From 4d0c0e4b2d1600d65a3936be1b88e692188e2c34 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Sat, 6 Apr 2024 08:41:24 -0700
Subject: New React based simple app

---
 web/simple/app.js     | 140 -------------------------------
 web/simple/index.html | 223 ++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 217 insertions(+), 146 deletions(-)
 delete mode 100644 web/simple/app.js

diff --git a/web/simple/app.js b/web/simple/app.js
deleted file mode 100644
index 0c44bae5..00000000
--- a/web/simple/app.js
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-if (!Array.prototype.find) {
-  Object.defineProperty(Array.prototype, "find", {
-    value: function(predicate) {
-      var value;
-      for (var i = 0; i < this.length; i++) {
-        value = this[i];
-        if (predicate.call(arguments[1], value, i, this)) {
-          return value;
-        }
-      }
-      return undefined;
-    }
-  });
-}
-
-var getQueryParameter = function(name) {
-	return (window.location.search.match('[?&]' + name + '=([^&]*)') || [])[1];
-};
-
-var url = window.location.protocol + '//' + window.location.host;
-var token = getQueryParameter('token');
-
-var style = function (label) {
-    return new ol.style.Style({
-        image: new ol.style.Circle({
-            fill: new ol.style.Fill({
-                color: 'teal'
-            }),
-            stroke: new ol.style.Stroke({
-                color: 'black',
-                width: 2
-            }),
-            radius: 7
-        }),
-        text: new ol.style.Text({
-            text: label,
-            fill: new ol.style.Fill({
-                color: 'black'
-            }),
-            stroke: new ol.style.Stroke({
-                color: 'white',
-                width: 2
-            }),
-            font: 'bold 12px sans-serif',
-            offsetY: -16
-        })
-    });
-};
-
-var source = new ol.source.Vector();
-
-var markers = {};
-
-var map = new ol.Map({
-    layers: [
-        new ol.layer.Tile({
-            source: new ol.source.OSM()
-        }),
-        new ol.layer.Vector({
-            source: source
-        })
-    ],
-    target: 'map',
-    view: new ol.View({
-        center: ol.proj.fromLonLat([0, 0]),
-        zoom: 2
-    })
-});
-
-var ajax = function (method, url, callback) {
-    var xhr = new XMLHttpRequest();
-    xhr.withCredentials = true;
-    xhr.open(method, url, true);
-    xhr.onreadystatechange = function () {
-        if (xhr.readyState == 4) {
-            callback(JSON.parse(xhr.responseText));
-        }
-    };
-    if (method == 'POST') {
-        xhr.setRequestHeader('Content-type', 'application/json');
-    }
-    xhr.send()
-};
-
-ajax('GET', url + '/api/server', function(server) {
-    ajax('GET', url + '/api/session?token=' + token, function(user) {
-
-        map.getView().setCenter(ol.proj.fromLonLat([
-            parseFloat(getQueryParameter('longitude')) || user.longitude || server.longitude || 0.0,
-            parseFloat(getQueryParameter('latitude')) || user.latitude || server.latitude || 0.0
-        ]));
-        map.getView().setZoom(parseFloat(getQueryParameter('zoom')) || user.zoom || server.zoom || 2);
-
-        ajax('GET', url + '/api/devices', function(devices) {
-
-            var socket = new WebSocket('ws' + url.substring(4) + '/api/socket');
-
-            socket.onclose = function (event) {
-                console.log('socket closed');
-            };
-
-            socket.onmessage = function (event) {
-                var data = JSON.parse(event.data);
-                if (data.positions) {
-                    for (i = 0; i < data.positions.length; i++) {
-                        var position = data.positions[i];
-                        var marker = markers[position.deviceId];
-                        var point = new ol.geom.Point(ol.proj.fromLonLat([position.longitude, position.latitude]));
-                        if (!marker) {
-                            var device = devices.find(function (device) { return device.id === position.deviceId });
-                            marker = new ol.Feature(point);
-                            marker.setStyle(style(device.name));
-                            markers[position.deviceId] = marker;
-                            source.addFeature(marker);
-                        } else {
-                            marker.setGeometry(point);
-                        }
-                    }
-                }
-            };
-
-        });
-    });
-});
diff --git a/web/simple/index.html b/web/simple/index.html
index 01300677..63eec3f7 100644
--- a/web/simple/index.html
+++ b/web/simple/index.html
@@ -1,14 +1,225 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
 <meta charset="UTF-8">
-<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
+<meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Traccar</title>
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.css" type="text/css">
 </head>
 <body style="margin: 0; padding: 0;">
-<div id="map" style="width: 100%; height: 100%; position:fixed;"></div>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.20.1/ol.js" type="text/javascript"></script>
-<script id="loadScript" src="app.js"></script>
+<div id="content" style="width: 100%; height: 100%; position:fixed;">
+<script src="https://unpkg.com/react@17/umd/react.development.js"></script>
+<script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
+<script src="https://unpkg.com/maplibre-gl@4.1.2/dist/maplibre-gl.js"></script>
+<link href="https://unpkg.com/maplibre-gl@4.1.2/dist/maplibre-gl.css" rel="stylesheet">
+<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
+<script type="text/babel">
+
+  const LoginScreen = ({ server, setServer, setUser }) => {
