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index.js
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// ===--- index.js - Swift Evolution --------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
// ===---------------------------------------------------------------------===//
'use strict'
/** Holds the primary data used on this page: metadata about Swift Evolution proposals. */
var proposals
/**
* To be updated when proposals are confirmed to have been implemented
* in a new language version.
*/
var languageVersions = ['2.2', '3', '3.0.1', '3.1', '4', '4.1', '4.2', '5', '5.1', '5.2', '5.3']
/** Storage for the user's current selection of filters when filtering is toggled off. */
var filterSelection = []
var GITHUB_BASE_URL = 'https://github.com/'
var REPO_PROPOSALS_BASE_URL = GITHUB_BASE_URL + 'apple/swift-evolution/blob/master/proposals'
/**
* `name`: Mapping of the states in the proposals JSON to human-readable names.
*
* `shortName`: Mapping of the states in the proposals JSON to short human-readable names.
* Used for the left-hand column of proposal statuses.
*
* `className`: Mapping of states in the proposals JSON to the CSS class names used
* to manipulate and display proposals based on their status.
*
* `count`: Number of proposals that determine after all proposals is loaded
*/
var states = {
'.awaitingReview': {
name: 'Awaiting Review',
shortName: 'Awaiting Review',
className: 'awaiting-review',
count: 0
},
'.scheduledForReview': {
name: 'Scheduled for Review',
shortName: 'Scheduled',
className: 'scheduled-for-review',
count: 0
},
'.activeReview': {
name: 'Active Review',
shortName: 'Active Review',
className: 'active-review',
count: 0
},
'.returnedForRevision': {
name: 'Returned for Revision',
shortName: 'Returned',
className: 'returned-for-revision',
count: 0
},
'.withdrawn': {
name: 'Withdrawn',
shortName: 'Withdrawn',
className: 'withdrawn',
count: 0
},
'.deferred': {
name: 'Deferred',
shortName: 'Deferred',
className: 'deferred',
count: 0
},
'.accepted': {
name: 'Accepted',
shortName: 'Accepted',
className: 'accepted',
count: 0
},
'.acceptedWithRevisions': {
name: 'Accepted with revisions',
shortName: 'Accepted',
className: 'accepted-with-revisions',
count: 0
},
'.rejected': {
name: 'Rejected',
shortName: 'Rejected',
className: 'rejected',
count: 0
},
'.implemented': {
name: 'Implemented',
shortName: 'Implemented',
className: 'implemented',
count: 0
},
'.error': {
name: 'Error',
shortName: 'Error',
className: 'error',
count: 0
}
}
init()
/** Primary entry point. */
function init () {
var req = new window.XMLHttpRequest()
req.addEventListener('load', function (e) {
proposals = JSON.parse(req.responseText)
// don't display malformed proposals
proposals = proposals.filter(function (proposal) {
return !proposal.errors
})
// descending numeric sort based the numeric nnnn in a proposal ID's SE-nnnn
proposals.sort(function compareProposalIDs (p1, p2) {
return parseInt(p1.id.match(/\d\d\d\d/)[0]) - parseInt(p2.id.match(/\d\d\d\d/)[0])
})
proposals = proposals.reverse()
render()
addEventListeners()
// apply filters when the page loads with a search already filled out.
// typically this happens after navigating backwards in a tab's history.
if (document.querySelector('#search-filter').value.trim()) {
filterProposals()
}
// apply selections from the current page's URI fragment
_applyFragment(document.location.hash)
})
req.addEventListener('error', function (e) {
document.querySelector('#proposals-count-number').innerText = 'Proposal data failed to load.'
})
document.querySelector('#proposals-count-number').innerHTML = 'Loading ...'
req.open('get', 'https://data.swift.org/swift-evolution/proposals')
req.send()
}
/**
* Creates an Element. Convenience wrapper for `document.createElement`.
*
* @param {string} elementType - The tag name. 'div', 'span', etc.
* @param {string[]} attributes - A list of attributes. Use `className` for `class`.
* @param {(string | Element)[]} children - A list of either text or other Elements to be nested under this Element.
* @returns {Element} The new node.
