@mickdarling/dollhousemcp
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DollhouseMCP - A Model Context Protocol (MCP) server that enables dynamic AI persona management from markdown files, allowing Claude and other compatible AI assistants to activate and switch between different behavioral personas.
138 lines • 16.5 kB
JavaScript
/**
* Persona loading and file management
*/
import * as fs from 'fs/promises';
import * as path from 'path';
import { ensureDirectory, generateUniqueId } from '../utils/filesystem.js';
import { SecureYamlParser } from '../security/secureYamlParser.js';
import { SecurityError } from '../errors/SecurityError.js';
export class PersonaLoader {
personasDir;
constructor(personasDir) {
this.personasDir = personasDir;
}
/**
* Load all personas from the personas directory
*/
async loadAll(getCurrentUser) {
// Ensure directory exists
await ensureDirectory(this.personasDir);
const personas = new Map();
try {
const files = await fs.readdir(this.personasDir);
const markdownFiles = files.filter(file => file.endsWith('.md'));
for (const file of markdownFiles) {
try {
const persona = await this.loadPersona(file, getCurrentUser);
if (persona) {
personas.set(file, persona);
console.error(`Loaded persona: ${persona.metadata.name} (${persona.unique_id})`);
}
}
catch (error) {
console.error(`Error loading persona ${file}: ${error}`);
}
}
}
catch (error) {
console.error(`Error reading personas directory: ${error}`);
}
return personas;
}
/**
* Load a single persona from file
*/
async loadPersona(filename, getCurrentUser) {
try {
const filePath = path.join(this.personasDir, filename);
const fileContent = await fs.readFile(filePath, 'utf-8');
// Use secure YAML parser instead of direct gray-matter
let parsed;
try {
parsed = SecureYamlParser.safeMatter(fileContent);
}
catch (error) {
if (error instanceof SecurityError) {
console.error(`Security threat detected in persona ${filename}: ${error.message}`);
return null;
}
throw error;
}
const metadata = parsed.data;
const content = parsed.content;
if (!metadata.name) {
metadata.name = path.basename(filename, '.md');
}
// Generate unique ID if not present
let uniqueId = metadata.unique_id;
if (!uniqueId) {
const authorForId = metadata.author || getCurrentUser() || undefined;
uniqueId = generateUniqueId(metadata.name, authorForId);
console.error(`Generated unique ID for ${metadata.name}: ${uniqueId}`);
}
// Set default values for metadata fields
this.setDefaultMetadata(metadata);
const persona = {
metadata,
content,
filename,
unique_id: uniqueId,
};
return persona;
}
catch (error) {
console.error(`Error loading persona ${filename}: ${error}`);
return null;
}
}
/**
* Save a persona to file
*/
async savePersona(persona) {
const filePath = path.join(this.personasDir, persona.filename);
// Use secure YAML stringification
const secureParser = SecureYamlParser.createSecureMatterParser();
const fileContent = secureParser.stringify(persona.content, persona.metadata);
await fs.writeFile(filePath, fileContent, 'utf-8');
}
/**
* Delete a persona file
*/
async deletePersona(filename) {
const filePath = path.join(this.personasDir, filename);
await fs.unlink(filePath);
}
/**
* Check if a persona file exists
*/
async personaExists(filename) {
try {
const filePath = path.join(this.personasDir, filename);
await fs.access(filePath);
return true;
}
catch {
return false;
}
}
/**
* Set default metadata values
*/
setDefaultMetadata(metadata) {
if (!metadata.category)
metadata.category = 'general';
if (!metadata.age_rating)
metadata.age_rating = 'all';
if (!metadata.content_flags)
metadata.content_flags = [];
if (metadata.ai_generated === undefined)
metadata.ai_generated = false;
if (!metadata.generation_method)
metadata.generation_method = 'human';
if (!metadata.price)
metadata.price = 'free';
if (!metadata.license)
metadata.license = 'CC-BY-SA-4.0';
}
}
