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View = require( '../mobile.startup/View' ),
util = require( '../mobile.startup/util' ),
langUtil = require( './util' ),
mfExtend = require( '../mobile.startup/mfExtend' );
/**
* Overlay displaying a structured list of languages for a page
*
* @class LanguageSearcher
* @extends View
*
* @param {Object} props Configuration options
* @param {Object[]} props.languages list of language objects as returned by the API
* @param {Array|boolean} props.variants language variant objects
* or false if no variants exist
* @param {boolean} props.showSuggestedLanguages If the suggested languages
* section should be rendered.
* @param {string} [props.deviceLanguage] the device's primary language
* @param {Function} [props.onOpen] callback that fires on opening the searcher
*/
function LanguageSearcher( props ) {
/**
* @prop {StructuredLanguages} languages` JSDoc.
*/
const languages = langUtil.getStructuredLanguages(
props.languages,
props.variants,
langUtil.getFrequentlyUsedLanguages(),
props.showSuggestedLanguages,
props.deviceLanguage
);
View.call(
this,
util.extend(
{
className: 'language-searcher',
events: {
'click a': 'onLinkClick',
'input .search': 'onSearchInput'
},
// the rest are template properties
inputPlaceholder: mw.msg( 'mobile-frontend-languages-structured-overlay-search-input-placeholder' ),
// we can't rely on CSS only to uppercase the headings. See https://stackoverflow.com/questions/3777443/css-text-transform-not-working-properly-for-turkish-characters
allLanguagesHeader: mw.msg( 'mobile-frontend-languages-structured-overlay-all-languages-header' ).toLocaleUpperCase(),
suggestedLanguagesHeader: mw.msg( 'mobile-frontend-languages-structured-overlay-suggested-languages-header' ).toLocaleUpperCase(),
noResultsFoundHeader: mw.msg( 'mobile-frontend-languages-structured-overlay-no-results' ),
noResultsFoundMessage: mw.msg( 'mobile-frontend-languages-structured-overlay-no-results-body' ),
allLanguages: languages.all,
allLanguagesCount: languages.all.length,
suggestedLanguages: languages.suggested,
suggestedLanguagesCount: languages.suggested.length,
showSuggestedLanguagesHeader: languages.suggested.length > 0
},
props
)
);
// defer event to be emitted after event handler has been registered
const onOpen = props.onOpen;
if ( !onOpen ) {
return;
}
const searcher = this;
setTimeout( () => {
onOpen( searcher );
}, 0 );
}
mfExtend( LanguageSearcher, View, {
/**
* @inheritdoc
* @memberof LanguageSearcher
* @instance
*/
template: util.template( `
<div class="panel">
<div class="panel-body search-box">
<input type="search" class="search" placeholder="{{inputPlaceholder}}">
</div>
</div>
<div class="overlay-content-body">
{{#showSuggestedLanguagesHeader}}
<h3 class="list-header">{{suggestedLanguagesHeader}}</h3>
{{/showSuggestedLanguagesHeader}}
{{#suggestedLanguagesCount}}
<ol class="site-link-list suggested-languages">
{{#suggestedLanguages}}
<li>
<a href="{{url}}" class="{{lang}}" hreflang="{{lang}}" lang="{{lang}}" dir="{{dir}}">
<span class="autonym">{{autonym}}</span>
{{#title}}
<span class="title">{{title}}</span>
{{/title}}
</a>
</li>
{{/suggestedLanguages}}
</ol>
{{/suggestedLanguagesCount}}
{{#bannerHTML}}
<div class="language-search-banner">
{{{.}}}
</div>
{{/bannerHTML}}
{{#allLanguagesCount}}
<h3 class="list-header">{{allLanguagesHeader}} ({{allLanguagesCount}})</h3>
<ul class="site-link-list all-languages">
{{#allLanguages}}
<li>
<a href="{{url}}" class="{{lang}}" hreflang="{{lang}}" lang="{{lang}}" dir="{{dir}}">
<span class="autonym">{{autonym}}</span>
{{#title}}
<span class="title">{{title}}</span>
{{/title}}
</a>
</li>
{{/allLanguages}}
</ul>
{{/allLanguagesCount}}
<section class="empty-results hidden">
<h4 class="empty-results-header">{{noResultsFoundHeader}}</h4>
<p class="empty-results-body">{{noResultsFoundMessage}}</p>
</section>
</div>
` ),
/**
* @inheritdoc
* @memberof LanguageSearcher
* @instance
*/
postRender: function () {
// cache
this.$siteLinksList = this.$el.find( '.site-link-list' );
this.$languageItems = this.$siteLinksList.find( 'a' );
this.$subheaders = this.$el.find( 'h3' );
this.$emptyResultsSection = this.$el.find( '.empty-results' );
},
/**
* Method that can be called outside MF extension to render
* a banner inside the language overlay.