*/
function html (elementType, attributes, children) {
var element = document.createElement(elementType)
if (attributes) {
Object.keys(attributes).forEach(function (attributeName) {
var value = attributes[attributeName]
if (attributeName === 'className') attributeName = 'class'
element.setAttribute(attributeName, value)
})
}
if (!children) return element
if (!Array.isArray(children)) children = [children]
children.forEach(function (child) {
if (!child) {
console.warn('Null child ignored during creation of ' + elementType)
return
}
if (Object.getPrototypeOf(child) === String.prototype) {
child = document.createTextNode(child)
}
element.appendChild(child)
})
return element
}
function determineNumberOfProposals (proposals) {
// reset count
Object.keys(states).forEach(function (state){
states[state].count = 0
})
proposals.forEach(function (proposal) {
states[proposal.status.state].count += 1
})
// .acceptedWithRevisions proposals are combined in the filtering UI
// with .accepted proposals.
states['.accepted'].count += states['.acceptedWithRevisions'].count
}
/**
* Adds the dynamic portions of the page to the DOM, primarily the list
* of proposals and list of statuses used for filtering.
*
* These `render` functions are only called once when the page loads,
* the rest of the interactivity is based on toggling `display: none`.
*/
function render () {
renderNav()
renderBody()
}
/** Renders the top navigation bar. */
function renderNav () {
var nav = document.querySelector('nav')
// This list intentionally omits .acceptedWithRevisions and .error;
// .acceptedWithRevisions proposals are combined in the filtering UI
// with .accepted proposals.
var checkboxes = [
'.awaitingReview', '.scheduledForReview', '.activeReview', '.accepted',
'.implemented', '.returnedForRevision', '.deferred', '.rejected', '.withdrawn'
].map(function (state) {
var className = states[state].className
return html('li', null, [
html('input', { type: 'checkbox', className: 'filtered-by-status', id: 'filter-by-' + className, value: className }),
html('label', { className: className, tabindex: '0', role: 'button', 'for': 'filter-by-' + className, 'data-state-key': state }, [
addNumberToState(states[state].name, states[state].count)
])
])
})
var expandableArea = html('div', { className: 'filter-options expandable' }, [
html('h5', { id: 'filter-options-label' }, 'Status'),
html('ul', { id: 'filter-options', className: 'filter-by-status' })
])
nav.querySelector('.nav-contents').appendChild(expandableArea)
checkboxes.forEach(function (box) {
nav.querySelector('.filter-by-status').appendChild(box)
})
// The 'Implemented' filter selection gets an extra row of options if selected.
var implementedCheckboxIfPresent = checkboxes.filter(function (cb) {
return cb.querySelector(`#filter-by-${states['.implemented'].className}`)
})[0]
if (implementedCheckboxIfPresent) {
// add an extra row of options to filter by language version
var versionRowHeader = html('h5', { id: 'version-options-label', className: 'hidden' }, 'Language Version')
var versionRow = html('ul', { id: 'version-options', className: 'filter-by-status hidden' })
var versionOptions = languageVersions.map(function (version) {
return html('li', null, [
html('input', {
type: 'checkbox',
id: 'filter-by-swift-' + _idSafeName(version),
className: 'filter-by-swift-version',
value: 'swift-' + _idSafeName(version)
}),
html('label', {
tabindex: '0',
role: 'button',
'for': 'filter-by-swift-' + _idSafeName(version)
}, 'Swift ' + version)
])
})
versionOptions.forEach(function (version) {
versionRow.appendChild(version)
})
expandableArea.appendChild(versionRowHeader)
expandableArea.appendChild(versionRow)
}
return nav
}
/** Displays the main list of proposals that takes up the majority of the page. */
function renderBody () {
var article = document.querySelector('article')
var proposalAttachPoint = article.querySelector('.proposals-list')
var proposalPresentationOrder = [
'.awaitingReview', '.scheduledForReview', '.activeReview', '.accepted',
'.acceptedWithRevisions', '.implemented', '.returnedForRevision', '.deferred', '.rejected', '.withdrawn'
]
proposalPresentationOrder.map(function (state) {
var matchingProposals = proposals.filter(function (p) { return p.status && p.status.state === state })
matchingProposals.map(function (proposal) {
var proposalBody = html('section', { id: proposal.id, className: 'proposal ' + proposal.id }, [
html('div', { className: 'status-pill-container' }, [
