atlas/web/_js/time.js
2022-04-27 14:13:25 -07:00

243 lines
26 KiB
JavaScript

/*
========================================================================
The 2022 /r/place Atlas
An Atlas of Reddit's 2022 /r/place, with information to each
artwork of the canvas provided by the community.
Copyright (c) 2017 Roland Rytz <roland@draemm.li>
Copyright (c) 2022 Place Atlas contributors
Licensed under the GNU Affero General Public License Version 3
https://place-atlas.stefanocoding.me/license.txt
========================================================================
*/
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optionEl.value = variation
optionEl.textContent = variationsConfig[variation].name
variantsEl.appendChild(optionEl)
}
const timelineSlider = document.getElementById("timeControlsSlider");
const tooltip = document.getElementById("timeControlsTooltip")
const image = document.getElementById("image");
let abortController = new AbortController()
let currentUpdateIndex = 0
let updateTimeout = setTimeout(null, 0)
let currentVariation = "default"
const defaultPeriod = variationsConfig[currentVariation].default
let currentPeriod = defaultPeriod
window.currentPeriod = currentPeriod
window.currentVariation = currentVariation
// SETUP
timelineSlider.max = variationsConfig[currentVariation].versions.length - 1;
timelineSlider.value = currentPeriod;
timelineSlider.addEventListener("input", (event) => {
updateTooltip(parseInt(event.target.value), currentVariation)
clearTimeout(updateTimeout)
updateTimeout = setTimeout(() => {
updateTime(parseInt(timelineSlider.value), currentVariation)
setTimeout(() => {
if (timelineSlider.value != currentPeriod && abortController.signal.aborted) {
updateTime(parseInt(timelineSlider.value), currentVariation)
}
}, 50)
}, 25)
})
variantsEl.addEventListener("input", (event) => {
updateTime(currentPeriod, event.target.value)
})
const dispatchTimeUpdateEvent = (period = timelineSlider.value, atlas = atlas) => {
const timeUpdateEvent = new CustomEvent('timeupdate', {
detail: {
period: period,
atlas: atlas
}
});
document.dispatchEvent(timeUpdateEvent);
}
async function updateBackground(newPeriod = currentPeriod, newVariation = currentVariation) {
abortController.abort()
abortController = new AbortController()
currentUpdateIndex++
const myUpdateIndex = currentUpdateIndex
currentPeriod = newPeriod
const variationConfig = variationsConfig[newVariation]
if (currentVariation !== newVariation) {
currentVariation = newVariation
timelineSlider.max = variationConfig.versions.length - 1;
currentPeriod = variationConfig.default;
newPeriod = currentPeriod
if (variationConfig.versions.length === 1) document.getElementById("bottomBar").classList.add('no-time-slider');
else document.getElementById("bottomBar").classList.remove('no-time-slider');
}
timelineSlider.value = currentPeriod
variantsEl.value = currentVariation
variantsEl.previousElementSibling.innerHTML = variationsConfig[newVariation].icon;
const configObject = variationConfig.versions[currentPeriod];
if (typeof configObject.url === "string") {
if (imageCache[configObject.url] === undefined) {
const fetchResult = await fetch(configObject.url, {
signal: abortController.signal
});
if (currentUpdateIndex !== myUpdateIndex) {
return [configObject, newPeriod, newVariation]
}
const imageBlob = await fetchResult.blob()
imageCache[configObject.url] = URL.createObjectURL(imageBlob)
}
image.src = imageCache[configObject.url]
} else {
const canvas = document.createElement('canvas')
const context = canvas.getContext('2d')
context.canvas.width = 2000
context.canvas.height = 2000
await Promise.all(configObject.url.map(async url => {
if (imageCache[url] === undefined) {
const fetchResult = await fetch(url, {
signal: abortController.signal
});
if (currentUpdateIndex !== myUpdateIndex) {
return
}
const imageBlob = await fetchResult.blob()
imageCache[url] = URL.createObjectURL(imageBlob)
}
}))
for await (const url of configObject.url) {
const imageLayer = new Image()
await new Promise(resolve => {
imageLayer.onload = () => {
context.drawImage(imageLayer, 0, 0)
resolve()
}
imageLayer.src = imageCache[url]
})
}
if (currentUpdateIndex !== myUpdateIndex) return [configObject, newPeriod, newVariation]
const blob = await new Promise(resolve => canvas.toBlob(resolve))
image.src = URL.createObjectURL(blob)
}
return [configObject, newPeriod, newVariation]
}
async function updateTime(newPeriod = currentPeriod, newVariation = currentVariation) {
document.body.dataset.canvasLoading = true
let configObject
[configObject, newPeriod, newVariation] = await updateBackground(newPeriod, newVariation)
atlas = []
for (const atlasIndex in atlasAll) {
let chosenIndex
const validPeriods2 = Object.keys(atlasAll[atlasIndex].path)
for (const i in validPeriods2) {
const validPeriods = validPeriods2[i].split(', ')
for (const j in validPeriods) {
const [start, end, variation] = parsePeriod(validPeriods[j])
if (isOnPeriod(start, end, variation, newPeriod, newVariation)) {
chosenIndex = i
break
}
}
if (chosenIndex !== undefined) break
}
if (chosenIndex === undefined) continue
const pathChosen = Object.values(atlasAll[atlasIndex].path)[chosenIndex]
const centerChosen = Object.values(atlasAll[atlasIndex].center)[chosenIndex]
if (pathChosen === undefined) continue
atlas.push({
...atlasAll[atlasIndex],
path: pathChosen,
center: centerChosen,
})
}
dispatchTimeUpdateEvent(newPeriod, atlas)
document.body.dataset.canvasLoading = false
}
function updateTooltip(newPeriod, newVariation) {
const configObject = variationsConfig[newVariation].versions[newPeriod]
// If timestap is a number return a UTC formatted date otherwise use exact timestap label
if (typeof configObject.timestamp === "number") tooltip.querySelector('div').textContent = new Date(configObject.timestamp * 1000).toUTCString()
else tooltip.querySelector('div').textContent = configObject.timestamp;
// Clamps position of tooltip to prevent from going off screen
const timelineSliderRect = timelineSlider.getBoundingClientRect();
let min = -timelineSliderRect.left+12;
let max = (window.innerWidth-tooltip.offsetWidth)-timelineSliderRect.left+4;
tooltip.style.left = Math.min(Math.max((timelineSlider.offsetWidth)*(timelineSlider.value)/(timelineSlider.max)-tooltip.offsetWidth/2, min), max) + "px";
}
tooltip.parentElement.addEventListener('mouseenter', () => updateTooltip(parseInt(timelineSlider.value), currentVariation))
window.addEventListener('resize', () => updateTooltip(parseInt(timelineSlider.value), currentVariation))
function isOnPeriod(start, end, variation, currentPeriod, currentVariation) {
return currentPeriod >= start && currentPeriod <= end && variation === currentVariation
}
function parsePeriod(periodString) {
let variation = "default"
periodString = periodString + ""
if (periodString.split(':').length > 1) {
const split = periodString.split(':')
variation = codeReference[split[0]]
periodString = split[1]
}
if (periodString.search('-') + 1) {
const [start, end] = periodString.split('-').map(i => parseInt(i))
return [start, end, variation]
} else {
const periodNew = parseInt(periodString)
return [periodNew, periodNew, variation]
}
}