# All files / lib catalog.js

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     import fs from 'fs-extra';
    import path from 'path';
    import { fileURLToPath } from 'url';

    const __filename = fileURLToPath(import.meta.url);
    const __dirname = path.dirname(__filename);

    /**
     * Catalog module for managing skill catalog data.
     * Provides loading, searching, filtering, and validation of catalog.json.
     */

    /**
     * Default catalog file path (Rosetta's built-in catalog)
     */
    const DEFAULT_CATALOG_PATH = path.join(__dirname, '..', 'catalog.json');

    /**
     * Catalog schema definition for validation
     */
    const CATALOG_SCHEMA = {
      version: 'string',
      skills: 'array'
    };

    /**
     * Skill schema definition for validation
     */
    const SKILL_SCHEMA = {
      name: 'string',
      displayName: 'string',
      description: 'string',
      repoUrl: 'string',
      domains: 'array',
      tags: 'array',
      intentKeywords: 'array',
      author: 'string',
      stars: 'number',
      lastUpdated: 'string',
      provides: 'array',
      requires: 'array',
      enhances: 'array',
      icon: 'string',
      color: 'string'
    };

    /**
     * Validates that a value matches expected type
     * @param {*} value - Value to validate
     * @param {string} type - Expected type ('string', 'number', 'array', 'boolean')
     * @returns {boolean} True if valid
     */
    function validateType(value, type) {
      if (value === null || value === undefined) {
        return false;
      }

      switch (type) {
        case 'string':
          return typeof value === 'string';
        case 'number':
          return typeof value === 'number' && !isNaN(value);
        case 'array':
          return Array.isArray(value);
        case 'boolean':
          return typeof value === 'boolean';
        default:
          return false;
      }
    }

    /**
     * Validates a skill object against the skill schema
     * @param {Object} skill - Skill object to validate
     * @returns {Object} Validation result { valid: boolean, errors: string[] }
     */
    function validateSkill(skill) {
      const errors = [];

      for (const [field, expectedType] of Object.entries(SKILL_SCHEMA)) {
        if (!skill.hasOwnProperty(field)) {
          errors.push(`Missing required field: ${field}`);
          continue;
        }

        if (!validateType(skill[field], expectedType)) {
          errors.push(`Field '${field}' must be of type ${expectedType}, got ${typeof skill[field]}`);
        }
      }

      // Additional validations
      if (skill.name && typeof skill.name === 'string' && skill.name.trim().length === 0) {
        errors.push('Field "name" cannot be empty');
      }

      if (skill.displayName && typeof skill.displayName === 'string' && skill.displayName.trim().length === 0) {
        errors.push('Field "displayName" cannot be empty');
      }

      if (skill.description && typeof skill.description === 'string' && skill.description.trim().length === 0) {
        errors.push('Field "description" cannot be empty');
      }

      if (skill.repoUrl && typeof skill.repoUrl === 'string') {
        const urlPattern = /^https?:\/\/.+/;
        if (!urlPattern.test(skill.repoUrl)) {
          errors.push('Field "repoUrl" must be a valid HTTP/HTTPS URL');
        }
      }

      if (skill.stars && typeof skill.stars === 'number' && skill.stars < 0) {
        errors.push('Field "stars" must be a non-negative number');
      }

      if (skill.color && typeof skill.color === 'string') {
        const hexPattern = /^#[0-9A-Fa-f]{6}$/;
        if (!hexPattern.test(skill.color)) {
          errors.push('Field "color" must be a valid hex color (e.g., #FFFFFF)');
        }
      }

      if (skill.lastUpdated && typeof skill.lastUpdated === 'string') {
        const date = new Date(skill.lastUpdated);
        if (isNaN(date.getTime())) {
          errors.push('Field "lastUpdated" must be a valid ISO 8601 date string');
        }
      }

      // Validate arrays have correct content types
      if (skill.domains && Array.isArray(skill.domains)) {
        if (skill.domains.length === 0) {
          errors.push('Field "domains" must contain at least one domain');
        }
        skill.domains.forEach((domain, index) => {
          if (typeof domain !== 'string') {
            errors.push(`Field "domains[${index}]" must be a string`);
          }
        });
      }

      if (skill.tags && Array.isArray(skill.tags)) {
        skill.tags.forEach((tag, index) => {
          if (typeof tag !== 'string') {
            errors.push(`Field "tags[${index}]" must be a string`);
          }
        });
      }

      if (skill.intentKeywords && Array.isArray(skill.intentKeywords)) {
        if (skill.intentKeywords.length === 0) {
          errors.push('Field "intentKeywords" must contain at least one keyword');
        }
        skill.intentKeywords.forEach((keyword, index) => {
          if (typeof keyword !== 'string') {
            errors.push(`Field "intentKeywords[${index}]" must be a string`);
          }
        });
      }

      return {
        valid: errors.length === 0,
        errors
      };
    }

    /**
     * Validates the catalog object against the catalog schema
     * @param {Object} catalog - Catalog object to validate
     * @returns {Object} Validation result { valid: boolean, errors: string[] }
     */
    export function validateCatalog(catalog) {
      const errors = [];

