unique identifiers.
+  - Endpoint - `/v1/schedules/{{identifier}}`
+  - Method - `PUT`
+  - Request body is similar to create schedule with the following exceptions:
+    - `start` is not accepted.
+    - In case you want to edit a `request` or `period` field, entire object needs to be sent.
+    For example, for updating period from every 2 hours, to every 3 hours, request body would be:
+      ```js
+      {
+        "period": {
+          "every": 3,
+          "interval": "hours"
+        }
+      }
+      ```
+      **Note** Period changes would start reflecting from next cycle onwards.
+
+3. **Get all schedules** - Fetches all active schedules.
+  - Endpoint - `/v1/schedules`
+  - Method - `GET`
+  - Returns - An array of all active schedules.
+    ```js
+    {
+      "data": [
+        {
+          "identifier": "64a623fd6b35f435dfb5fde03df2d4ed",
+          "nextRunningTime": 1570435680068,
+          "request": {
+            "url": "http://localhost:3000/v1/blogs/29",
+            "method": "GET",
+            "data": {
+              "params": {},
+              "headers": {},
+              "body": {}
+            }
+          },
+          "period": {
+            "every": 2,
+            "interval": "hours"
+          }
+        }
+      ],
+      "meta": {
+        "filter": "active"
+      }
+    }
+    ```
+
+4. **Get run history of schedule** - Fetches all the run histories for the specified schedule.
+  - Endpoint - `/v1/schedules/{{identifier}}`
+  - Method - `GET`
+  - Returns - An array of run history for the schedule.
+    ```js
+    {
+      "data": [
+        {
+          "id": 1,
+          "runTime": 1570428480068,
+          "responseStatusCode": 200
+        }
+      ],
+      "meta": {}
+    }
+    ```
+
+5. **Delete a schedule** - Marks a schedule as inactive.
+  - Endpoint - `/v1/schedules/{{identifier}}`
+  - Method - `DELETE`
+
+
+### Contributing
+Please refer to the [issue tracker](https://github.com/deepakpathania/Noah/issues) in case you'd like to contribute. Also, feel free to open feature requests/bug reports in case you face any.
+