1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/* global Fuse, Mark */
function ready(fn) {
if (document.readyState !== 'loading') {
fn();
} else {
document.addEventListener('DOMContentLoaded', fn);
}
}
ready(doSearch);
const summaryInclude = 60;
const fuseOptions = {
shouldSort: true,
includeMatches: true,
matchAllTokens: true,
threshold: 0.0, // for parsing diacritics
tokenize: true,
location: 0,
distance: 100,
maxPatternLength: 32,
minMatchCharLength: 1,
keys: [{
name: 'title',
weight: 0.8
},
{
name: 'contents',
weight: 0.5
},
{
name: 'tags',
weight: 0.3
},
{
name: 'categories',
weight: 0.3
}
]
};
function param(name) {
return decodeURIComponent((window.location.search.split(`${name}=`)[1] || '').split('&')[0]).replace(/\+/g, ' ');
}
const searchQuery = param('s');
function doSearch() {
if (searchQuery) {
document.getElementById('search-query').value = searchQuery;
executeSearch(searchQuery);
} else {
const para = document.createElement('P');
para.innerText = 'Please enter a word or phrase above';
document.getElementById('search-results').appendChild(para);
}
}
function getJSON(url, fn) {
const request = new XMLHttpRequest();
request.open('GET', url, true);
request.onload = function () {
if (request.status >= 200 && request.status < 400) {
const data = JSON.parse(request.responseText);
fn(data);
} else {
console.error(`Target reached on ${url} with error ${request.status}`);
}
};
request.onerror = function () {
console.error(`Connection error ${request.status}`);
};
request.send();
}
function executeSearch(searchQuery) {
getJSON(`/${document.LANG}/index.json`, (data) => {
const pages = data;
const fuse = new Fuse(pages, fuseOptions);
const result = fuse.search(searchQuery);
document.getElementById('search-results').innerHTML = '';
if (result.length > 0) {
populateResults(result);
} else {
const para = document.createElement('P');
para.innerText = 'No matches found';
document.getElementById('search-results').appendChild(para);
}
});
}
function populateResults(result) {
result.forEach((value, key) => {
const content = value.item.contents;
let snippet = '';
const snippetHighlights = [];
if (fuseOptions.tokenize) {
snippetHighlights.push(searchQuery);
value.matches.forEach((mvalue) => {
if (mvalue.key === 'tags' || mvalue.key === 'categories') {
snippetHighlights.push(mvalue.value);
} else if (mvalue.key === 'contents') {
const ind = content.toLowerCase().indexOf(searchQuery.toLowerCase());
const start = ind - summaryInclude > 0 ? ind - summaryInclude : 0;
const end = ind + searchQuery.length + summaryInclude < content.length ? ind + searchQuery.length + summaryInclude : content.length;
snippet += content.substring(start, end);
if (ind > -1) {
snippetHighlights.push(content.substring(ind, ind + searchQuery.length));
} else {
snippetHighlights.push(mvalue.value.substring(mvalue.indices[0][0], mvalue.indices[0][1] - mvalue.indices[0][0] + 1));
}
}
});
}
if (snippet.length < 1) {
snippet += content.substring(0, summaryInclude * 2);
}
// pull template from hugo template definition
const templateDefinition = document.getElementById('search-result-template').innerHTML;
// replace values
const output = render(templateDefinition, {
key,
title: value.item.title,
link: value.item.permalink,
tags: value.item.tags,
categories: value.item.categories,
snippet
});
document.getElementById('search-results').appendChild(htmlToElement(output));
snippetHighlights.forEach((snipvalue) => {
new Mark(document.getElementById(`summary-${key}`)).mark(snipvalue);
});
});
}
function render(templateString, data) {
let conditionalMatches, copy;
const conditionalPattern = /\$\{\s*isset ([a-zA-Z]*) \s*\}(.*)\$\{\s*end\s*}/g;
// since loop below depends on re.lastInxdex, we use a copy to capture any manipulations whilst inside the loop
copy = templateString;
while ((conditionalMatches = conditionalPattern.exec(templateString)) !== null) {
if (data[conditionalMatches[1]]) {
// valid key, remove conditionals, leave content.
copy = copy.replace(conditionalMatches[0], conditionalMatches[2]);
} else {
// not valid, remove entire section
copy = copy.replace(conditionalMatches[0], '');
}
}
templateString = copy;
// now any conditionals removed we can do simple substitution
let key, find, re;
for (key of Object.keys(data)) {
find = `\\$\\{\\s*${key}\\s*\\}`;
re = new RegExp(find, 'g');
templateString = templateString.replace(re, data[key]);
}
return templateString;
}
/**
* By Mark Amery: https://stackoverflow.com/a/35385518
* @param {String} HTML representing a single element
* @return {Element}
*/
function htmlToElement(html) {
const template = document.createElement('template');
html = html.trim(); // Never return a text node of whitespace as the result
template.innerHTML = html;
return template.content.firstChild;
}
|
