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update logic
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Taly
parent
03370dd066
commit
0cb69545db
5 changed files with 258 additions and 180 deletions
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@ -1,194 +1,263 @@
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import Page from '../models/page';
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import PageData from '../models/page';
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import Pages from '../controllers/pages';
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import urlify from '../utils/urlify';
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import Page from '../models/page';
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class Search {
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/**
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* Prepare words database
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*/
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public async index() {
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/**
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* Prepare pages content for the search
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* @todo - it should be done in the background
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*/
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const pages = await Pages.getAll();
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const pagesWords = pages.map(page => {
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const pageWords: string[] = [];
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private words: { [key: string]: {[key: string]: number} } = Object.create(null);
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private pages: PageData[] = [];
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page.body.blocks.forEach((block: any) => {
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let blockContent = '';
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const validBlocks = ['header', 'paragraph', 'list'];
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if (!validBlocks.includes(block.type)) {
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return;
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}
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switch (block.type) {
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case 'header':
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blockContent = block.data.text;
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break;
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case 'paragraph':
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blockContent = block.data.text
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break;
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case 'list':
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blockContent = block.data.items.join(' ');
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break;
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default:
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return;
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}
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const blockWords: string[] = blockContent
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.replace(/<[^>]*>?/gm, '')
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// lowercase all words
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.toLowerCase()
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// left only letters (+cyrillic) and numbers
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.replace(/[^a-zа-я0-9]/gi, ' ')
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// remove multiple spaces
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.replace(/\s+/g, ' ')
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// split to words by spaces
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.split(' ');
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pageWords.push(...blockWords);
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});
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const uniqueWords = [...new Set(pageWords)].sort();
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return {
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id: page._id,
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words: uniqueWords
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};
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});
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return pagesWords;
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}
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public async query(searchString: string) {
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const pages = await Pages.getAll();
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const pagesWords = await this.index();
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public async init() {
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this.pages = await this.getPages();
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/**
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* Search itself
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* Process all pages
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*/
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const searchWords = searchString.toLowerCase().split(' ');
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const goodPages = pagesWords.map(({ id, words}) => {
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const foundWords = searchWords.filter(
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word => {
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return words.filter(
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testWord => {
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return testWord.indexOf(word) === 0
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}
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).length > 0;
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}
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);
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for await (const page of this.pages) {
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const successRatio = foundWords.length / searchWords.length * 100;
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// if (page._id && !this.pages[page._id]) {
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// this.pages[page._id] = [];
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// }
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return {
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id,
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successRatio
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}
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});
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/**
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* Read content blocks from page
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*/
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for await (const block of page.body.blocks) {
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const blockRatio = this.getBlockRatio(block);
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const blockContent = this.getCleanTextFromBlock(block);
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const blockWords: string[] = this.splitTextToWords(blockContent);
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const foundPages = goodPages
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.filter(({ successRatio }) => successRatio > 75)
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.sort((a, b) => b.successRatio - a.successRatio)
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.slice(0, 10);
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// if (page._id) {
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// this.pages[page._id].push(...blockWords);
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// }
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const returnPages = pages.filter(page => foundPages.some(({ id }) => id === page._id))
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.map(page => {
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let shortBody = '';
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let flag = false;
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let section = '';
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let ratio = 0;
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page.body.blocks.forEach((block: any) => {
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if (flag) return;
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let blockContent = '';
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switch (block.type) {
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case 'header':
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blockContent = block.data.text;
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ratio = 1;
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section = blockContent;
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break;
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case 'paragraph':
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blockContent = block.data.text
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ratio = 0.5;
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break;
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case 'list':
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blockContent = block.data.items.join(' ');
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ratio = 0.5;
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break;
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default:
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return;
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/**
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* Process list of words in a block
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*/
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for await (const word of blockWords) {
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if (!this.words[word]) {
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this.words[word] = Object.create(null);
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}
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blockContent = blockContent
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.replace(/<[^>]*>?/gm, '');
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// .toLowerCase();
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searchWords.forEach(word => {
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// blockContent = blockContent.replace(word, `<span class="search-word">${word}</span>`);
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if (flag) return;
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if (blockContent.toLowerCase().indexOf(word) !== -1) {
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shortBody = this.highlightSubstring(blockContent, word);
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flag = true;
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if (page._id) {
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if (!this.words[word][page._id]) {
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this.words[word][page._id] = 0;
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}
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})
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});
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return {
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...page,
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shortBody,
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anchor: section.replace(/\s+/g, '-').toLowerCase(),
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section,
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};
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});
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// --------- START test ---------
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//
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const uniqWords = [...new Set(pagesWords.flatMap(page => page.words))].sort();
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//
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// uniqWords.forEach(word => {
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// console.log(word);
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// })
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// --------- END test ---------
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return {
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suggestions: uniqWords.filter(word => word.indexOf(searchWords.slice(-1)[0]) === 0),
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pages: returnPages
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/**
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* Add page id to the list of pages with this word
