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Tree: 8b2bb74986427753f3b1628bd266bcc7bd7693ea

Files: 8b2bb74986427753f3b1628bd266bcc7bd7693ea / index.html

6905 bytesRaw
1<!doctype html>
2<html>
3<head>
4<meta charset=utf-8>
5<title>ssb-activity</title>
6<script src=common.js></script>
7</head>
8<body>
9
10<div style="text-align:center">
11  <h2>Daily active users</h2>
12  <img id=graph src=day.png alt="Graph of daily active feeds">
13</div>
14
15<div id="day-info" style="float:right; text-align:right; visibility:hidden">
16  <div><ins id="day"> </ins></div>
17  <div><ins id="day-users"> </ins> users</div>
18</div>
19
20<div id="user-info" style="visibility:hidden">
21  <div>User: <a id="user-link"><code id="user-id"> </code></a></div>
22  <div>Days active: <ins id="days-active"> </ins></div>
23  <div><ins id="first"> </ins> - <ins id="last"> </ins></div>
24</div>
25
26<script>
27var feedBase = 'https://viewer.scuttlebot.io/'
28var ids, idColors, idsByColor = {}
29var img = document.getElementById('graph')
30var imgData, origImgData
31var width, height
32var userInfo = document.getElementById('user-info')
33var userLink = document.getElementById('user-link')
34var userIdText = document.getElementById('user-id').firstChild
35var dayInfo = document.getElementById('day-info')
36var dayText = document.getElementById('day').firstChild
37var dayUsersText = document.getElementById('day-users').firstChild
38var daysActiveText = document.getElementById('days-active').firstChild
39var firstText = document.getElementById('first').firstChild
40var lastText = document.getElementById('last').firstChild
41
42var colors = {
43  yellow: [255, 255, 0, 255],
44  red: [255, 0, 0, 255],
45  black: [0, 0, 0, 255],
46  grey: [200, 200, 200, 255],
47  bg: [255, 255, 255, 0],
48  highlight: [0, 0, 0, 255]
49}
50
51function getJSON(url, cb) {
52  var req = new XMLHttpRequest()
53  req.open('GET', url, true)
54  req.onload = function () {
55    if (req.readyState !== 4) return
56    if (req.status >= 200 && req.status < 400)
57      cb(null, JSON.parse(req.responseText))
58    else
59      return cb(req)
60  }
61  req.onerror = cb
62  req.send(null)
63}
64
65function printError(err) {
66  var pre = document.createElement('pre')
67  document.body.appendChild(pre)
68  pre.appendChild(document.createTextNode(err.stack))
69}
70
71getJSON('ids-colors.json', function (err, info) {
72  if (err) return printError(err)
73  ids = info.ids
74  idColors = info.colors
75  for (var i = 0; i < ids.length; i++) {
76    var id = ids[i]
77    var color = idColors[id]
78    idsByColor[color] = id
79  }
80})
81
82var canvas = document.createElement('canvas')
83var ctx
84function onImageLoad() {
85  width = canvas.width = img.width
86  height = canvas.height = img.height
87  ctx = canvas.getContext('2d')
88  ctx.drawImage(img, 0, 0)
89  imgData = ctx.getImageData(0, 0, width, height)
90  origImgData = ctx.getImageData(0, 0, width, height)
91  img.parentNode.insertBefore(canvas, img)
92  img.parentNode.removeChild(img)
93  canvas.style.maxWidth = '100%'
94}
95if (img.complete) onImageLoad()
96else img.onload = onImageLoad
97
98function getPoint(e) {
99  return [
100    Math.floor(e.offsetX * width / canvas.offsetWidth),
101    Math.floor(e.offsetY * height / canvas.offsetHeight)
102  ]
103}
104
105function colorEquals(a, b) {
106  return a && b
107    && a[3] === b[3]
108    && (a[3] === 0 || (
109         a[0] === b[0]
110      && a[1] === b[1]
111      && a[2] === b[2]
112    ))
113}
114
115function getPixel(x, y) {
116  var i = (y * width + x) << 2
117  var data = origImgData.data
118  return [
119    data[i],
120    data[i+1],
121    data[i+2],
122    data[i+3]
123  ]
124}
125
126function setPixel(x, y, color) {
127  var i = (y * width + x) << 2
128  var data = imgData.data
129  data[i] = color[0]
130  data[i+1] = color[1]
131  data[i+2] = color[2]
132  data[i+3] = 255
133}
134
