Ghost/ghost/sodo-search/src/search-index.js

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import elasticlunr from 'elasticlunr';
export default class SearchIndex {
constructor({apiUrl, apiKey}) {
this.apiUrl = apiUrl;
this.apiKey = apiKey;
this.postsIndex = null;
this.authorsIndex = null;
this.init = this.init.bind(this);
this.search = this.search.bind(this);
}
#updatePostIndex(data) {
data.posts.forEach((post) => {
this.postsIndex.addDoc({
id: post.id,
title: post.title,
excerpt: post.excerpt,
slug: post.slug,
url: post.url
});
});
}
#updateAuthorsIndex(data) {
data.authors.forEach((author) => {
this.authorsIndex.addDoc({
id: author.id,
name: author.name,
url: author.url,
profile_image: author.profile_image
});
});
}
#updateTagsIndex(data) {
data.tags.forEach((tag) => {
this.tagsIndex.addDoc({
id: tag.id,
name: tag.name,
url: tag.url
});
});
}
async init() {
// remove default stop words to search of *any* word
elasticlunr.clearStopWords();
const postsAPIUrl = `${this.apiUrl}/posts/?key=${this.apiKey}&limit=all&fields=id,slug,title,excerpt,url,updated_at,visibility&order=updated_at%20desc&formats=plaintext`;
const authorsAPIUrl = `${this.apiUrl}/authors/?key=${this.apiKey}&limit=all&fields=id,slug,name,url,profile_image`;
const tagsAPIUrl = `${this.apiUrl}/tags/?key=${this.apiKey}&limit=all&fields=id,slug,name,url`;
const postsResponse = await fetch(postsAPIUrl);
const posts = await postsResponse.json();
this.postsIndex = elasticlunr();
this.postsIndex.addField('title');
this.postsIndex.addField('url');
this.postsIndex.addField('excerpt');
this.postsIndex.setRef('id');
if (posts.posts.length > 0) {
this.#updatePostIndex(posts);
}
const authorsResponse = await fetch(authorsAPIUrl);
const authors = await authorsResponse.json();
this.authorsIndex = elasticlunr();
this.authorsIndex.addField('name');
this.authorsIndex.addField('url');
this.authorsIndex.addField('profile_image');
this.authorsIndex.setRef('id');
if (authors.authors.length > 0) {
this.#updateAuthorsIndex(authors);
}
const tagsResponse = await fetch(tagsAPIUrl);
const tags = await tagsResponse.json();
this.tagsIndex = elasticlunr();
this.tagsIndex.addField('name');
this.tagsIndex.addField('url');
this.tagsIndex.setRef('id');
if (tags.tags.length > 0) {
this.#updateTagsIndex(tags);
}
}
search(value) {
const posts = this.postsIndex.search(value, {
fields: {
title: {boost: 1},
excerpt: {boost: 1}
},
expand: true
});
const authors = this.authorsIndex.search(value, {
fields: {
name: {boost: 1}
},
expand: true
});
const tags = this.tagsIndex.search(value, {
fields: {
name: {boost: 1}
},
expand: true
});
return {
posts: posts.map((doc) => {
return this.postsIndex.documentStore.docs[doc.ref];
}),
authors: authors.map((doc) => {
return this.authorsIndex.documentStore.docs[doc.ref];
}),
tags: tags.map((doc) => {
return this.tagsIndex.documentStore.docs[doc.ref];
})
};
}
}