knowledgegraph-mcp/dist/utils.js

MCP server for enabling persistent knowledge storage for Claude through a knowledge graph with multiple storage backends

import { homedir } from 'os';
import { join } from 'path';
import { mkdirSync, existsSync } from 'fs';
// Project utility functions
export function resolveProject(toolProject) {
    return toolProject || process.env.KNOWLEDGEGRAPH_PROJECT || 'knowledgegraph_default_project';
}
export function validateProjectName(project) {
    // Validate project name for file system safety
    return /^[a-zA-Z0-9_-]+$/.test(project) && project.length > 0 && project.length <= 100;
}
export function sanitizeProjectName(project) {
    // Remove any characters that aren't alphanumeric, underscore, or hyphen
    return project.replace(/[^a-zA-Z0-9_-]/g, '_');
}
// SQLite path utility functions
export function getDefaultSQLitePath() {
    // Check if custom path is provided via environment variable
    const customPath = process.env.KNOWLEDGEGRAPH_SQLITE_PATH;
    if (customPath) {
        return customPath;
    }
    // Default to {home directory}/.knowledge-graph/knowledgegraph.db
    const homeDir = homedir();
    const knowledgeGraphDir = join(homeDir, '.knowledge-graph');
    // Ensure the directory exists
    if (!existsSync(knowledgeGraphDir)) {
        try {
            mkdirSync(knowledgeGraphDir, { recursive: true });
            console.log(`Created knowledge graph directory: ${knowledgeGraphDir}`);
        }
        catch (error) {
            console.warn(`Failed to create knowledge graph directory: ${error}`);
            // Fall back to current directory if home directory creation fails
            return './knowledgegraph.db';
        }
    }
    return join(knowledgeGraphDir, 'knowledgegraph.db');
}
export function resolveSQLiteConnectionString() {
    const dbPath = getDefaultSQLitePath();
    return `sqlite://${dbPath}`;
}
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