*
* @stable for use inside ContentTranslation
* @param {string} bannerHTML
*/
addBanner: function ( bannerHTML ) {
this.options.bannerHTML = bannerHTML;
this.options.showSuggestedLanguagesHeader = true;
this.render();
},
/**
* Article link click event handler
*
* @memberof LanguageSearcher
* @instance
* @param {jQuery.Event} ev
*/
onLinkClick: function ( ev ) {
const $link = this.$el.find( ev.currentTarget ),
lang = $link.attr( 'lang' );
/**
* @event mobileFrontend.languageSearcher.linkClick
* @internal for use in GrowthExperiments only.
*/
mw.hook( 'mobileFrontend.languageSearcher.linkClick' ).fire( lang );
langUtil.saveLanguageUsageCount( lang, langUtil.getFrequentlyUsedLanguages() );
},
/**
* Search input handler
*
* @memberof LanguageSearcher
* @instance
* @param {jQuery.Event} ev Event object.
*/
onSearchInput: function ( ev ) {
this.filterLanguages( this.$el.find( ev.target ).val().toLowerCase() );
},
/**
* Filter the language list to only show languages that match the current search term.
*
* @memberof LanguageSearcher
* @instance
* @param {string} searchQuery of search term (lowercase).
*/
filterLanguages: function ( searchQuery ) {
const filteredList = [];
if ( searchQuery ) {
this.options.languages.forEach( function ( language ) {
const langname = language.langname;
// search by language code or language name
if ( language.autonym.toLowerCase().indexOf( searchQuery ) > -1 ||
( langname && langname.toLowerCase().indexOf( searchQuery ) > -1 ) ||
language.lang.toLowerCase().indexOf( searchQuery ) > -1
) {
filteredList.push( language.lang );
}
} );
if ( this.options.variants ) {
this.options.variants.forEach( function ( variant ) {
// search by variant code or variant name
if ( variant.autonym.toLowerCase().indexOf( searchQuery ) > -1 ||
variant.lang.toLowerCase().indexOf( searchQuery ) > -1
) {
filteredList.push( variant.lang );
}
} );
}
this.$languageItems.addClass( 'hidden' );
if ( filteredList.length ) {
this.$siteLinksList.find(
`.${mw.util.escapeRegExp( filteredList.join( ',.' ) )}`
).removeClass( 'hidden' );
this.$emptyResultsSection.addClass( 'hidden' );
} else {
this.$emptyResultsSection.removeClass( 'hidden' );
// Fire with the search query and the DOM element corresponding to no-results
// message so that it can be customized in hook handler
/**
* @event mobileFrontend.editorOpening
* @internal for use in ContentTranslation only.
*/
mw.hook( 'mobileFrontend.languageSearcher.noresults' )
.fire( searchQuery, this.$emptyResultsSection.get( 0 ) );
}
this.$siteLinksList.addClass( 'filtered' );
this.$subheaders.addClass( 'hidden' );
} else {
this.$languageItems.removeClass( 'hidden' );
this.$siteLinksList.removeClass( 'filtered' );
this.$subheaders.removeClass( 'hidden' );
this.$emptyResultsSection.addClass( 'hidden' );
}
}
} );
module.exports = LanguageSearcher;
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