popup.js

   1 // Written by Mike Frysinger <vapier@gmail.com>.  Released into the public domain.
   2
   3 var url_base, user, pass;
   4
   5 function fetchpage(url, callback) {
   6         url = url_base + '/' + url;
   7
   8         var xhr = new XMLHttpRequest();
   9         xhr.setstatus = false;
  10         try {
  11                 xhr.onreadystatechange = function(state) {
  12                         if (xhr.readyState == 4) {
  13                                 if (xhr.status == 200) {
  14                                         callback(xhr, state);
  15                                 } else {
  16                                         xhr.setstatus = true;
  17                                         setstatus(
  18                                                 'Could not connect;<br>check your ' +
  19                                                 '<a id="open-settings" href="">settings</a>'
  20                                         );
  21                                         document.getElementById('open-settings').onclick = open_settings_page;
  22                                         console.log('connect error', state);
  23                                 }
  24                         }
  25                 }
  26                 xhr.onerror = function(error) {
  27                         if (!xhr.setstatus)
  28                                 setstatus('onerror; see console');
  29                         console.log('xhr error:', error);
  30                 }
  31
  32                 console.log('fetching', url)
  33                 xhr.withCredentials = true;
  34                 xhr.open('GET', url, true, user, pass);
  35                 xhr.responseType = 'document';
  36                 // The user/pass options above don't seem to work, so do it ourselves.
  37                 xhr.setRequestHeader('Authorization', 'Basic ' + btoa(user + ':' + pass));
  38                 xhr.send();
  39         } catch(e) {
  40                 setstatus('Exception; see console');
  41                 console.log('exception:', e);
  42         }
  43 }
  44
  45 function onoff(o) {
  46         const data = o.toUpperCase();
  47         switch (data) {
  48         case 'OFF':
  49                 return 'ON';
  50         case 'ON':
  51                 return 'OFF';
  52         default:
  53                 // For example, cycle uses CCL.
  54                 return data;
  55         }
  56 }
  57
  58 function toggleit(button) {
  59         const outlet_num = button.id.split(':')[0];
  60         var old_status = button.data;
  61         var new_status = onoff(button.data);
  62         var url = 'outlet?' + outlet_num + '=' + new_status;
  63
  64         if (!button.id.endsWith('cycle')) {
  65                 const cycler = document.getElementById(`${button.id}:cycle`);
  66                 cycler.style.display = new_status === 'ON' ? 'block' : 'none';
  67         }
  68
  69         fetchpage(url, function(xhr, state) {
  70                 console.log('switch ' + outlet_num + ': ' + old_status + ' -> ' + new_status);
  71                 if (!button.id.endsWith('cycle')) {
  72                         button.value = 'Switch ' + old_status;
  73                         button.data = new_status;
  74                 }
  75         });
  76 }
  77 function toggle() {
  78         toggleit(this);
  79 }
  80
  81 function toggle_confirmed() {
  82         clearTimeout(this.timeout);
  83         this.onclick = toggle_confirm;
  84         toggleit(this);
  85 }
  86
  87 function toggle_confirm() {
  88         var button = this;
  89         this.onclick = toggle_confirmed;
  90         this.oldvalue = this.value;
  91         this.value = 'Confirm!?';
  92         this.timeout = setTimeout(function() {
  93                 button.value = button.oldvalue;
  94                 button.onclick = toggle_confirm;
  95         }, 5000);
  96 }
  97
  98 function trim(str) {
  99         return str.replace(/^\s+|\s+$/, '');
 100 }
 101
 102 function initpopup(xhr, state) {
 103         var tbl = document.getElementById('buttons');
 104         var row, cell, button;
 105
 106         console.log(xhr, state);
 107
 108         // There is no clean API for extracting the current state.
