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<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>MapRoulette Preview</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
tr:nth-child(odd) {
background-color: #eee
}
tr:nth-child(even) {
background-color: #ddd;
}
.modify {
background-color: orange;
}
.add {
background-color: lightgreen;
}
.remove {
background-color: red;
}
.row {
margin: 10px;
border-width: 1px;
border-color: black;
border-style: solid;
}
</style>
</head>
<body>
<div id="content"></div>
<script>
const q = new URLSearchParams(window.location.search)
let tagAddCount = 0
let tagModifyCount = 0
let tagRemoveCount = 0
fetch(q.get('changes') || 'changes.json')
.then(res => res.json())
.then(changes => {
renderChanges(changes)
})
function renderChanges(changes) {
const content = document.getElementById('content')
const headerText = document.createElement('p')
content.appendChild(headerText)
for (const [id, change] of Object.entries(changes)) {
const header = document.createElement('h2')
header.textContent = id
content.appendChild(header)
const table = document.createElement('table')
// table header
const headerRow = document.createElement('tr')
const headerTag = document.createElement('th')
headerTag.textContent = 'Tag'
headerRow.appendChild(headerTag)
const headerBefore = document.createElement('th')
headerBefore.textContent = 'Before'
headerRow.appendChild(headerBefore)
const headerAfter = document.createElement('th')
headerAfter.textContent = 'After'
headerRow.appendChild(headerAfter)
table.appendChild(headerRow)
let tagsModified = false
let tagsAdded = false
let tagsRemoved = false
// properties
const distinctKeys = [...new Set([...Object.keys(change.before.properties), ...Object.keys(change.after.properties)])]
for (const key of distinctKeys) {
const tr = document.createElement('tr')
const tdKey = document.createElement('td')
tdKey.textContent = key
const tdBefore = document.createElement('td')
const beforeValue = change.before.properties[key]
tdBefore.textContent = beforeValue
const tdAfter = document.createElement('td')
const afterValue = change.after.properties[key]
tdAfter.textContent = afterValue
if (beforeValue && afterValue && beforeValue !== afterValue) {
tdBefore.classList.add('modify')
tdAfter.classList.add('modify')
tagsModified = true
tagModifyCount++
}
if (!beforeValue && afterValue) {
tdAfter.classList.add('add')
tagsAdded = true
tagAddCount++
}
if (beforeValue && !afterValue) {
tdAfter.classList.add('remove')
tagsRemoved = true
tagRemoveCount++
}
tr.appendChild(tdKey)
tr.appendChild(tdBefore)
tr.appendChild(tdAfter)
table.appendChild(tr)
}
header.textContent = `${id} ${tagsAdded ? 'Added' : ''} ${tagsModified ? 'Modified' : ''} ${tagsRemoved ? 'Removed' : ''}`
content.appendChild(table)
}
headerText.textContent = `${Object.keys(changes).length} features with changes. ${tagAddCount} new tags, ${tagRemoveCount} removed tags, ${tagModifyCount} changed tags.`
}
</script>
</body>
</html>
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