html('span', { className: 'status-pill color-' + states[state].className }, [
states[proposal.status.state].shortName
])
]),
html('div', { className: 'proposal-content' }, [
html('div', { className: 'proposal-header' }, [
html('span', { className: 'proposal-id' }, [
proposal.id
]),
html('h4', { className: 'proposal-title' }, [
html('a', {
href: REPO_PROPOSALS_BASE_URL + '/' + proposal.link,
target: '_blank'
}, [
proposal.title
])
])
])
])
])
var detailNodes = []
detailNodes.push(renderAuthors(proposal.authors))
if (proposal.reviewManager.name) detailNodes.push(renderReviewManager(proposal.reviewManager))
if (proposal.trackingBugs) detailNodes.push(renderTrackingBugs(proposal.trackingBugs))
if (state === '.implemented') detailNodes.push(renderVersion(proposal.status.version))
if (proposal.implementation) detailNodes.push(renderImplementation(proposal.implementation))
if (state === '.acceptedWithRevisions') detailNodes.push(renderStatus(proposal.status))
if (state === '.activeReview' || state === '.scheduledForReview') {
detailNodes.push(renderStatus(proposal.status))
detailNodes.push(renderReviewPeriod(proposal.status))
}
if (state === '.returnedForRevision') {
detailNodes.push(renderStatus(proposal.status))
}
var details = html('div', { className: 'proposal-details' }, detailNodes)
proposalBody.querySelector('.proposal-content').appendChild(details)
proposalAttachPoint.appendChild(proposalBody)
})
})
// Update the "(n) proposals" text
updateProposalsCount(article.querySelectorAll('.proposal').length)
return article
}
/** Authors have a `name` and optional `link`. */
function renderAuthors (authors) {
var authorNodes = authors.map(function (author) {
if (author.link.length > 0) {
return html('a', { href: author.link, target: '_blank' }, author.name)
} else {
return document.createTextNode(author.name)
}
})
authorNodes = _joinNodes(authorNodes, ', ')
return html('div', { className: 'authors proposal-detail' }, [
html('div', { className: 'proposal-detail-label' },
authors.length > 1 ? 'Authors: ' : 'Author: '
),
html('div', { className: 'proposal-detail-value' }, authorNodes)
])
}
/** Review managers have a `name` and optional `link`. */
function renderReviewManager (reviewManager) {
return html('div', { className: 'review-manager proposal-detail' }, [
html('div', { className: 'proposal-detail-label' }, 'Review Manager: '),
html('div', { className: 'proposal-detail-value' }, [
reviewManager.link
? html('a', { href: reviewManager.link, target: '_blank' }, reviewManager.name)
: reviewManager.name
])
])
}
/** Tracking bugs linked in a proposal are updated via bugs.swift.org. */
function renderTrackingBugs (bugs) {
var bugNodes = bugs.map(function (bug) {
return html('a', { href: bug.link, target: '_blank' }, [
bug.id,
' (',
bug.assignee || 'Unassigned',
', ',
bug.status,
')'
])
})
bugNodes = _joinNodes(bugNodes, ', ')
return html('div', { className: 'proposal-detail' }, [
html('div', { className: 'proposal-detail-label' }, [
bugs.length > 1 ? 'Bugs: ' : 'Bug: '
]),
html('div', { className: 'bug-list proposal-detail-value' },
bugNodes
)
])
}
/** Implementations are required alongside proposals (after Swift 4.0). */
function renderImplementation (implementations) {
var implNodes = implementations.map(function (impl) {
return html('a', {
href: GITHUB_BASE_URL + impl.account + '/' + impl.repository + '/' + impl.type + '/' + impl.id
}, [
impl.repository,
impl.type === 'pull' ? '#' : '@',
impl.id.substr(0, 7)
])
})
implNodes = _joinNodes(implNodes, ', ')
var label = 'Implementation: '
return html('div', { className: 'proposal-detail' }, [
html('div', { className: 'proposal-detail-label' }, [label]),
html('div', { className: 'implementation-list proposal-detail-value' },
implNodes
)
])
}
/** For `.implemented` proposals, display the version of Swift in which they first appeared. */
function renderVersion (version) {
return html('div', { className: 'proposal-detail' }, [
html('div', { className: 'proposal-detail-label' }, [
'Implemented In: '
]),
html('div', { className: 'proposal-detail-value' }, [
'Swift ' + version
])
])
}
/** For some proposal states like `.activeReview`, it helps to see the status in the same details list. */
function renderStatus (status) {
return html('div', { className: 'proposal-detail' }, [
html('div', { className: 'proposal-detail-label' }, [
'Status: '
]),
html('div', { className: 'proposal-detail-value' }, [
states[status.state].name
])
])
}
/**
* Review periods are ISO-8601-style 'YYYY-MM-DD' dates.