      // Validate top-level fields
      for (const [field, expectedType] of Object.entries(CATALOG_SCHEMA)) {
        if (!catalog.hasOwnProperty(field)) {
          errors.push(`Missing required field: ${field}`);
          continue;
        }

        if (!validateType(catalog[field], expectedType)) {
          errors.push(`Field '${field}' must be of type ${expectedType}, got ${typeof catalog[field]}`);
        }
      }

      // Validate version format
      if (catalog.version && typeof catalog.version === 'string') {
        const versionPattern = /^\d+\.\d+\.\d+$/;
        if (!versionPattern.test(catalog.version)) {
          errors.push('Field "version" must be in semantic version format (e.g., 1.0.0)');
        }
      }

      // Validate skills array
      if (catalog.skills && Array.isArray(catalog.skills)) {
        if (catalog.skills.length === 0) {
          errors.push('Field "skills" must contain at least one skill');
        }

        catalog.skills.forEach((skill, index) => {
          if (typeof skill !== 'object' || skill === null) {
            errors.push(`Skill at index ${index} must be an object`);
            return;
          }

          const skillValidation = validateSkill(skill);
          if (!skillValidation.valid) {
            skillValidation.errors.forEach(err => {
              errors.push(`Skill[${index}]: ${err}`);
            });
          }
        });

        // Check for duplicate skill names
        const skillNames = catalog.skills.map(s => s.name);
        const duplicates = skillNames.filter((name, index) => skillNames.indexOf(name) !== index);
        if (duplicates.length > 0) {
          errors.push(`Duplicate skill names found: ${[...new Set(duplicates)].join(', ')}`);
        }
      }

      return {
        valid: errors.length === 0,
        errors
      };
    }

    /**
     * Loads the catalog from the specified or default path
     * @param {string} catalogPath - Optional path to catalog.json file
     * @returns {Promise<Object>} Catalog object with skills array
     * @throws {Error} If file doesn't exist or is invalid
     */
    export async function loadCatalog(catalogPath = DEFAULT_CATALOG_PATH) {
      try {
        const exists = await fs.pathExists(catalogPath);
        if (!exists) {
          throw new Error(`Catalog file not found at: ${catalogPath}`);
        }

        const content = await fs.readJson(catalogPath);

        // Validate catalog structure
        const validation = validateCatalog(content);
        if (!validation.valid) {
          const errorMessages = validation.errors.map(err => `  - ${err}`).join('\n');
          throw new Error(`Catalog validation failed:\n${errorMessages}`);
        }

        return content;
      } catch (error) {
        if (error.message.includes('Catalog validation failed') || error.message.includes('Catalog file not found')) {
          throw error;
        }
        throw new Error(`Failed to load catalog from ${catalogPath}: ${error.message}`);
      }
    }

    /**
     * Searches the catalog for skills matching the query
     * Searches across name, displayName, description, tags, and intentKeywords
     * @param {Object|string} query - Search query object or string
     * @param {Object} options - Search options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @param {boolean} options.caseSensitive - Whether search is case sensitive (default: false)
     * @param {number} options.limit - Maximum number of results to return (default: no limit)
     * @returns {Promise<Array>} Array of matching skills
     */
    export async function searchCatalog(query, options = {}) {
      const {
        catalogPath = DEFAULT_CATALOG_PATH,
        caseSensitive = false,
        limit = Infinity
      } = options;

      const catalog = await loadCatalog(catalogPath);
      let skills = [...catalog.skills];

