125 lines
2.6 KiB
JavaScript
125 lines
2.6 KiB
JavaScript
import _ from 'lodash'
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import config from '../config.mjs'
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function limit(value, min, max, fallback) {
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let out = parseInt(value, 10)
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if (!out) {
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out = fallback
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}
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if (out < min) {
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out = min
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}
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if (out > max) {
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out = max
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}
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return out
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}
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export function parsePagination(ctx) {
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let out = {
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perPage: limit(ctx.query.perPage, 1, 1500, 1250),
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page: limit(ctx.query.page, 1, Number.MAX_SAFE_INTEGER, 1),
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}
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Object.keys(ctx.query).forEach(item => {
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if (item.startsWith('perPage.')) {
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let name = item.substring(8)
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out[name] = {
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perPage: limit(ctx.query[`perPage.${name}`], 1, 1500, 1250),
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page: limit(ctx.query[`page.${name}`], 1, Number.MAX_SAFE_INTEGER, 1),
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}
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}
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})
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return out
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}
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export function parseFilter(ctx) {
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let where
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let whereNot
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where = _.omitBy(ctx.query, test => test[0] === '!')
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whereNot = _.pickBy(ctx.query, test => test[0] === '!')
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whereNot = _.transform(
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whereNot,
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(result, value, key) => (result[key] = value.slice(1))
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)
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return {
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where: pick => _.pick(where, pick),
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whereNot: pick => _.pick(whereNot, pick),
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includes: (ctx.query.includes && ctx.query.includes.split(',')) || [],
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}
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}
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export function generateLinks(ctx, total) {
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let out = []
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let base = _(ctx.query)
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.omit(['page'])
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.transform((res, val, key) => res.push(`${key}=${val}`), [])
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.value()
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if (!ctx.query.perPage) {
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base.push(`perPage=${ctx.state.pagination.perPage}`)
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}
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// let protocol = ctx.protocol
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// if (config.get('frontend:url').startsWith('https')) {
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// protocol = 'https'
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// }
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let proto = 'http'
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if (config.get('frontend:url').startsWith('https')) {
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proto = 'https'
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}
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let first = new URL(ctx.path, proto + '://' + ctx.host).toString()
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first += `?${base.join('&')}`
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// Add the current page first
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out.push({
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rel: 'current',
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title: `Page ${ctx.query.page || 1}`,
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url: `${first}`,
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})
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// Then add any previous pages if we can
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if (ctx.state.pagination.page > 1) {
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out.push({
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rel: 'previous',
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title: 'Previous',
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url: `${first}&page=${ctx.state.pagination.page - 1}`,
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})
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out.push({
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rel: 'first',
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title: 'First',
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url: `${first}&page=1`,
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})
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}
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// Then add any next pages if we can
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if ((ctx.state.pagination.perPage * (ctx.state.pagination.page - 1)) + ctx.state.pagination.perPage < total) {
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out.push({
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rel: 'next',
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title: 'Next',
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url: `${first}&page=${ctx.state.pagination.page + 1}`,
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})
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out.push({
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rel: 'last',
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title: 'Last',
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url: `${first}&page=${Math.ceil(total / ctx.state.pagination.perPage)}`,
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})
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}
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return out
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}
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