*/
function renderReviewPeriod (status) {
var months = ['January', 'February', 'March', 'April', 'May', 'June', 'July',
'August', 'September', 'October', 'November', 'December'
]
var start = new Date(status.start)
var end = new Date(status.end)
var startMonth = start.getUTCMonth()
var endMonth = end.getUTCMonth()
var detailNodes = [months[startMonth], ' ']
if (startMonth === endMonth) {
detailNodes.push(
start.getUTCDate().toString(),
'–',
end.getUTCDate().toString()
)
} else {
detailNodes.push(
start.getUTCDate().toString(),
' – ',
months[endMonth],
' ',
end.getUTCDate().toString()
)
}
return html('div', { className: 'proposal-detail' }, [
html('div', { className: 'proposal-detail-label' }, [
'Scheduled: '
]),
html('div', { className: 'proposal-detail-value' }, detailNodes)
])
}
/** Utility used by some of the `render*` functions to add comma text nodes between DOM nodes. */
function _joinNodes (nodeList, text) {
return nodeList.map(function (node) {
return [node, text]
}).reduce(function (result, pair, index, pairs) {
if (index === pairs.length - 1) pair.pop()
return result.concat(pair)
}, [])
}
/** Adds UI interactivity to the page. Primarily activates the filtering controls. */
function addEventListeners () {
var nav = document.querySelector('nav')
// typing in the search field causes the filter to be reapplied.
nav.addEventListener('keyup', filterProposals)
nav.addEventListener('change', filterProposals)
// clearing the search field also hides the X symbol
nav.querySelector('#clear-button').addEventListener('click', function () {
nav.querySelector('#search-filter').value = ''
nav.querySelector('#clear-button').classList.toggle('hidden')
filterProposals()
})
// each of the individual statuses needs to trigger filtering as well
;[].forEach.call(nav.querySelectorAll('.filter-by-status input'), function (element) {
element.addEventListener('change', filterProposals)
})
var expandableArea = document.querySelector('.filter-options')
var implementedToggle = document.querySelector('#filter-by-implemented')
implementedToggle.addEventListener('change', function () {
// hide or show the row of version options depending on the status of the 'Implemented' option
;['#version-options', '#version-options-label'].forEach(function (selector) {
expandableArea.querySelector(selector).classList.toggle('hidden')
})
// don't persist any version selections when the row is hidden
;[].concat.apply([], expandableArea.querySelectorAll('.filter-by-swift-version')).forEach(function (versionCheckbox) {
versionCheckbox.checked = false
})
})
document.querySelector('.filter-button').addEventListener('click', toggleFiltering)
var filterToggle = document.querySelector('.filter-toggle')
filterToggle.querySelector('.toggle-filter-panel').addEventListener('click', toggleFilterPanel)
// Behavior conditional on certain browser features
var CSS = window.CSS
if (CSS) {
// emulate position: sticky when it isn't available.
if (!(CSS.supports('position', 'sticky') || CSS.supports('position', '-webkit-sticky'))) {
window.addEventListener('scroll', function () {
var breakpoint = document.querySelector('header').getBoundingClientRect().bottom
var nav = document.querySelector('nav')
var position = window.getComputedStyle(nav).position
var shadowNav // maintain the main content height when the main 'nav' is removed from the flow
// this is measuring whether or not the header has scrolled offscreen
if (breakpoint <= 0) {
if (position !== 'fixed') {
shadowNav = nav.cloneNode(true)
shadowNav.classList.add('clone')
shadowNav.style.visibility = 'hidden'
nav.parentNode.insertBefore(shadowNav, document.querySelector('main'))
nav.style.position = 'fixed'
}
} else if (position === 'fixed') {
nav.style.position = 'static'
shadowNav = document.querySelector('nav.clone')
if (shadowNav) shadowNav.parentNode.removeChild(shadowNav)
}
})
}
}
// on smaller screens, hide the filter panel when scrolling
if (window.matchMedia('(max-width: 414px)').matches) {
window.addEventListener('scroll', function () {
var breakpoint = document.querySelector('header').getBoundingClientRect().bottom
if (breakpoint <= 0 && document.querySelector('.expandable').classList.contains('expanded')) {
toggleFilterPanel()
}
})
}
}
/**
* Toggles whether filters are active. Rather than being cleared, they are saved to be restored later.
