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* DocumentLoader Module
* Handles loading and managing search documents from JSON index
*/
class DocumentLoader {
constructor() {
this.documents = {};
this.isLoaded = false;
}
/**
* Load documents from JSON index files
*/
async loadDocuments() {
try {
const data = await this.fetchDocumentData();
this.processDocuments(data);
this.isLoaded = true;
console.log(`✅ Document loader initialized with ${Object.keys(this.documents).length} documents`);
} catch (error) {
console.error('Failed to load search documents:', error);
throw error;
}
}
/**
* Fetch document data from various possible paths
*/
async fetchDocumentData() {
// Try different paths to account for different page depths
const possiblePaths = [
'./index.json',
'../index.json',
'../../index.json',
'../../../index.json'
];
for (const path of possiblePaths) {
try {
const response = await fetch(path);
if (response.ok) {
const data = await response.json();
console.log(`✅ Loaded search index from: ${path}`);
return data;
}
} catch (error) {
console.log(`❌ Failed to load from ${path}: ${error.message}`);
}
}
throw new Error('Failed to load search data from any path');
}
/**
* Process and filter documents from raw data
* Supports three formats:
* 1. Array of documents (new format): [{ id, title, ... }, ...]
* 2. Object with children (legacy): { children: [...] }
* 3. Single document (fallback): { id, title, ... }
*/
processDocuments(data) {
let allDocs;
if (Array.isArray(data)) {
// New format: root is an array of documents
allDocs = data;
} else if (data.children) {
// Legacy format: object with children array
allDocs = data.children;
} else {
// Fallback: single document
allDocs = [data];
}
// Filter out problematic documents
const filteredDocs = allDocs.filter(doc => this.isValidDocument(doc));
// Store documents by ID
filteredDocs.forEach(doc => {
this.documents[doc.id] = this.sanitizeDocument(doc);
});
console.log(`Processed ${filteredDocs.length} documents (filtered from ${allDocs.length} total)`);
}
/**
* Check if a document is valid for indexing
*/
isValidDocument(doc) {
const docId = doc.id || '';
return !docId.toLowerCase().includes('readme') &&
!docId.startsWith('_') &&
doc.title &&
doc.content;
}
/**
* Sanitize document content for safe indexing
* Supports both new schema fields and legacy fields
* Preserves dynamic facets as-is
*/
sanitizeDocument(doc) {
const sanitized = {
...doc,
title: this.sanitizeText(doc.title, 200),
// Add description as separate indexed field (for improved search relevance)
description: this.sanitizeText(doc.description, 300),
content: this.sanitizeText(doc.content, 5000),
summary: this.sanitizeText(doc.summary, 500),
headings: this.sanitizeHeadings(doc.headings),
headings_text: this.sanitizeText(doc.headings_text, 1000),
keywords: this.sanitizeArray(doc.keywords, 300),
tags: this.sanitizeArray(doc.tags, 200),
// Support both topics (new) and categories (legacy)
topics: this.sanitizeArray(doc.topics || doc.categories, 200),
// Support both audience (new) and personas (legacy)
audience: this.sanitizeArray(doc.audience || doc.personas, 200),
// Content type and difficulty
content_type: this.sanitizeText(doc.content_type, 50),
difficulty: this.sanitizeText(doc.difficulty, 50),
doc_type: this.sanitizeText(doc.doc_type, 50),
section_path: this.sanitizeArray(doc.section_path, 200),
author: this.sanitizeText(doc.author, 100)
};
// Preserve facets object (dynamic, user-defined keys)
if (doc.facets && typeof doc.facets === 'object') {
sanitized.facets = this.sanitizeFacets(doc.facets);
}
// Preserve legacy flat modality if present and no facets.modality
if (doc.modality && (!doc.facets || !doc.facets.modality)) {
sanitized.modality = this.sanitizeText(doc.modality, 50);
}
return sanitized;
}
/**
* Sanitize facets object (dynamic keys with string or array values)
*/
sanitizeFacets(facets) {
const sanitized = {};
Object.entries(facets).forEach(([key, value]) => {
if (Array.isArray(value)) {
sanitized[key] = value.map(v => String(v).substring(0, 100));
} else if (value) {
sanitized[key] = String(value).substring(0, 100);
}
});
return sanitized;
}
/**
* Sanitize text content with length limits
*/
sanitizeText(text, maxLength) {
if (!text || typeof text !== 'string') return '';
return text.substring(0, maxLength);
}
/**
* Sanitize array content
*/
sanitizeArray(arr, maxLength) {
if (!Array.isArray(arr)) return [];
return arr.map(item => String(item)).join(' ').substring(0, maxLength);
}
/**
* Sanitize headings array
*/
sanitizeHeadings(headings) {
if (!Array.isArray(headings)) return [];
return headings.map(heading => ({
text: this.sanitizeText(heading.text, 200),
level: Number(heading.level) || 1
}));
}
/**
* Get all loaded documents
*/
getDocuments() {
return this.documents;
}
/**
* Get a specific document by ID
*/
getDocument(id) {
return this.documents[id];
}
/**
* Get document count
*/
getDocumentCount() {
return Object.keys(this.documents).length;
}
/**
* Check if documents are loaded
*/
isReady() {
return this.isLoaded && Object.keys(this.documents).length > 0;
}
/**
* Get documents as array for indexing
*/
getDocumentsArray() {
return Object.values(this.documents);
}
/**
* Filter documents by criteria
*/
filterDocuments(filterFn) {
return this.getDocumentsArray().filter(filterFn);
}
/**
* Get document statistics
*/
getStatistics() {
const docs = this.getDocumentsArray();
return {
totalDocuments: docs.length,
documentsWithSummary: docs.filter(d => d.summary).length,
documentsWithHeadings: docs.filter(d => d.headings && d.headings.length > 0).length,
documentsWithTags: docs.filter(d => d.tags && d.tags.length > 0).length,
averageContentLength: docs.reduce((sum, d) => sum + (d.content?.length || 0), 0) / docs.length
};
}
}
// Make DocumentLoader available globally
window.DocumentLoader = DocumentLoader;
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