Merge pull request #52 from pierotofy/pagination

Pagination

app/static/app/css/main.scss

@@ -94,6 +94,40 @@ ul#side-menu.nav{
     z-index: 999999;
 }
 
+.pagination{
+    margin: 0;
+
+    li>a{
+        color: black;
+        border: 1px solid #ecf0f1;
+        background-color: #fff;
+        &:hover, &:focus{
+            background-color: #798d8f;
+        }
+    }
+    .disabled > a{
+        background-color: #fff;
+        border: 1px solid #f4f9f5;
+        &:hover, &:focus{
+            background-color: #fff;
+            border: 1px solid #f4f9f5;
+        }
+    }
+    .active > a{
+        background-color: #798d8f;
+        &:hover, &:focus{
+            background-color: #798d8f;
+        }
+    }  
+
+    &.pagination-sm{
+        a{
+            padding-top: 2px;
+            padding-bottom: 2px;
+        }
+    }
+}
+
 table.table-first-col-bold{
     td:first-child{
         font-weight: bold;

app/static/app/js/Console.jsx

@@ -2,7 +2,7 @@ import React from 'react';
 import './css/Console.scss';
 import './vendor/google-code-prettify/prettify';
 import './vendor/google-code-prettify/prettify.css';
-import update from 'react-addons-update';
+import update from 'immutability-helper';
 import Utils from './classes/Utils';
 
 class Console extends React.Component {

app/static/app/js/Dashboard.jsx

@@ -42,12 +42,13 @@ class Dashboard extends React.Component {
               Add Project
             </button>
           </div>
+
           <EditProjectDialog 
             saveAction={this.addNewProject}
             ref={(domNode) => { this.projectDialog = domNode; }}
             />
           <ProjectList 
-            source="/api/projects/?ordering=-created_at"
+            source="/api/projects/?ordering=-created_at&page=#{PAGE}"
             ref={(domNode) => { this.projectList = domNode; }} />
         </div>
     );

app/static/app/js/components/EditProjectDialog.jsx

@@ -60,7 +60,8 @@ class EditProjectDialog extends React.Component {
     }
 
     componentWillUnmount(){
-        $(this.modal).off('hidden.bs.modal hidden.bs.modal');
+        $(this.modal).off('hidden.bs.modal hidden.bs.modal')
+                     .modal('hide');
     }
 
     componentDidUpdate(){

app/static/app/js/components/Map.jsx

@@ -2,7 +2,7 @@ import React from 'react';
 import '../css/Map.scss';
 import 'leaflet/dist/leaflet.css';
 import Leaflet from 'leaflet';
-import async from 'async/dist/async';
+import async from 'async';
 import 'leaflet-measure/dist/leaflet-measure.css';
 import 'leaflet-measure/dist/leaflet-measure';
 import '../vendor/leaflet/L.Control.MousePosition.css';

app/static/app/js/components/Paginated.jsx

@@ -0,0 +1,83 @@
+import React from 'react';
+import update from 'immutability-helper';
+
+class Paginated extends React.Component{
+  constructor(){
+    super();
+    this.handlePageChange = this.handlePageChange.bind(this);
+  }
+
+  updatePagination(itemsPerPage, totalItems){
+    let currentPage = 1;
+    const totalPages = this.totalPages(itemsPerPage, totalItems);
+
+    if (this.state.pagination && this.state.pagination.currentPage !== undefined){
+      currentPage = this.state.pagination.currentPage;
+    }
+
+    if (currentPage > totalPages) currentPage = totalPages;
+
+    this.setState({pagination: {
+        switchingPages: false,  
+        itemsPerPage: itemsPerPage,
+        totalItems: totalItems,
+        currentPage: currentPage
+      }
+    });
+  }
+
+  totalPages(itemsPerPage, totalItems){
+    return Math.ceil(totalItems / itemsPerPage);
+  }
+
+  getPaginatedUrl(base){
+    const page = this.state.pagination && this.state.pagination.currentPage !== undefined
+                 ? this.state.pagination.currentPage 
+                 : 1;
+
+    return base.replace(/#\{PAGE\}/g, page);
+  }
+
+  setPaginationState(props, done){
+    this.setState(update(this.state, {
+      pagination: {
+        $merge: props
+      }
+    }), done);
+  }
+
+  handlePageChange(pageNum){
+    return (e) => {
+      // Update current page, once rendering is completed, raise 
+      // on page changed event
+      this.setPaginationState({
+          currentPage: pageNum,
+          switchingPages: true
+        }, () => {
+          if (this.onPageChanged) this.onPageChanged(pageNum);
+        });
+    }
+  }
+
+  handlePageItemsNumChange(delta, needsRefreshCallback){
+    const pagesBefore = this.totalPages(this.state.pagination.itemsPerPage, this.state.pagination.totalItems),
+          pagesAfter = this.totalPages(this.state.pagination.itemsPerPage, this.state.pagination.totalItems + delta);
+    let currentPage = this.state.pagination.currentPage;
+
+    if (currentPage > pagesAfter) currentPage = pagesAfter;
+
+    this.setPaginationState({
+      totalItems: this.state.pagination.totalItems + delta,
+      currentPage: currentPage
+    }, () => {
+      if (pagesBefore !== pagesAfter) needsRefreshCallback(pagesAfter);
+    });
+  }
+
+  render(){
+    throw new Error("Override me");
+  }
+} 
+
+export default Paginated;
+