* Additionally, toggles the presence of the "Filtered by:" status indicator.
*/
function toggleFiltering () {
var filterDescription = document.querySelector('.filter-toggle')
var shouldPreserveSelection = !filterDescription.classList.contains('hidden')
filterDescription.classList.toggle('hidden')
var selected = document.querySelectorAll('.filter-by-status input[type=checkbox]:checked')
var filterButton = document.querySelector('.filter-button')
if (shouldPreserveSelection) {
filterSelection = [].map.call(selected, function (checkbox) { return checkbox.id })
;[].forEach.call(selected, function (checkbox) { checkbox.checked = false })
filterButton.setAttribute('aria-pressed', 'false')
} else { // restore it
filterSelection.forEach(function (id) {
var checkbox = document.getElementById(id)
checkbox.checked = true
})
filterButton.setAttribute('aria-pressed', 'true')
}
document.querySelector('.expandable').classList.remove('expanded')
filterButton.classList.toggle('active')
filterProposals()
}
/**
* Expands or constracts the filter panel, which contains buttons that
* let users filter proposals based on their current stage in the
* Swift Evolution process.
*/
function toggleFilterPanel () {
var panel = document.querySelector('.expandable')
var button = document.querySelector('.toggle-filter-panel')
panel.classList.toggle('expanded')
if (panel.classList.contains('expanded')) {
button.setAttribute('aria-pressed', 'true')
} else {
button.setAttribute('aria-pressed', 'false')
}
}
/**
* Applies both the status-based and text-input based filters to the proposals list.
*/
function filterProposals () {
var filterElement = document.querySelector('#search-filter')
var filter = filterElement.value
var clearButton = document.querySelector('#clear-button')
if (filter.length === 0) {
clearButton.classList.add('hidden')
} else {
clearButton.classList.remove('hidden')
}
var matchingSets = [proposals.concat()]
// Comma-separated lists of proposal IDs are treated as an "or" search.
if (filter.match(/(SE-\d\d\d\d)($|((,SE-\d\d\d\d)+))/i)) {
var proposalIDs = filter.split(',').map(function (id) {
return id.toUpperCase()
})
matchingSets[0] = matchingSets[0].filter(function (proposal) {
return proposalIDs.indexOf(proposal.id) !== -1
})
} else if (filter.trim().length !== 0) {
// The search input treats words as order-independent.
matchingSets = filter.split(/\s/)
.filter(function (s) { return s.length > 0 })
.map(function (part) { return _searchProposals(part) })
}
var intersection = matchingSets.reduce(function (intersection, candidates) {
return intersection.filter(function (alreadyIncluded) { return candidates.indexOf(alreadyIncluded) !== -1 })
}, matchingSets[0] || [])
_applyFilter(intersection)
_updateURIFragment()
determineNumberOfProposals(intersection)
updateFilterStatus()
}
/**
* Utility used by `filterProposals`.
*
* Picks out various fields in a proposal which users may want to key
* off of in their text-based filtering.
*
* @param {string} filterText - A raw word of text as entered by the user.
* @returns {Proposal[]} The proposals that match the entered text, taken from the global list.
*/
function _searchProposals (filterText) {
var filterExpression = filterText.toLowerCase()
var searchableProperties = [
['id'],
['title'],
['reviewManager', 'name'],
['status', 'state'],
['status', 'version'],
['authors', 'name'],
['authors', 'link'],
['implementation', 'account'],
['implementation', 'repository'],
['implementation', 'id'],
['trackingBugs', 'link'],
['trackingBugs', 'status'],
['trackingBugs', 'id'],
['trackingBugs', 'assignee']
]
// reflect over the proposals and find ones with matching properties
var matchingProposals = proposals.filter(function (proposal) {
var match = false
searchableProperties.forEach(function (propertyList) {
var value = proposal
propertyList.forEach(function (propertyName, index) {
if (!value) return
value = value[propertyName]
if (index < propertyList.length - 1) {
// For arrays, apply the property check to each child element.