+    const [email, setEmail] = React.useState('');
+    const [password, setPassword] = React.useState('');
+
+    const handleSubmit = (event) => {
+      event.preventDefault();
+      const fetchData = async () => {
+        if (server.newServer) {
+          const response = await fetch('/api/users', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ name: email, email, password }),
+          });
+          if (response.ok) {
+            setServer({ ...server, newServer: false });
+          }
+        } else {
+          const query = `email=${encodeURIComponent(email)}&password=${encodeURIComponent(password)}`;
+          const response = await fetch('/api/session', {
+            method: 'POST',
+            body: new URLSearchParams(query),
+          });
+          if (response.ok) {
+            setUser(await response.json());
+          }
+        }
+      }
+      fetchData();
+    };
+
+    const formStyle = {
+      width: '180px',
+      margin: '16px',
+      display: 'flex',
+      flexDirection: 'column',
+      gap: '8px',
+    };
+
+    return (
+      <form onSubmit={handleSubmit} style={formStyle}>
+        <input
+          value={email}
+          onChange={(e) => setEmail(e.target.value)}
+          placeholder="Email"
+        />
+        <input
+          password={password}
+          onChange={(e) => setPassword(e.target.value)}
+          placeholder="Password"
+          type="password"
+        />
+        <button type="submit">
+          {server.newServer ? 'Register' : 'Login'}
+        </button>
+      </form>
+    );
+  };
+
+  const MainScreen = () => {
+    const mapContainer = React.useRef();
+    const map = React.useRef();
+
+    React.useEffect(() => {
+      map.current = new maplibregl.Map({
+        container: mapContainer.current,
+        style: 'https://demotiles.maplibre.org/style.json',
+        center: [0, 0],
+        zoom: 1,
+      });
+    }, []);
+
+    const [devices, setDevices] = React.useState([]);
+
+    React.useEffect(() => {
+      const fetchData = async () => {
+        const devicesResponse = await fetch('/api/devices');
+        if (devicesResponse.ok) {
+          setDevices(await devicesResponse.json());
+        }
+      }
+      fetchData();
+    }, []);
+
+    const [initialized, setInitialized] = React.useState(false);
+    const [positions, setPositions] = React.useState({});
+
+    React.useEffect(() => {
+      if (initialized) {
+        const url = window.location.protocol + '//' + window.location.host;
+        const socket = new WebSocket('ws' + url.substring(4) + '/api/socket');
+        socket.onmessage = (event) => {
+          const data = JSON.parse(event.data);
+          const updatedPositions = {};
+          data.positions?.forEach((p) => updatedPositions[p.deviceId] = p);
+          setPositions({ ...positions, ...updatedPositions })
+        };
+      }
+    }, [initialized]);
+
+    const handleAddDevice = (event) => {
+      event.preventDefault();
+      const fetchData = async () => {
+        const id = prompt('Enter device id');
+        const response = await fetch('/api/devices', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            name: id,
+            uniqueId: id,
+          }),
+        });
+        if (response.ok) {
+          setDevices([...devices, await response.json()]);
+        }
+      }
+      fetchData();
+    };
+
+    React.useEffect(() => {
+      map.current.on('load', () => {
+        map.current.addSource('points', {
+          type: 'geojson',
+          data: {
+            type: 'FeatureCollection',
+            features: [],
+          },
+        });
+        map.current.addLayer({
+          id: 'points',
+          type: 'circle',
+          source: 'points',
+        });
+        setInitialized(true);
+      });
+    }, []);
+
+    React.useEffect(() => {
+      map.current.getSource('points')?.setData({
+        type: 'FeatureCollection',
+        features: Object.values(positions).map((position) => ({
+          type: 'Feature',
+          geometry: {
+            type: 'Point',
+            coordinates: [position.longitude, position.latitude],
+          },
+        })),
+      });
+    }, [positions]);
+
+    const containerStyle = {
+      width: '100%',
+      height: '100%',
+      display: 'flex',
+    };
+    const deviceStyle = {
+      width: '240px',
+    };
+    const mapStyle = {
+      height: '100%',
+      flexGrow: 1,
+    };
+
+    return (
+      <div style={containerStyle}>
+        <div style={deviceStyle}>
+          <ul>
+            {devices?.map((device) => (<li key={device.id}>{device.name}</li>))}
+            <li><a href="#" onClick={handleAddDevice}>Add device</a></li>
+          </ul>
+        </div>
+        <div style={mapStyle} ref={mapContainer}></div>
+      </div>
+    );
+  };
+
+  const App = () => {
+    const [server, setServer] = React.useState();
+    const [user, setUser] = React.useState();
+
+    React.useEffect(() => {
+      const fetchData = async () => {
+        const serverResponse = await fetch('/api/server');
+        if (serverResponse.ok) {
+          setServer(await serverResponse.json());
+        }
+        const sessionResponse = await fetch('/api/session');
+        if (sessionResponse.ok) {
+          setUser(await sessionResponse.json());
+        }
+      }
+      fetchData();
+    }, []);
+
+    return user ? (
+      <MainScreen />
+    ) : server ? (
+      <LoginScreen
+        server={server}
+        setServer={setServer}
+        setUser={setUser}
+      />
+    ) : '';
+  };
+
+  ReactDOM.render(<App />, document.getElementById('content'));
+
+</script>
 </body>
 </html>
-- 
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