 109         // Example result:
 110         /*
 111                 <tr>
 112                 <th bgcolor="#DDDDFF" align=left>
 113                 Controller: !!!Web Power Switch 6
 114                 </th>
 115                 </tr>
 116         */
 117
 118         var th, ths = state.currentTarget.responseXML.querySelectorAll('th');
 119         for (var i = 0; th = ths[i]; ++i) {
 120                 if (th.bgColor != '#DDDDFF')
 121                         continue;
 122
 123                 var controller_name = trim(th.innerText);
 124                 if (controller_name.slice(0, 12) != 'Controller: ')
 125                         continue;
 126
 127                 row = tbl.insertRow(-1);
 128                 cell = row.insertCell(-1);
 129                 cell.colSpan = 10;
 130                 cell.align = 'center';
 131                 cell.innerText = controller_name.slice(12);
 132                 cell.innerHTML = '<a href="' + url_base + '" target="_blank">' + cell.innerHTML + '</a>'
 133         }
 134
 135         var tr, trs = state.currentTarget.responseXML.querySelectorAll('tr');
 136         for (var i = 0; tr = trs[i]; ++i) {
 137                 if (tr.bgColor != '#F4F4F4')
 138                         continue;
 139
 140                 var outlet_num     = trim(tr.children[0].innerText);
 141                 var outlet_name    = trim(tr.children[1].innerText);
 142                 var current_status = trim(tr.children[2].innerText);
 143                 var new_status     = trim(tr.children[3].innerText);
 144                 var confirmable    = tr.children[3].children[0].hasAttribute('onclick');
 145
 146                 row = tbl.insertRow(-1);
 147                 cell = row.insertCell(-1);
 148                 if (outlet_name === '')
 149                         cell.innerHTML = '<i>unnamed</i>';
 150                 else
 151                         cell.innerText = outlet_name + ':';
 152                 cell = row.insertCell(-1);
 153                 button = document.createElement('input');
 154                 button.type = 'button';
 155                 button.id = outlet_num;
 156                 button.value = new_status;
 157                 button.data = current_status;
 158                 button.onclick = confirmable ? toggle_confirm : toggle;
 159                 cell.appendChild(button);
 160
 161                 // The switch only allows cycling when it's on.
 162                 cell = row.insertCell(-1);
 163                 button = document.createElement('input');
 164                 button.type = 'button';
 165                 button.id = `${outlet_num}:cycle`;
 166                 button.value = '🗘';
 167                 button.data = 'CCL';
 168                 button.title = 'Power cycle';
 169                 button.onclick = confirmable ? toggle_confirm : toggle;
 170                 if (current_status.toUpperCase() === 'OFF') {
 171                         button.style.display = 'none';
 172                 }
 173                 button.style.fontSize = 'smaller';
 174                 cell.appendChild(button);
 175         }
 176
 177         setstatus();
 178 }
 179
 180 function setstatus(msg) {
 181         var status = document.getElementById('status');
 182         status.innerHTML = msg;
 183         status.style.visibility = msg ? '' : 'hidden';
 184         status.style.float      = msg ? '' : 'left';
 185         status.style.position   = msg ? '' : 'absolute';
 186 }
 187
 188 function open_settings_page() {
 189         chrome.runtime.openOptionsPage();
 190 }
 191
 192 document.addEventListener('DOMContentLoaded', function() {
 193         storage.get(settings_keys, function(settings) {
 194                 url_base = settings['url'] || settings_defaults['url'];
 195                 user = settings['user'] || settings_defaults['user'];
 196                 pass = settings['pass'] || settings_defaults['pass'];
 197                 chrome.permissions.contains({
 198                         origins: [url_base + '/*']
 199                 }, function(granted) {
 200                         if (granted) {
 201                                 fetchpage('index.htm', initpopup);
 202                         } else {
 203                                 setstatus(
 204                                         'Missing permissions;<br>please visit the ' +
 205                                         '<a id="open-settings" href="">settings page</a>' +
 206                                         '<br>to grant access.<br>' +
 207                                         '<center><input id=retry type=submit value=Retry></center>'
 208                                 );
 209                                 document.getElementById('open-settings').onclick = open_settings_page;
 210                                 // Work around http://crbug.com/125706.
 211                                 document.getElementById('retry').onclick = function() {
 212                                         chrome.permissions.request({origins: [url_base + '/*']});
 213                                         fetchpage('index.htm', initpopup);
 214                                 };
 215                         }
 216                 });
 217         });
 218 });