Merge pull request #1 from codex-editor/initial-version

alpha version

.gitignore

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 node_modules/*
 npm-debug.log
 .idea/
-.DS_Store
+.DS_Store

README.md

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+![](https://badgen.net/badge/CodeX%20Editor/v2.0/blue)
+
+# Image Tool
+
+Image Block for the [CodeX Editor](https://ifmo.su/editor).
+
+![](https://capella.pics/63a03d04-3816-45b2-87b2-d85e556f0066.jpg)
+
+## Features
+
+- Uploading file from the device
+- Pasting copied content from the web
+- Pasting images by drag-n-drop
+- Allows to add border, background
+- Allows to stretch image to the container's full-width 
+
+**Note** This Tool requires server-side implementation for file uploading. See [backend response format](#server-format) for more details.
+
+## Installation
+
+### Install via NPM
+
+Get the package
+
+```shell
+npm i --save-dev codex.editor.image
+```
+
+Include module at your application
+
+```javascript
+const ImageTool = require('codex.editor.image');
+```
+
+### Download to your project's source dir
+
+1. Upload folder `dist` from repository
+2. Add `dist/bundle.js` file to your page.
+
+### Load from CDN
+
+You can load specific version of package from [jsDelivr CDN](https://www.jsdelivr.com/package/npm/codex.editor.image).
+
+`https://cdn.jsdelivr.net/npm/codex.editor.image@1.0.0`
+
+Then require this script on page with CodeX Editor through the `<script src=""></script>` tag.
+
+## Usage
+
+Add a new Tool to the `tools` property of the CodeX Editor initial config.
+
+```javascript
+var editor = CodexEditor({
+  ...
+
+  tools: {
+    ...
+    image: {
+      class: ImageTool,
+      config: {
+        url: 'http://localhost:8008/', // Your backend uploader endpoint 
+      }
+    }
+  }
+
+  ...
+});
+```
+
+## Config Params 
+
+| Field | Type     | Description        |
+| ----- | -------- | ------------------ |
+| url   | `string` | **Required** Path for file uploading |
+| field | `string` | (default: `image`) Name of uploaded image field in POST request |
+| types | `string` | (default: `image/*`) Mime-types of files that can be [accepted with file selection](https://github.com/codex-team/ajax#accept-string).|
+| captionPlaceholder | `string` | (default: `Caption`) Placeholder for Caption input |
+
+## Tool's settings
+
+![](https://capella.pics/c74cdeec-3405-48ac-a960-f784188cf9b4.jpg)
+
+1. Add border
+
+2. Stretch to full-width
+
+3. Add background
+
+## Output data
+
+This Tool returns `data` with following format
+
+| Field          | Type      | Description                     |
+| -------------- | --------- | ------------------------------- |
+| file           | `object`  | Uploaded file data. Any data got from backend uploader. Always contain the `url` property |
+| caption        | `string`  | image's caption                 |
+| withBorder     | `boolean` | add border to image             |
+| withBackground | `boolean` | need to add background          |
+| stretched      | `boolean` | stretch image to screen's width |
+
+
+```json
+{
+    "type" : "image",
+    "data" : {
+        "file": {
+            "url" : "https://www.tesla.com/tesla_theme/assets/img/_vehicle_redesign/roadster_and_semi/roadster/hero.jpg"
+        },
+        "caption" : "Roadster // tesla.com",
+        "withBorder" : false,
+        "withBackground" : false,
+        "stretched" : true
+    }
+}
+```
+
+## Backend response format <a name="server-format"></a>
+
+This Tool works by following scheme:
+
+1. User select file from the device
+2. Tool sends it to **your** backend 
+3. Your backend should save file and return file data with JSON at specified format.
+4. Image tool shows saved image and stores server answer
+
+So, you can implement backend for file saving by your own way. It is a specific and trivial task depending on your
+environment and stack.
+
+Response of your uploader **should** cover following format:
+
+```json5
+{
+    "success" : 1,
+    "file": {
+        "url" : "https://www.tesla.com/tesla_theme/assets/img/_vehicle_redesign/roadster_and_semi/roadster/hero.jpg",
+        // ... and any additional fields you want
+    }
+}
+```
+
+**success** - uploading status. 1 for successful, 0 for failed
+
+**file** - uploaded file data. **Must** contain an `url` field with full public path to the uploaded image. 
+Also, can contain any additional fields you want to store. For example, width, height, id etc. 
+All additional fields will be saved at the `file` object of output data.    
+
+