135 lines
4.3 KiB
JavaScript
135 lines
4.3 KiB
JavaScript
// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
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// How many characters to include on either side of match keyword
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const summaryInclude=60;
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// Options for fuse.js
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let fuseOptions = {
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shouldSort: true,
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includeMatches: true,
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tokenize: true,
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matchAllTokens: true,
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threshold: 0.0,
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location: 0,
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distance: 100,
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maxPatternLength: 64,
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minMatchCharLength: 3,
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keys: [
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{name:"title",weight:0.8},
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{name:"tags",weight:0.5},
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{name:"categories",weight:0.5},
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{name:"contents",weight:0.4}
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]
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};
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function getUrlParameter(name) {
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name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
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let regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
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let results = regex.exec(location.search);
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return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
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}
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let searchQuery = getUrlParameter('q');
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if(searchQuery){
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document.getElementById("search-query").value = searchQuery;
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executeSearch(searchQuery);
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} else {
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document.getElementById('search-results').innerHTML = "<p class=\"no-results\">Please enter a word or phrase above</p>";
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}
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function executeSearch(searchQuery) {
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// Look for "index.json" in the same directory where this script is called.
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fetch("/index.json").
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then(function (response) {
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return response.json()
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}).
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then(function (data) {
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let fuse = new Fuse(data, fuseOptions);
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let result = fuse.search(searchQuery);
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if (result.length > 0) {
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populateResults(result);
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} else {
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document.getElementById('search-results').innerHTML = "<p class=\"no-results\">No matches found</p>";
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}
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});
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}
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function populateResults(result){
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result.forEach( function (value, key) {
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let contents= value.item.contents;
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let snippet = "";
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let snippetHighlights=[];
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snippetHighlights.push(searchQuery);
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if(snippet.length<1){
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var getSentenceByWordRegex = new RegExp(
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`[^.?!]*(?<=[.?\\s!])${searchQuery}(?=[\\s.?!])[^.?!]*[.?!]`,
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'i'
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);
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var maxTextLength = summaryInclude*2
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// Index of the matched search term
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var indexOfMatch = contents.toLowerCase().indexOf(
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searchQuery.toLowerCase()
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);
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// Index of the first word of the sentence with the search term in it
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var indexOfSentence = contents.indexOf(
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getSentenceByWordRegex.exec(contents)
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);
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var start
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var cutStart = false
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// Is the match in the result?
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if(indexOfSentence+maxTextLength < indexOfMatch){
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// Make sure that the match is in the result
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start = indexOfMatch
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// This bool is used to replace the first part with '...'
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cutStart = true
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} else {
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// Match is in view, even if we show the whole sentence
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start = indexOfSentence
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}
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// Change end length to the text length if it is longer than
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// the text length to prevent problems
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var end = start + maxTextLength
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if (end > contents.length){
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end = contents.length
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}
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if(cutStart){
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// Replace first three characters with '...'
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end -= 3;
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snippet += "…" + contents.substring(start, end).trim();
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}
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else{
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snippet += contents.substring(start, end).trim();
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}
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}
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snippet += "…";
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// Lifted from https://stackoverflow.com/posts/3700369/revisions
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var elem = document.createElement('textarea');
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elem.innerHTML = snippet;
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var decoded = elem.value;
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// Pull template from hugo template definition
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let frag = document.getElementById('search-result-template').content.cloneNode(true);
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// Replace values
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frag.querySelector(".search_summary").setAttribute("id", "summary-" + key);
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frag.querySelector(".search_link").setAttribute("href", value.item.permalink);
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frag.querySelector(".search_title").textContent = value.item.title;
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frag.querySelector(".search_snippet").textContent = decoded;
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let tags = value.item.tags;
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if (tags) {
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frag.querySelector(".search_tags").textContent = tags;
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} else {
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frag.querySelector(".search_iftags").remove();
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}
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snippetHighlights.forEach( function (snipvalue, snipkey) {
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let markjs = new Mark(frag);
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markjs.mark(snipvalue);
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});
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document.getElementById("search-results").appendChild(frag);
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});
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}
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// @license-end
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