Update: 用户不愿意付费使用algolia，换位flexsearch
algolia flexsearch
公司后端选择的全站搜索引擎是algolia，它支持react并有封装好的一系列react组件，后来用户不愿意付费所以进行更换
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/* eslint-disable no-await-in-loop */
/* eslint-disable no-restricted-globals */
let documents = null;
const httpGet = (url) => {
return new Promise((resolve) => {
const xhr = new XMLHttpRequest();
xhr.addEventListener('load', () => {
try {
const responseData = JSON.parse(xhr.responseText);
resolve(responseData);
} catch (e) {
resolve(xhr.responseText);
}
});
xhr.open('GET', url);
xhr.send();
});
};
const getDocuments = async (baseURL) => {
const url = baseURL + 'baseUrl'
const response = await httpGet(url);
response.forEach(({ items }) => {
if (documents === null) {
documents = [];
}
documents = documents.concat(items);
});
};
const initSearch = async ({ baseURL }) => {
if (documents === null) {
await getDocuments(baseURL);
// buildIndex();
postMessage({ action: 'initSearch' });
}
};
const dumbSearch = (query) => {
const safeQuery = query.replace(/[.*+?^${}()|[\]\\]/gi, '\\$&');
const queryParts = safeQuery
.split(' ')
.map(p => p.replace(/^(the|of|de|&|by|and|an?|with|this|that|these|or|from|as|at|for)$/gi, ''))
.filter(p => p.length > 0);
if (queryParts.indexOf(safeQuery) === -1) {
queryParts.unshift(safeQuery);
}
const regexps = queryParts.map(q => new RegExp(q, 'gi'));
const fields = [
['title', { boost: 10, tokenize: true }],
['body', { boost: 0.5 }],
['summary'],
['cuisine_types', { boost: 5 }],
['category', { boost: 5 }],
['type', { boost: 8 }],
['hotel'],
['subtitles', { boost: 2 }],
['meta'],
['category'],
['rooms'],
['path', { boost: 3 }],
];
const ids = [];
const results = documents
.map(doc => {
let score = 0;
fields.forEach(([fieldname, options = {}]) => {
const { boost = 1, tokenize = false } = options;
let value = doc[fieldname];
if (value === undefined || value === null) {
return;
}
if (Array.isArray(value)) {
value = value.join(' ');
}
regexps.forEach((regexp, i) => {
const matches = value.match(regexp);
if (matches === null || matches.length === 0) {
return;
}
const exact = i === 0 ? 20 : 0.5;
let wordMatch = !exact ? 0.3 : 1;
if (tokenize && !exact) {
const tokens = value.replace(/[,.?;:"“-]/gi, '').toLowerCase().split(' ');
const match = matches[0].toLowerCase();
if (tokens.indexOf(match) >= 0) {
wordMatch = 1;
}
}
score += (1 + Math.log(matches.length)) * boost * exact * wordMatch;
});
});
return [score, doc];
})
.filter(([score]) => score > 1)
.sort((res1, res2) => res1[0] > res2[0] ? -1 : 1)
.reduce((out, [, doc]) => {
if (ids.indexOf(doc.uuid) >= 0) {
return out;
}
ids.push(doc.uuid);
return [
...out,
doc,
];
}, []);
return results;
};
const sleep = (duration) => {
return new Promise(resolve => {
setTimeout(() => {
resolve();
}, duration);
});
};
const search = async ({ query }) => {
while (documents === null) {
await sleep(200);
}
postMessage({ action: 'search', results: dumbSearch(query) });
};
if (process.env.IS_BROWSER) {
addEventListener('message', event => {
const { data } = event;
const { action, args } = data;
switch (action) {
case 'initSearch':
initSearch(...args);
break;
case 'search':
search(...args);
break;
default:
break;
}
});
}
