ブログ記事のOrama検索実装の紹介用Gist

list.orma.json.gohtml

{{/* Generates an array of blog contents for indexing orama */}}
{{- $.Scratch.Add "item" slice -}}
{{- $section := $.Site.GetPage "section" .Section }}
{{- range .Site.AllPages -}}
  {{- if or (and (.IsDescendant $section) (and (not .Draft) (not .Params.private))) $section.IsHome -}}
    {{- if (and (eq .Section "post") .File) -}}
    {{- if .Params.Tags -}}
    {{- $.Scratch.Add "item" (dict "id" .File.UniqueID "date" .Date.UTC.Unix "dir" .File.Dir "lang" .Lang "lastmod" .Lastmod.UTC.Unix "permalink" .Permalink "publishdate" .PublishDate "title" .Title "tags" .Params.Tags "summary" .Summary "contents" .Plain)}}
    {{- else -}}
    {{- $.Scratch.Add "item" (dict "id" .File.UniqueID "date" .Date.UTC.Unix "dir" .File.Dir "lang" .Lang "lastmod" .Lastmod.UTC.Unix "permalink" .Permalink "publishdate" .PublishDate "title" .Title "summary" .Summary "contents" .Plain)}}
    {{- end -}}
    {{- end -}}
  {{- end -}}
{{- end -}}
{{- $.Scratch.Get "item" | jsonify -}}

persist_orama.mts

#!/usr/bin/env node

import { readFileSync, writeFileSync } from 'fs';
import { tokenize } from 'wakachigaki';
import { create, insertMultiple } from '@orama/orama';
import { persistToFile } from '@orama/plugin-data-persistence/server';
import { persist } from '@orama/plugin-data-persistence';
 

async function main() {
  
  console.log("exec from : " + process.cwd());
  const documents = readFileSync('../../public/orama.json', 'utf8');
  console.log("read file");
  const docsJson = JSON.parse(documents);
  console.log("parse json");
  const db = await create({
      schema: {
      id: 'string',
      title: 'string',
      summary: 'string',
      tags: 'string[]',
      date: 'number'
      },
  components: {
      tokenizer: {
        language: "english",
        stemming: false,
        normalizationCache: new Map(),
        tokenize: (raw) => {
              return tokenize(raw)
        },
      },
    },
    plugins: [ 
      {
          name: 'delete-contents-plugin',
          beforeInsert: (orama, id, document) => {
            delete document['contents'];
            console.log(document)
          }
      }
    ]
  })
      
  await insertMultiple(db, docsJson)
  console.log("inserted multiple");
  const data = await persist(db, 'dpack')
  
  writeFileSync("pearsist.dpack", data);

  console.log("finish!")
}

main();

search-orama.html

<script src="https://cdn.jsdelivr.net/npm/moment@2.22.2/min/moment.min.js"></script>
<script type="importmap">
{
  "imports": {
    "@orama/orama": "https://unpkg.com/@orama/orama@latest/dist/index.js",
    "@orama/highlight": "https://unpkg.com/@orama/highlight@latest/dist/index.js",
    "@orama/orama/internals": "https://unpkg.com/@orama/orama@latest/dist/internals.js",
    "@orama/plugin-data-persistence": "https://unpkg.com/@orama/plugin-data-persistence@latest/dist/index.js",
    "@msgpack/msgpack": "https://cdn.jsdelivr.net/npm/@msgpack/msgpack@2.8.0/+esm",
    "dpack": "https://cdn.jsdelivr.net/npm/dpack@0.6.22/+esm",
    "wakachigaki": "https://unpkg.com/wakachigaki@latest"
  }
}
</script>
<div id="search-searchbar">
    <label for="search-input" class="form-label">Search</label>
    <input type="search" class="form-control mb-3" id="search-input" />
</div>
<div id="stats"></div>
<div class="post-list" id="search-hits">
</div>
<script type="module">
import { tokenize } from 'wakachigaki'
import { create, search, insert, insertMultiple } from '@orama/orama'
import { restore } from '@orama/plugin-data-persistence';
import { Highlight } from '@orama/highlight'

const tmp = await fetch("/orama_index.json")
const persisted_index = await tmp.text()
const highlighter = new Highlight();

const db = await restore('dpack', persisted_index);
    
db.tokenizer = {
      language: "english",
      stemming: false,
      normalizationCache: new Map(),
      tokenize: (raw) => {
            return tokenize(raw)
      },
    }

const searchInput = document.getElementById("search-input");
["change", "cut", "focus", "input", "paste", "search"].forEach((type) =>
  searchInput.addEventListener(type, query)
);

async function query(event) {
  var sort = {
      property: 'date', 
      order: 'DESC'
  }
  if(event.target.value){
    sort = undefined
  }
  const searchResponse = await search(db, {
    term: event.target.value,
    properties: "*",
    sortBy: sort,
  });
  document.getElementById("stats").innerHTML = "<span>"+searchResponse.count+" results found in "+searchResponse.elapsed.formatted+"</span>";
  document.getElementById("search-hits").innerHTML = searchResponse.hits
    .map(
      (i) =>
        `
        <div class="post-item">
          <h2><a class="post-link" href="${i.document.permalink}">${highlighter.highlight(i.document.title, tokenize(event.target.value).join(" ")).HTML}</a></h2>
          <span class="post-meta">${moment.unix(i.document.date).format('MMM D, YYYY')}</span>
          <div class="post-snippet">${highlighter.highlight(i.document.summary.slice(0, 100), tokenize(event.target.value).join(" ")).HTML}</div>
          <hr/>
        </div>
        `
    )
    .join("");
}

</script>