Initial git

app/components/Img.jsx

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+// - Import react components
+import React, { Component } from 'react'
+import PropTypes from 'prop-types'
+import { connect } from 'react-redux'
+import SvgImage from 'material-ui/svg-icons/image/image'
+
+
+// - Import app components
+
+
+// - Import API
+
+// - Import actions
+import * as imageGalleryActions from 'imageGalleryActions'
+
+/**
+ * Create component class
+ */
+export class Img extends Component {
+
+  static propTypes = {
+
+    /**
+     * Use for getting url address from server
+     */
+    fileName: PropTypes.string,
+    /**
+     * Avatar style
+     */
+    style: PropTypes.object
+  }
+
+  /**
+   * Component constructor
+   * @param  {object} props is an object properties of component
+   */
+  constructor(props) {
+    super(props)
+
+    //Defaul state
+    this.state = {
+      isImageLoaded: false
+    }
+
+    // Binding functions to `this`
+    this.getImageURL = this.getImageURL.bind(this)
+    this.handleLoadImage = this.handleLoadImage.bind(this)
+
+  }
+
+  /**
+   * Will be called on loading image
+   * 
+   * @memberof Img
+   */
+  handleLoadImage = () => {
+    this.setState({
+      isImageLoaded: true
+    })
+  }
+
+  /**
+   * Get image url if it is not exist on redux store
+   * 
+   * @memberof Img
+   */
+  getImageURL = () => {
+    let { fileName } = this.props
+    if (fileName && fileName !== '') {
+      if (this.props.imageRequests.indexOf(fileName) > -1)
+        return
+      this.props.getImage(fileName)
+
+    }
+  }
+
+  componentWillMount() {
+    let { fileName } = this.props
+
+    if (this.props.imageRequests.indexOf(fileName) > -1)
+      return
+    this.getImageURL()
+  }
+
+  /**
+   * Reneder component DOM
+   * @return {react element} return the DOM which rendered by component
+   */
+  render() {
+    const styles = {
+      loding: {
+        display: 'flex',
+        justifyContent: 'center',
+        alignItems: 'center',
+        width: '100%',
+        height: '100px',
+        position: 'relative',
+        color: '#cacecd',
+        fontWeight: 100
+      },
+      loadingContent: {
+        display: 'flex',
+        flexDirection: 'column',
+        alignItems: 'center'
+      },
+      loadingImage: {
+        fill: 'aliceblue',
+        width: '50px',
+        height: '50px'
+      }
+    }
+
+    let { fileName, style } = this.props
+    let { isImageLoaded } = this.state
+    return (
+      <div>
+        <img onLoad={this.handleLoadImage} src={this.props.avatarURL[fileName] || ''} style={isImageLoaded ? style : { display: 'none' }} />
+        <div style={{ backgroundColor: 'blue' }} style={isImageLoaded ? { display: 'none' } : styles.loding}>
+          <div style={styles.loadingContent}>
+            <SvgImage style={styles.loadingImage} />
+            <div>Image has not loaded</div>
+          </div>
+        </div>
+      </div>
+    )
+  }
+}
+
+
+
+/**
+ * Map dispatch to props
+ * @param  {func} dispatch is the function to dispatch action to reducers
+ * @param  {object} ownProps is the props belong to component
+ * @return {object}          props of component
+ */
+const mapDispatchToProps = (dispatch, ownProps) => {
+  return {
+    getImage: (name) => dispatch(imageGalleryActions.dbDownloadImage(name))
+
+  }
+}
+
+/**
+ * Map state to props
+ * @param  {object} state is the obeject from redux store
+ * @param  {object} ownProps is the props belong to component
+ * @return {object}          props of component
+ */
+const mapStateToProps = (state, ownProps) => {
+  return {
+    avatarURL: state.imageGallery.imageURLList,
+    imageRequests: state.imageGallery.imageRequests
+  }
+}
+
+// - Connect component to redux store
+export default connect(mapStateToProps, mapDispatchToProps)(Img)