// Note that this only looks to a depth of one property.
if (Array.isArray(value)) {
var matchCondition = value.some(function (element) {
return element[propertyList[index + 1]] && element[propertyList[index + 1]].toString().toLowerCase().indexOf(filterExpression) >= 0
})
if (matchCondition) {
match = true
}
} else {
return
}
} else if (value && value.toString().toLowerCase().indexOf(filterExpression) >= 0) {
match = true
}
})
})
return match
})
return matchingProposals
}
/**
* Helper for `filterProposals` that actually makes the filter take effect.
*
* @param {Proposal[]} matchingProposals - The proposals that have passed the text filtering phase.
* @returns {Void} Toggles `display: hidden` to apply the filter.
*/
function _applyFilter (matchingProposals) {
// filter out proposals based on the grouping checkboxes
var allStateCheckboxes = document.querySelector('nav').querySelectorAll('.filter-by-status input:checked')
var selectedStates = [].map.call(allStateCheckboxes, function (checkbox) { return checkbox.value })
var selectedStateNames = [].map.call(allStateCheckboxes, function (checkbox) { return checkbox.nextElementSibling.innerText.trim() })
updateFilterDescription(selectedStateNames)
if (selectedStates.length) {
matchingProposals = matchingProposals
.filter(function (proposal) {
return selectedStates.some(function (state) {
return proposal.status.state.toLowerCase().indexOf(state.split('-')[0]) >= 0
})
})
// handle version-specific filtering options
if (selectedStates.some(function (state) { return state.match(/swift/i) })) {
matchingProposals = matchingProposals
.filter(function (proposal) {
return selectedStates.some(function (state) {
if (!(proposal.status.state === '.implemented')) return true // only filter among Implemented (N.N.N)
var version = state.split(/\D+/).filter(function (s) { return s.length }).join('.')
if (!version.length) return false // it's not a state that represents a version number
if (proposal.status.version === version) return true
return false
})
})
}
}
var filteredProposals = proposals.filter(function (proposal) {
return matchingProposals.indexOf(proposal) === -1
})
matchingProposals.forEach(function (proposal) {
var matchingElements = [].concat.apply([], document.querySelectorAll('.' + proposal.id))
matchingElements.forEach(function (element) { element.classList.remove('hidden') })
})
filteredProposals.forEach(function (proposal) {
var filteredElements = [].concat.apply([], document.querySelectorAll('.' + proposal.id))
filteredElements.forEach(function (element) { element.classList.add('hidden') })
})
updateProposalsCount(matchingProposals.length)
}
/**
* Parses a URI fragment and applies a search and filters to the page.
*
* Syntax (a query string within a fragment):
* fragment --> `#?` parameter-value-list
* parameter-value-list --> parameter-value | parameter-value-pair `&` parameter-value-list
* parameter-value-pair --> parameter `=` value
* parameter --> `proposal` | `status` | `version` | `search`
* value --> ** Any URL-encoded text. **
*
* For example:
* /#?proposal:SE-0180,SE-0123
* /#?status=rejected&version=3&search=access
*
* Four types of parameters are supported:
* - proposal: A comma-separated list of proposal IDs. Treated as an 'or' search.
* - filter: A comma-separated list of proposal statuses to apply as a filter.
* - version: A comma-separated list of Swift version numbers to apply as a filter.
* - search: Raw, URL-encoded text used to filter by individual term.
*
* @param {string} fragment - A URI fragment to use as the basis for a search.
*/
function _applyFragment (fragment) {
if (!fragment || fragment.substr(0, 2) !== '#?') return
fragment = fragment.substring(2) // remove the #?