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* Persona loading and file management\n */\n\nimport * as fs from 'fs/promises';\nimport * as path from 'path';\nimport matter from 'gray-matter';\nimport { Persona, PersonaMetadata } from '../types/persona.js';\nimport { ensureDirectory, generateUniqueId } from '../utils/filesystem.js';\nimport { SecureYamlParser } from '../security/secureYamlParser.js';\nimport { SecurityError } from '../errors/SecurityError.js';\n\nexport class PersonaLoader {\n  private personasDir: string;\n  \n  constructor(personasDir: string) {\n    this.personasDir = personasDir;\n  }\n  \n  /**\n   * Load all personas from the personas directory\n   */\n  async loadAll(getCurrentUser: () => string | null): Promise<Map<string, Persona>> {\n    // Ensure directory exists\n    await ensureDirectory(this.personasDir);\n    \n    const personas = new Map<string, Persona>();\n    \n    try {\n      const files = await fs.readdir(this.personasDir);\n      const markdownFiles = files.filter(file => file.endsWith('.md'));\n      \n      for (const file of markdownFiles) {\n        try {\n          const persona = await this.loadPersona(file, getCurrentUser);\n          if (persona) {\n            personas.set(file, persona);\n            console.error(`Loaded persona: ${persona.metadata.name} (${persona.unique_id})`);\n          }\n        } catch (error) {\n          console.error(`Error loading persona ${file}: ${error}`);\n        }\n      }\n    } catch (error) {\n      console.error(`Error reading personas directory: ${error}`);\n    }\n    \n    return personas;\n  }\n  \n  /**\n   * Load a single persona from file\n   */\n  async loadPersona(filename: string, getCurrentUser: () => string | null): Promise<Persona | null> {\n    try {\n      const filePath = path.join(this.personasDir, filename);\n      const fileContent = await fs.readFile(filePath, 'utf-8');\n      \n      // Use secure YAML parser instead of direct gray-matter\n      let parsed;\n      try {\n        parsed = SecureYamlParser.safeMatter(fileContent);\n      } catch (error) {\n        if (error instanceof SecurityError) {\n          console.error(`Security threat detected in persona ${filename}: ${error.message}`);\n          return null;\n        }\n        throw error;\n      }\n      \n      const metadata = parsed.data as PersonaMetadata;\n      const content = parsed.content;\n      \n      if (!metadata.name) {\n        metadata.name = path.basename(filename, '.md');\n      }\n      \n      // Generate unique ID if not present\n      let uniqueId = metadata.unique_id;\n      if (!uniqueId) {\n        const authorForId = metadata.author || getCurrentUser() || undefined;\n        uniqueId = generateUniqueId(metadata.name, authorForId);\n        console.error(`Generated unique ID for ${metadata.name}: ${uniqueId}`);\n      }\n      \n      // Set default values for metadata fields\n      this.setDefaultMetadata(metadata);\n      \n      const persona: Persona = {\n        metadata,\n        content,\n        filename,\n        unique_id: uniqueId,\n      };\n      \n      return persona;\n    } catch (error) {\n      console.error(`Error loading persona ${filename}: ${error}`);\n      return null;\n    }\n  }\n  \n  /**\n   * Save a persona to file\n   */\n  async savePersona(persona: Persona): Promise<void> {\n    const filePath = path.join(this.personasDir, persona.filename);\n    \n    // Use secure YAML stringification\n    const secureParser = SecureYamlParser.createSecureMatterParser();\n    const fileContent = secureParser.stringify(persona.content, persona.metadata);\n    \n    await fs.writeFile(filePath, fileContent, 'utf-8');\n  }\n  \n  /**\n   * Delete a persona file\n   */\n  async deletePersona(filename: string): Promise<void> {\n    const filePath = path.join(this.personasDir, filename);\n    await fs.unlink(filePath);\n  }\n  \n  /**\n   * Check if a persona file exists\n   */\n  async personaExists(filename: string): Promise<boolean> {\n    try {\n      const filePath = path.join(this.personasDir, filename);\n      await fs.access(filePath);\n      return true;\n    } catch {\n      return false;\n    }\n  }\n  \n  /**\n   * Set default metadata values\n   */\n  private setDefaultMetadata(metadata: PersonaMetadata): void {\n    if (!metadata.category) metadata.category = 'general';\n    if (!metadata.age_rating) metadata.age_rating = 'all';\n    if (!metadata.content_flags) metadata.content_flags = [];\n    if (metadata.ai_generated === undefined) metadata.ai_generated = false;\n    if (!metadata.generation_method) metadata.generation_method = 'human';\n    if (!metadata.price) metadata.price = 'free';\n    if (!metadata.license) metadata.license = 'CC-BY-SA-4.0';\n  }\n}"]}