case sensitive!

src/components/MarkdownEditor/MarkdownEditor.js

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+import React from 'react';
+import Codemirror from 'react-codemirror';
+import 'codemirror/mode/gfm/gfm';
+import 'codemirror/mode/javascript/javascript';
+import 'codemirror/addon/edit/continuelist';
+import 'codemirror/addon/display/placeholder.js';
+import Dropzone from 'react-dropzone';
+
+import ClickablePadding from './components/ClickablePadding';
+
+import styles from './MarkdownEditor.scss';
+import './codemirror.scss';
+
+import { client } from '../../utils/ApiClient';
+
+class MarkdownAtlas extends React.Component {
+  static propTypes = {
+    text: React.PropTypes.string,
+    onChange: React.PropTypes.func,
+    replaceText: React.PropTypes.func,
+  }
+
+  getEditorInstance = () => {
+    return this.refs.editor.getCodeMirror();
+  }
+
+  onChange = (newText) => {
+    if (newText !== this.props.text) {
+      this.props.onChange(newText);
+    }
+  }
+
+  componentDidMount = () => {
+    console.log(this.props);
+  }
+
+  onDropAccepted = (files) => {
+    const file = files[0];
+    const editor = this.getEditorInstance();
+
+    const cursorPosition = editor.getCursor();
+    const insertOnNewLine = cursorPosition.ch !== 0;
+    let newCursorPositionLine;
+
+    // Lets set up the upload text
+    const pendingUploadTag = `![${file.name}](Uploading...)`;
+    if (insertOnNewLine) {
+      editor.replaceSelection('\n' + pendingUploadTag + '\n');
+      newCursorPositionLine = cursorPosition.line + 3;
+    } else {
+      editor.replaceSelection(pendingUploadTag + '\n');
+      newCursorPositionLine = cursorPosition.line + 2;
+    }
+    editor.setCursor(newCursorPositionLine, 0);
+
+    client.post('/user.s3Upload', {
+      kind: file.type,
+      size: file.size,
+      filename: file.name,
+    })
+    .then(response => {
+      const data = response.data;
+      // Upload using FormData API
+      let formData = new FormData();
+
+      for (let key in data.form) {
+        formData.append(key, data.form[key]);
+      }
+
+      if (file.blob) {
+        formData.append('file', file.file);
+      } else {
+        formData.append('file', file);
+      }
+
+      fetch(data.upload_url, {
+        method: 'post',
+        body: formData
+      })
+      .then(s3Response => {
+        this.props.replaceText(pendingUploadTag, `![${file.name}](${data.asset.url})`);
+        editor.setCursor(newCursorPositionLine, 0);
+      })
+      .catch(err => {
+        this.props.replaceText(pendingUploadTag, '');
+        editor.setCursor(newCursorPositionLine, 0);
+      });
+    });
+  }
+
+  onPaddingTopClick = () => {
+    const cm = this.getEditorInstance();
+    console.log(cm)
+    cm.setCursor(0, 0);
+    cm.focus();
+  }
+
+  onPaddingBottomClick = () => {
+    const cm = this.getEditorInstance();
+    cm.setCursor(cm.lineCount(), 0);
+    cm.focus();
+  }
+
+  render = () => {
+    const options = {
+      readOnly: false,
+      lineNumbers: false,
+      mode: 'gfm',
+      matchBrackets: true,
+      lineWrapping: true,
+      viewportMargin: Infinity,
+      theme: 'atlas',
+      extraKeys: {
+        Enter: 'newlineAndIndentContinueMarkdownList',
+      },
+      placeholder: "# Start with a title...",
+    };
+
+    // http://codepen.io/lubelski/pen/fnGae
+    // TODO:
+    // - Emojify
+    return (
+      <Dropzone
+        onDropAccepted={this.onDropAccepted}
+        disableClick={true}
+        multiple={false}
+        accept={'image/*'}
+        className={styles.container}
+      >
+        <ClickablePadding onClick={ this.onPaddingTopClick } />
+        <Codemirror
+          value={this.props.text}
+          onChange={this.onChange}
+          options={options}
+          ref="editor"
+          className={styles.codeMirrorContainer}
+        />
+        <ClickablePadding onClick={ this.onPaddingBottomClick } />
+      </Dropzone>
+    );
+  }
+}
+
+export default MarkdownAtlas;