// use this literal's keys as the source of truth for key-value pairs in the fragment
var actions = { proposal: [], search: null, status: [], version: [] }
// parse the fragment as a query string
Object.keys(actions).forEach(function (action) {
var pattern = new RegExp(action + '=([^=]+)(&|$)')
var values = fragment.match(pattern)
if (values) {
var value = values[1] // 1st capture group from the RegExp
if (action === 'search') {
value = decodeURIComponent(value)
} else {
value = value.split(',')
}
actions[action] = value
}
})
// perform key-specific parsing and checks
if (actions.proposal.length) {
document.querySelector('#search-filter').value = actions.proposal.join(',')
} else if (actions.search) {
document.querySelector('#search-filter').value = actions.search
}
if (actions.version.length) {
var versionSelections = actions.version.map(function (version) {
return document.querySelector('#filter-by-swift-' + _idSafeName(version))
}).filter(function (version) {
return !!version
})
versionSelections.forEach(function (versionSelection) {
versionSelection.checked = true
})
if (versionSelections.length) {
document.querySelector(
'#filter-by-' + states['.implemented'].className
).checked = true
}
}
// track this state specifically for toggling the version panel
var implementedSelected = false
// update the filter selections in the nav
if (actions.status.length) {
var statusSelections = actions.status.map(function (status) {
var stateName = Object.keys(states).filter(function (state) {
return states[state].className === status
})[0]
if (!stateName) return // fragment contains a nonexistent state
var state = states[stateName]
if (stateName === '.implemented') implementedSelected = true
return document.querySelector('#filter-by-' + state.className)
}).filter(function (status) {
return !!status
})
statusSelections.forEach(function (statusSelection) {
statusSelection.checked = true
})
}
// the version panel needs to be activated if any are specified
if (actions.version.length || implementedSelected) {
;['#version-options', '#version-options-label'].forEach(function (selector) {
document.querySelector('.filter-options')
.querySelector(selector).classList
.toggle('hidden')
})
}
// specifying any filter in the fragment should activate the filters in the UI
if (actions.version.length || actions.status.length) {
toggleFilterPanel()
toggleFiltering()
}
filterProposals()
}
/**
* Writes out the current search and filter settings to document.location
* via window.replaceState.
*/
function _updateURIFragment () {
var actions = { proposal: [], search: null, status: [], version: [] }
var search = document.querySelector('#search-filter')
if (search.value && search.value.match(/(SE-\d\d\d\d)($|((,SE-\d\d\d\d)+))/i)) {
actions.proposal = search.value.toUpperCase().split(',')
} else {
actions.search = search.value
}
var selectedVersions = document.querySelectorAll('.filter-by-swift-version:checked')
var versions = [].map.call(selectedVersions, function (checkbox) {
return checkbox.value.split('swift-swift-')[1].split('-').join('.')
})
actions.version = versions
var selectedStatuses = document.querySelectorAll('.filtered-by-status:checked')
var statuses = [].map.call(selectedStatuses, function (checkbox) {
var className = checkbox.value
var correspondingStatus = Object.keys(states).filter(function (status) {
if (states[status].className === className) return true
return false
})[0]
return states[correspondingStatus].className
})
// .implemented is redundant if any specific implementation versions are selected.
if (actions.version.length) {
statuses = statuses.filter(function (status) {
return status !== states['.implemented'].className
})
}
actions.status = statuses
// build the actual fragment string.
var fragments = []
if (actions.proposal.length) fragments.push('proposal=' + actions.proposal.join(','))
if (actions.status.length) fragments.push('status=' + actions.status.join(','))
if (actions.version.length) fragments.push('version=' + actions.version.join(','))
// encoding the search lets you search for `??` and other edge cases.
if (actions.search) fragments.push('search=' + encodeURIComponent(actions.search))
if (!fragments.length) {
window.history.replaceState(null, null, './')
return
}
var fragment = '#?' + fragments.join('&')
// avoid creating new history entries each time a search or filter updates
window.history.replaceState(null, null, fragment)
}
/** Helper to give versions like 3.0.1 an okay ID to use in a DOM element. (swift-3-0-1) */
function _idSafeName (name) {
return 'swift-' + name.replace(/\./g, '-')
}
/**
* Changes the text after 'Filtered by: ' to reflect the current status filters.
*
* After FILTER_DESCRIPTION_LIMIT filters are explicitly named, start combining the descriptive text
* to just state the number of status filters taking effect, not what they are.
*
* @param {string[]} selectedStateNames - CSS class names corresponding to which statuses were selected.
* Populated from the global `stateNames` array.
*/
function updateFilterDescription (selectedStateNames) {
var FILTER_DESCRIPTION_LIMIT = 2
var stateCount = selectedStateNames.length
// Limit the length of filter text on small screens.
if (window.matchMedia('(max-width: 414px)').matches) {
FILTER_DESCRIPTION_LIMIT = 1
}