      // Handle string query
      if (typeof query === 'string') {
        const searchTerm = caseSensitive ? query : query.toLowerCase();

        skills = skills.filter(skill => {
          const name = caseSensitive ? skill.name : skill.name.toLowerCase();
          const displayName = caseSensitive ? skill.displayName : skill.displayName.toLowerCase();
          const description = caseSensitive ? skill.description : skill.description.toLowerCase();
          const tags = skill.tags.map(t => caseSensitive ? t : t.toLowerCase()).join(' ');
          const keywords = skill.intentKeywords.map(k => caseSensitive ? k : k.toLowerCase()).join(' ');

          return (
            name.includes(searchTerm) ||
            displayName.includes(searchTerm) ||
            description.includes(searchTerm) ||
            tags.includes(searchTerm) ||
            keywords.includes(searchTerm)
          );
        });
      }
      // Handle object query with filters
      else if (typeof query === 'object' && query !== null) {
        if (query.name) {
          const term = caseSensitive ? query.name : query.name.toLowerCase();
          skills = skills.filter(s => {
            const name = caseSensitive ? s.name : s.name.toLowerCase();
            return name.includes(term);
          });
        }

        if (query.displayName) {
          const term = caseSensitive ? query.displayName : query.displayName.toLowerCase();
          skills = skills.filter(s => {
            const displayName = caseSensitive ? s.displayName : s.displayName.toLowerCase();
            return displayName.includes(term);
          });
        }

        if (query.description) {
          const term = caseSensitive ? query.description : query.description.toLowerCase();
          skills = skills.filter(s => {
            const description = caseSensitive ? s.description : s.description.toLowerCase();
            return description.includes(term);
          });
        }

        if (query.tag) {
          const term = caseSensitive ? query.tag : query.tag.toLowerCase();
          skills = skills.filter(s =>
            s.tags.some(t => {
              const tag = caseSensitive ? t : t.toLowerCase();
              return tag.includes(term);
            })
          );
        }

        if (query.keyword) {
          const term = caseSensitive ? query.keyword : query.keyword.toLowerCase();
          skills = skills.filter(s =>
            s.intentKeywords.some(k => {
              const keyword = caseSensitive ? k : k.toLowerCase();
              return keyword.includes(term);
            })
          );
        }

        if (query.author) {
          const term = caseSensitive ? query.author : query.author.toLowerCase();
          skills = skills.filter(s => {
            const author = caseSensitive ? s.author : s.author.toLowerCase();
            return author.includes(term);
          });
        }

        if (query.minStars !== undefined) {
          skills = skills.filter(s => s.stars >= query.minStars);
        }

        if (query.maxStars !== undefined) {
          skills = skills.filter(s => s.stars <= query.maxStars);
        }

        if (query.updatedAfter) {
          const afterDate = new Date(query.updatedAfter);
          skills = skills.filter(s => new Date(s.lastUpdated) > afterDate);
        }

        if (query.updatedBefore) {
          const beforeDate = new Date(query.updatedBefore);
          skills = skills.filter(s => new Date(s.lastUpdated) < beforeDate);
        }
      }

      // Apply limit
      if (limit < skills.length) {
        skills = skills.slice(0, limit);
      }

      return skills;
    }

    /**
     * Filters catalog skills by domain(s)
     * @param {string|Array<string>} domains - Single domain or array of domains
     * @param {Object} options - Filter options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @param {boolean} options.matchAll - If true, skill must match ALL domains (default: false)
     * @returns {Promise<Array>} Array of skills matching the domain filter
     */
    export async function filterByDomain(domains, options = {}) {
      const {
        catalogPath = DEFAULT_CATALOG_PATH,
        matchAll = false
      } = options;

      const catalog = await loadCatalog(catalogPath);
      const domainList = Array.isArray(domains) ? domains : [domains];
      const normalizedDomains = domainList.map(d => d.toLowerCase());

      return catalog.skills.filter(skill => {
        const skillDomains = skill.domains.map(d => d.toLowerCase());

        if (matchAll) {
          // Skill must have ALL specified domains
          return normalizedDomains.every(d => skillDomains.includes(d));
        } else {
          // Skill must have AT LEAST ONE of the specified domains
          return normalizedDomains.some(d => skillDomains.includes(d));
        }
      });
    }

    /**
     * Gets a skill by its repository URL
     * @param {string} url - Repository URL to search for
     * @param {Object} options - Search options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @returns {Promise<Object|undefined>} Skill object if found, undefined otherwise
     */
    export async function getSkillByUrl(url, options = {}) {
      const { catalogPath = DEFAULT_CATALOG_PATH } = options;

      const catalog = await loadCatalog(catalogPath);

      return catalog.skills.find(skill => {
        // Exact match first
        if (skill.repoUrl === url) {
          return true;
        }

        // Case-insensitive match
        if (skill.repoUrl.toLowerCase() === url.toLowerCase()) {
          return true;
        }

