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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
import {makeSearchIndex, searchSpec} from '../shared-util/search-spec.js';
import {empty, groupArray, stitchArrays, unique, withEntries}
from '../shared-util/sugar.js';
import FlexSearch from '../lib/flexsearch/flexsearch.bundle.module.min.js';
let status = null;
let indexes = null;
let searchData = null;
onmessage = handleWindowMessage;
postStatus('alive');
main().then(
() => {
postStatus('ready');
},
error => {
console.error(`Search worker setup error:`, error);
postStatus('setup-error');
});
async function main() {
indexes =
withEntries(searchSpec, entries => entries
.map(([key, descriptor]) => [
key,
makeSearchIndex(descriptor, {FlexSearch}),
]));
searchData =
await fetch('/search-data/index.json')
.then(resp => resp.json());
// If this fails, it's because an outdated index was cached.
// TODO: If this fails, try again once with a cache busting url.
for (const [indexName, indexData] of Object.entries(searchData)) {
for (const [key, value] of Object.entries(indexData)) {
indexes[indexName].import(key, value);
}
}
}
function handleWindowMessage(message) {
switch (message.data.kind) {
case 'action':
handleWindowActionMessage(message);
break;
default:
console.warn(`Unknown message kind -> to search worker:`, message.data);
break;
}
}
async function handleWindowActionMessage(message) {
const {id} = message.data;
if (!id) {
console.warn(`Action without id -> to search worker:`, message.data);
return;
}
if (status !== 'ready') {
return postActionResult(id, 'reject', 'not ready');
}
let value;
switch (message.data.action) {
case 'search':
value = await performSearchAction(message.data.options);
break;
default:
console.warn(`Unknown action "${message.data.action}" -> to search worker:`, message.data);
return postActionResult(id, 'reject', 'unknown action');
}
await postActionResult(id, 'resolve', value);
}
function postStatus(newStatus) {
status = newStatus;
postMessage({
kind: 'status',
status: newStatus,
});
}
function postActionResult(id, status, value) {
postMessage({
kind: 'result',
id,
status,
value,
});
}
function performSearchAction({query, options}) {
const {generic, ...otherIndexes} = indexes;
const genericResults =
queryGenericIndex(generic, query, options);
const otherResults =
withEntries(otherIndexes, entries => entries
.map(([indexName, index]) => [
indexName,
index.search(query, options),
]));
return {
generic: genericResults,
...otherResults,
};
}
function queryGenericIndex(index, query, options) {
const terms = query.split(' ');
const particles = particulate(terms);
const groupedParticles =
groupArray(particles, ({length}) => length);
const queriesBy = keys =>
groupedParticles
.get(keys.length)
.flatMap(permutations)
.map(values => values.map(({terms}) => terms.join(' ')))
.map(values => Object.fromEntries(stitchArrays([keys, values])));
console.log(
queriesBy(['primaryName'])
.map(l => JSON.stringify(l))
.join('\n'));
console.log(
queriesBy(['primaryName', 'contributors'])
.map(l => JSON.stringify(l))
.join('\n'));
const boilerplate = queryBoilerplate(index);
const {fieldResults} = boilerplate.query(query, options);
const {primaryName} = fieldResults;
return boilerplate.constitute(primaryName);
}
function particulate(terms) {
if (empty(terms)) return [];
const results = [];
for (let slice = 1; slice <= 2; slice++) {
if (slice === terms.length) {
break;
}
const front = terms.slice(0, slice);
const back = terms.slice(slice);
results.push(...
particulate(back)
.map(result => [
{terms: front},
...result
]));
}
results.push([{terms}]);
return results;
}
// This function doesn't even come close to "performant",
// but it only operates on small data here.
function permutations(array) {
switch (array.length) {
case 0:
return [];
case 1:
return [array];
default:
return array.flatMap((item, index) => {
const behind = array.slice(0, index);
const ahead = array.slice(index + 1);
return (
permutations([...behind, ...ahead])
.map(rest => [item, ...rest]));
});
}
}
function queryBoilerplate(index, query, options) {
const idToDoc = {};
return {
idToDoc,
constitute: (ids) =>
ids.map(id => ({id, doc: idToDoc[id]})),
query: (query, options) => {
const rawResults =
index.search(query, options);
const fieldResults =
Object.fromEntries(
rawResults
.map(({field, result}) => [
field,
result.map(({id}) => id),
]));
Object.assign(
idToDoc,
Object.fromEntries(
rawResults
.flatMap(({result}) => result)
.map(({id, doc}) => [id, doc])));
return {rawResults, fieldResults};
},
};
}
|