app/static/app/js/components/Paginator.jsx

@@ -0,0 +1,45 @@
+import React from 'react';
+import $ from 'jquery';
+
+class Paginator extends React.Component {
+    render() {
+        const { itemsPerPage, totalItems, currentPage } = this.props;
+        let paginator = null;
+
+        if (itemsPerPage && itemsPerPage && totalItems > itemsPerPage){
+            const numPages = Math.ceil(totalItems / itemsPerPage),
+                  pages = [...Array(numPages).keys()]; // [0, 1, 2, ...numPages]
+
+            paginator = (
+                <div className={this.props.className}>
+                    <ul className="pagination pagination-sm">
+                        <li className={currentPage === 1 ? "disabled" : ""}>
+                          <a href="javascript:void(0);" onClick={this.props.handlePageChange(1)}>
+                            <span>&laquo;</span>
+                          </a>
+                        </li>
+                        {pages.map(page => {
+                            return (<li     
+                                key={page + 1}
+                                className={currentPage === (page + 1) ? "active" : ""}
+                            ><a href="javascript:void(0);" onClick={this.props.handlePageChange(page + 1)}>{page + 1}</a></li>);
+                        })}
+                        <li className={currentPage === numPages ? "disabled" : ""}>
+                          <a href="javascript:void(0);" onClick={this.props.handlePageChange(numPages)}>
+                            <span>&raquo;</span>
+                          </a>
+                        </li>
+                    </ul>
+                </div>
+                );
+        }
+
+        return (<div>
+            {paginator}
+            {this.props.children}
+            {paginator}
+        </div>);
+    }
+}
+
+export default Paginator;

app/static/app/js/components/ProjectList.jsx

@@ -1,18 +1,25 @@
 import React from 'react';
 import $ from 'jquery';
+import '../css/ProjectList.scss';
 
 import ProjectListItem from './ProjectListItem';
+import Paginated from './Paginated';
+import Paginator from './Paginator';
+import ErrorMessage from './ErrorMessage';
 
-class ProjectList extends React.Component {
+class ProjectList extends Paginated {
     constructor(){
         super();
 
         this.state = {
             loading: true,
+            refreshing: false,
             error: "",
-            projects: null
+            projects: []
         }
 
+        this.PROJECTS_PER_PAGE = 10;
+
         this.handleDelete = this.handleDelete.bind(this);
     }
 
@@ -21,14 +28,17 @@ class ProjectList extends React.Component {
     }
 
     refresh(){
+        this.setState({refreshing: true});
+
         // Load projects from API
         this.serverRequest = 
-            $.getJSON(this.props.source, json => {
+            $.getJSON(this.getPaginatedUrl(this.props.source), json => {
                 if (json.results){
                     this.setState({
                         projects: json.results,
                         loading: false
                     });
+                    this.updatePagination(this.PROJECTS_PER_PAGE, json.count);
                 }else{
                     this.setState({ 
                         error: `Invalid JSON response: ${JSON.stringify(json)}`,
@@ -41,8 +51,14 @@ class ProjectList extends React.Component {
                     error: `Could not load projects list: ${textStatus}`,
                     loading: false
                 });
+            })
+            .always(() => {
+                this.setState({refreshing: false});
             });
+    }
 
+    onPageChanged(pageNum){
+        this.refresh();
     }
 
     componentWillUnmount(){
@@ -52,22 +68,25 @@ class ProjectList extends React.Component {
     handleDelete(projectId){
         let projects = this.state.projects.filter(p => p.id !== projectId);
         this.setState({projects: projects});
+        this.handlePageItemsNumChange(-1, () => {
+            this.refresh();
+        });
     }
 
     render() {
         if (this.state.loading){
-            return (<div>Loading projects... <i className="fa fa-refresh fa-spin fa-fw"></i></div>);
-        }
-        else if (this.state.projects){
-            return (<ul className="list-group">
+            return (<div className="project-list">Loading projects... <i className="fa fa-refresh fa-spin fa-fw"></i></div>);
+        }else{
+            return (<div className="project-list">
+                  <ErrorMessage bind={[this, 'error']} />
+                  <Paginator className="text-right" {...this.state.pagination} handlePageChange={this.handlePageChange.bind(this)}>
+                    <ul className={"list-group project-list " + (this.state.refreshing ? "refreshing" : "")}>
                         {this.state.projects.map(p => (
                             <ProjectListItem key={p.id} data={p} onDelete={this.handleDelete} /> 
                         ))}
-                </ul>);
-        }else if (this.state.error){
-            return (<div>An error occurred: {this.state.error}</div>);
-        }else{
-            return (<div></div>); // should never happen
+                    </ul>
+                </Paginator>
+            </div>);
         }
     }
 }

app/static/app/js/components/ProjectListItem.jsx

@@ -1,6 +1,6 @@
 import '../css/ProjectListItem.scss';
 import React from 'react';
-import update from 'react-addons-update';
+import update from 'immutability-helper';
 import TaskList from './TaskList';
 import EditTaskPanel from './EditTaskPanel';
 import UploadProgressBar from './UploadProgressBar';

app/static/app/js/css/Dashboard.scss

@@ -14,7 +14,7 @@
         }
     }
 
-    .add-button{
+    .add-button, .list-group{
         margin-bottom: 8px;
     }
 }

app/static/app/js/css/ProjectList.scss

@@ -0,0 +1,6 @@
+.project-list{
+    ul.project-list.refreshing{
+        opacity: 0.5;
+        pointer-events: none;
+    }
+}

package.json

@@ -30,12 +30,12 @@
     "css-loader": "^0.25.0",
     "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.9.0",
+    "immutability-helper": "^2.0.0",
     "leaflet": "^1.0.1",
     "leaflet-measure": "^2.0.5",
     "node-sass": "^3.10.1",
     "object.values": "^1.0.3",
     "react": "^15.3.2",
-    "react-addons-update": "^15.3.2",
     "react-dom": "^15.3.2",
     "react-hot-loader": "^3.0.0-beta.5",
     "sass-loader": "^4.0.2",