        // Check if it's a prefix match (for different branches/refs)
        const skillUrlLower = skill.repoUrl.toLowerCase();
        const searchUrlLower = url.toLowerCase();

        // Remove trailing slashes for comparison
        const normalizedSkillUrl = skillUrlLower.replace(/\/$/, '');
        const normalizedSearchUrl = searchUrlLower.replace(/\/$/, '');

        // Check if one is a substring of the other (for URL variations)
        return (
          normalizedSkillUrl.includes(normalizedSearchUrl) ||
          normalizedSearchUrl.includes(normalizedSkillUrl)
        );
      });
    }

    /**
     * Gets a skill by its name
     * @param {string} name - Skill name to search for
     * @param {Object} options - Search options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @returns {Promise<Object|undefined>} Skill object if found, undefined otherwise
     */
    export async function getSkillByName(name, options = {}) {
      const { catalogPath = DEFAULT_CATALOG_PATH } = options;

      const catalog = await loadCatalog(catalogPath);

      return catalog.skills.find(skill => skill.name === name);
    }

    /**
     * Gets all unique domains from the catalog
     * @param {Object} options - Options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @returns {Promise<Array<string>>} Array of unique domain names
     */
    export async function getDomains(options = {}) {
      const { catalogPath = DEFAULT_CATALOG_PATH } = options;

      const catalog = await loadCatalog(catalogPath);
      const allDomains = catalog.skills.flatMap(skill => skill.domains);

      return [...new Set(allDomains)].sort();
    }

    /**
     * Gets all unique tags from the catalog
     * @param {Object} options - Options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @returns {Promise<Array<string>>} Array of unique tag names
     */
    export async function getTags(options = {}) {
      const { catalogPath = DEFAULT_CATALOG_PATH } = options;

      const catalog = await loadCatalog(catalogPath);
      const allTags = catalog.skills.flatMap(skill => skill.tags);

      return [...new Set(allTags)].sort();
    }

    /**
     * Gets skills sorted by star count
     * @param {Object} options - Options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @param {string} options.order - 'asc' or 'desc' (default: 'desc')
     * @param {number} options.limit - Maximum number of skills to return (default: no limit)
     * @returns {Promise<Array>} Array of skills sorted by stars
     */
    export async function getSkillsByStars(options = {}) {
      const {
        catalogPath = DEFAULT_CATALOG_PATH,
        order = 'desc',
        limit = Infinity
      } = options;

      const catalog = await loadCatalog(catalogPath);
      const sortedSkills = [...catalog.skills].sort((a, b) => {
        return order === 'desc' ? b.stars - a.stars : a.stars - b.stars;
      });

      return limit < sortedSkills.length ? sortedSkills.slice(0, limit) : sortedSkills;
    }

    /**
     * Gets skills that provide a specific capability
     * @param {string} capability - Capability to search for
     * @param {Object} options - Options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @returns {Promise<Array>} Array of skills that provide the capability
     */
    export async function getSkillsByCapability(capability, options = {}) {
      const { catalogPath = DEFAULT_CATALOG_PATH } = options;

      const catalog = await loadCatalog(catalogPath);

      return catalog.skills.filter(skill =>
        skill.provides.some(p => p.toLowerCase().includes(capability.toLowerCase()))
      );
    }

    /**
     * Gets skills that require a specific dependency
     * @param {string} dependency - Dependency to search for
     * @param {Object} options - Options
     * @param {string} options.catalogPath - Path to catalog file (optional)
     * @returns {Promise<Array>} Array of skills that require the dependency
     */
    export async function getSkillsByDependency(dependency, options = {}) {
      const { catalogPath = DEFAULT_CATALOG_PATH } = options;

      const catalog = await loadCatalog(catalogPath);

      return catalog.skills.filter(skill =>
        skill.requires.some(r => r.toLowerCase().includes(dependency.toLowerCase()))
      );
    }

    /**
     * Validates a catalog file without loading it
     * @param {string} catalogPath - Path to catalog file
     * @returns {Promise<Object>} Validation result { valid: boolean, errors: string[] }
     */
    export async function validateCatalogFile(catalogPath = DEFAULT_CATALOG_PATH) {
      try {
        const exists = await fs.pathExists(catalogPath);
        if (!exists) {
          return {
            valid: false,
            errors: [`Catalog file not found at: ${catalogPath}`]
          };
        }

        const content = await fs.readJson(catalogPath);
        return validateCatalog(content);
      } catch (error) {
        return {
          valid: false,
          errors: [`Failed to read catalog file: ${error.message}`]
        };
      }
    }