109 lines
2.9 KiB
JavaScript
109 lines
2.9 KiB
JavaScript
const storageType = 'localStorage'
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let data = {}
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const statusEl = document.getElementById('status')
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const formEl = document.getElementById('search')
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const errors = {
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missingQuery: new TypeError('Query is missing.'),
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noFoundInstances: new Error('No instances were found.'),
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}
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function buildSearchURL (opts = {}) {
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if (typeof opts.query !== 'string') throw errors.missingQuery
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if (!('instances' in data)) throw errors.noFoundInstances
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if (data.instances.length === 0) throw errors.noFoundInstances
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// Random instance
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const n = Math.floor(Math.random() * data.instances.length)
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const instanceURL = data.instances[n]
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// Build URL
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const params = new URLSearchParams({
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q: opts.query
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})
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if (opts.category && opts.category !== 'all') {
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params.append(`category_${opts.category}`, '')
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}
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const url = `${instanceURL}?${params.toString()}`
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return url
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}
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// Register event listeners
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formEl.addEventListener('submit', (event) => {
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event.preventDefault()
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location.assign(buildSearchURL({
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query: formEl.query.value,
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category: formEl.category.value
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}))
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})
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function locallyGetInstances () {
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if (!(storageType in window)) return []
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const item = window[storageType].getItem('instances')
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try {
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return JSON.parse(item)
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} catch (_err) {
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return []
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}
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}
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function locallySetInstances () {
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if (!(storageType in window)) return
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if (!('instances' in data)) return
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if (data.instances.length === 0) return
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window[storageType].setItem(
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'instances',
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JSON.stringify(data.instances)
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)
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}
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async function remotelyGetInstances () {
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const instances = await fetch('https://searx.space/data/instances.json')
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.then((req) => req.json())
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.then((json) => Object.entries(json.instances))
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.then((entries) => entries.filter(([_url, details]) => {
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if (details.network_type !== 'normal') return
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if (details.uptime == null) return
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if (details.uptime.uptimeDay !== 100) return
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return true
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}))
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.then((entries) => entries.map(([url]) => url))
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.catch((err) => {
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console.error(err)
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return []
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})
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window[storageType].setItem('timestamp', Date.now().toString())
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return instances
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}
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// Get local instances
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data.instances = locallyGetInstances()
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// Fetch remote instances if necessary
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const timestamp = +window[storageType].getItem('timestamp')
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if (Date.now() > timestamp + 3_600_000 /* 1 hour */) {
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const remoteInstances = await remotelyGetInstances()
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if (remoteInstances.length > 0) {
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data.instances = remoteInstances
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locallySetInstances()
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}
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}
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// Auto-redirect in presence of search parameters
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if (location.search.length > 0) {
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const searchParams = new URLSearchParams(location.search.slice(1))
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if (searchParams.has('q')) {
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location.assign(buildSearchURL({
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query: searchParams.get('q'),
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category: searchParams.get('in') ?? 'all'
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}))
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}
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}
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statusEl.textContent = `${data.instances.length} instances`
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if (data.instances.length === 0) {
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statusEl.classList.add('error')
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}
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