135function replaceColor(oldColor, newColor) {
136  for (var x = 0; x < width; x++) {
137    for (var y = height-1; y > 0; y--) {
138      var c = getPixel(x, y)
139      if (colorEquals(c, colors.bg)) break
140      if (colorEquals(c, oldColor)) {
141        setPixel(x, y, newColor)
142        break
143      }
144    }
145  }
146}
147
148function highlightColumn(x, amount) {
149  for (var y = 0; y < height; y++) {
150    var p = getPixel(x, y)
151    if (p[3] === 0) p[0] = p[1] = p[2] = 255
152    setPixel(x, y, common.interpolate(p, colors.grey, amount))
153  }
154}
155
156function pointEquals(a, b) {
157  return a ? b && a[0] === b[0] && a[1] === b[1] : !b
158}
159
160function dayStr(day) {
161  return isNaN(day) ? '' :
162    new Date(common.startTime + day * 86400000).toDateString()
163}
164
165var usersAtInterval = {}
166function countUsersAtInterval(x) {
167  var count = usersAtInterval[x]
168  if (typeof count !== 'undefined') return count
169  count = 0
170  for (var y = height-1; y > 0; y--) {
171    var color = getPixel(x, y)
172    if (colorEquals(color, colors.bg)) break
173    count++
174  }
175  return usersAtInterval[x] = count
176}
177
178var extents = {}
179function getUserExtent(id) {
180  var extent = extents[id]
181  if (extent) return extent
182  extent = extents[id] = {
183    days: 0
184  }
185  var color = idColors[id]
186  if (color) {
187    for (var x = 0; x < width; x++) {
188      for (var y = height-1; y > 0; y--) {
189        var c = getPixel(x, y)
190        if (colorEquals(c, colors.bg)) break
191        if (colorEquals(c, color)) {
192          extent.days++
193          if (!extent.first) extent.first = x
194          extent.last = x
195          break
196        }
197      }
198    }
199  }
200  return extent
201}
202
203var hoverColor, hoverPoint
204var clickedColor, clickedPoint
205
206function highlight(point) {
207  if (pointEquals(point, hoverPoint)) return
208  if (hoverPoint) highlightColumn(hoverPoint[0], 0)
209  if (point) highlightColumn(point[0], 0.7)
210  hoverPoint = point
211
212  var color = point && getPixel(point[0], point[1])
213  if (colorEquals(color, colors.bg)) {
214    if (hoverColor) replaceColor(hoverColor, hoverColor)
215    hoverColor = null
216    userInfo.style.visibility = 'hidden'
217    dayInfo.style.visibility = 'hidden'
218  } else if (!colorEquals(color, hoverColor)) {
219    if (hoverColor) replaceColor(hoverColor, hoverColor)
220    replaceColor(color, colors.highlight)
221    hoverColor = color
222  }
223
224  if (!point) {
225    dayInfo.style.visibility = 'hidden'
226  } else {
227    dayInfo.style.visibility = 'visible'
228    dayText.nodeValue = dayStr(point[0])
229    dayUsersText.nodeValue = countUsersAtInterval(point[0])
230  }
231
232  var id = idsByColor[color]
233  if (!id) {
234    userInfo.style.visibility = 'hidden'
235  } else {
236    userIdText.nodeValue = id
237    userLink.href = feedBase + encodeURIComponent(id)
238    var extent = getUserExtent(id)
239    daysActiveText.nodeValue = extent.days
240    firstText.nodeValue = dayStr(extent.first)
241    lastText.nodeValue = dayStr(extent.last)
242    userInfo.style.visibility = 'visible'
243  }
244
245  ctx.putImageData(imgData, 0, 0)
246}
247
248canvas.addEventListener('mousemove', function (e) {
249  highlight(getPoint(e))
250}, false)
251
252canvas.addEventListener('mousedown', function (e) {
253  var point = getPoint(e)
254  if (pointEquals(point, clickedPoint)) return
255  var color
256  if (point) {
257    color = getPixel(point[0], point[1])
258    if (colorEquals(color, colors.bg)) {
259      color = null
260      point = null
261    }
262  }
263  clickedPoint = point
264  clickedColor = color
265  highlight(point)
266}, false)
267
268canvas.addEventListener('mouseout', function (e) {
269  highlight(clickedPoint)
270}, false)
271
272</script>
273</body>
274</html>
275

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