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*/
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this.words[word][page._id] += blockRatio;
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}
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}
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}
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}
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}
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private async search(searchString: string) {
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const pages = await this.query(searchString);
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public async query(searchString: string) {
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try {
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await this.init();
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} catch (error) {
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console.log(error);
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throw error;
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}
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return pages;
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const searchWords = searchString
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.trim()
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.toLowerCase()
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.replace(/\s+/g, ' ')
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.split(' ');
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const goodPages = (await this.getPagesByWords(searchWords))
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.slice(0, 10);
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const returnPages: {[key: string]: string|number, ratio: number}[] = [];
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goodPages.forEach(({ pageId, ratio }) => {
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const page = this.pages.filter(page => page._id === pageId).pop();
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if (!page) {
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return;
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}
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let section = '';
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page.body.blocks.forEach((block: any) => {
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let koef = 0;
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let blockContent = this.getCleanTextFromBlock(block);
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let shortBody = blockContent;
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if (block.type === 'header') {
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section = blockContent;
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}
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searchWords.forEach(word => {
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if (blockContent.toLowerCase().indexOf(word) !== -1) {
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koef += 1;
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}
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})
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shortBody = this.highlightSubstring(shortBody, searchWords);
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if (koef > 0) {
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returnPages.push({
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...page,
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shortBody,
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anchor: urlify(section),
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section,
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ratio: ratio * koef,
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})
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}
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});
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});
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// // --------- START test ---------
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// //
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// const uniqWords = [...new Set(pagesWords.flatMap(page => page.words))].sort();
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// //
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// // uniqWords.forEach(word => {
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// // console.log(word);
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// // })
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//
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// // --------- END test ---------
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// console.log('RESULT')
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// returnPages.forEach(page => {
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// console.log(page);
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// });
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//
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// return {
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// suggestions: uniqWords.filter(word => word.indexOf(searchWords.slice(-1)[0]) === 0),
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// pages: returnPages
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// }
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return {
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suggestions: [],
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pages: returnPages
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.sort((a, b) => b.ratio - a.ratio)
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.slice(0, 15)
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}
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}
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private highlightSubstring(text: string, word: string) {
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const wordRegExp = new RegExp(word, "ig");
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private async getPages() {
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return await Pages.getAll();
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}
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return text.replace(wordRegExp, '<span class="search-word">$&</span>');
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private async getPagesByWords(words: string[]) {
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const pagesList: {[key: string]: number} = {};
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Object.keys(this.words)
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.filter(word => words.indexOf(word) !== -1)
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.forEach(word => {
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Object.keys(this.words[word])
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.forEach(pageId => {
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if (!pagesList[pageId]) {
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pagesList[pageId] = 0;
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}
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pagesList[pageId] += this.words[word][pageId]
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})
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})
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const sortedPagesList = Object.keys(pagesList)
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.map(pageId => {
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return {
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pageId,
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ratio: pagesList[pageId]
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}
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})
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.sort((a, b) => b.ratio - a.ratio);
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return sortedPagesList;
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}
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private getUnique(elements: string[]) {
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return [...new Set(elements)].sort();
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}
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private getBlockRatio(block: any) {
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switch (block.type) {
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case 'header':
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return 6;
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case 'paragraph':
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return 2;
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case 'list':
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return 1;
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default:
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return 0;
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}
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}
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private getCleanTextFromBlock(block: any): string {
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let blockContent = '';
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switch (block.type) {
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case 'header':
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blockContent = block.data.text;
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break;
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case 'paragraph':
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blockContent = block.data.text
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break;
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case 'list':
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blockContent = block.data.items.join(' ');
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break;
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default:
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return blockContent;
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}
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blockContent = this.removeHTMLTags(blockContent);
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blockContent = this.removeHTMLSpecialCharacters(blockContent);
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return blockContent;
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}
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private removeHTMLTags(text: string) {
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return text.replace(/<[^>]*>?/gm, '');
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}
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private removeHTMLSpecialCharacters(text: string) {
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return text.replace(/&[^;]*;?/gm, '');
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}
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private splitTextToWords(text: string): string[] {
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return text
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// lowercase all words
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.toLowerCase()
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// remove punctuation
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.replace(/[.,;:]/gi, '')
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// left only letters (+cyrillic) and numbers
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.replace(/[^a-zа-я0-9]/gi, ' ')
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// remove multiple spaces
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.replace(/\s+/g, ' ')
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// split to words by spaces
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.split(' ')
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// ignore words shorter than 3 chars
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.filter(word => word.length >= 3);
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}
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/**
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* Highlight substring in string with a span wrapper
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*/
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private highlightSubstring(text: string, words: string|string[]) {
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if (typeof words === 'string') {
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words = [words];
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}
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const wordRegExp = new RegExp(words.join('|'), "ig");
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const CLASS_STYLE = 'search-word';
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return text.replace(wordRegExp, `<span class="${CLASS_STYLE}">$&</span>`);
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}
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}
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