get_theme_example

Instructions

Implementation Reference

• src/index.ts:520-582 (handler)

  Handler function for the get_theme_example tool. It takes theme_name, attempts exact match with getExampleContent, falls back to fuzzy match using findClosestMatch, and returns the code content or error message.

  async ({ theme_name }) => {
    if (!theme_name) {
      return {
        content: [
          {
            type: "text",
            text: "Theme name not specified",
          },
        ],
      };
    }
    
    try {
      // First try exact match
      const result = getExampleContent("theme", theme_name);
      
      if (result.error) {
        // Try to find by fuzzy match
        const themesDir = path.join(CODE_EXAMPLES_DIR, "react-native", "theme");
        const closestMatch = findClosestMatch(themesDir, theme_name);
        
        if (closestMatch) {
          const fuzzyResult = getExampleContent("theme", closestMatch);
          return {
            content: [
              {
                type: "text",
                text: fuzzyResult.content?.[0] ?? fuzzyResult.error ?? "Error: No content available",
              },
            ],
          };
        } else {
          return {
            content: [
              {
                type: "text",
                text: `Theme ${theme_name} not found`,
              },
            ],
          };
        }
      }
      
      return {
        content: [
          {
            type: "text",
            text: result.content?.[0] ?? result.error ?? "Error: No content available",
          },
        ],
      };
    } catch (err) {
      console.error(`Error getting theme example ${theme_name}:`, err);
      return {
        content: [
          {
            type: "text",
            text: `Error getting theme example: ${err}`,
          },
        ],
      };
    }
  },

• src/index.ts:517-519 (schema)

  Zod schema defining the input parameter theme_name as a required string.

  {
    theme_name: z.string().describe("Theme Name"),
  },

• src/index.ts:514-583 (registration)

  Registration of the get_theme_example tool on the MCP server with name, description, schema, and inline handler function.

  server.tool(
    "get_theme_example",
    "Get code for a React Native theme",
    {
      theme_name: z.string().describe("Theme Name"),
    },
    async ({ theme_name }) => {
      if (!theme_name) {
        return {
          content: [
            {
              type: "text",
              text: "Theme name not specified",
            },
          ],
        };
      }
      
      try {
        // First try exact match
        const result = getExampleContent("theme", theme_name);
        
        if (result.error) {
          // Try to find by fuzzy match
          const themesDir = path.join(CODE_EXAMPLES_DIR, "react-native", "theme");
          const closestMatch = findClosestMatch(themesDir, theme_name);
          
          if (closestMatch) {
            const fuzzyResult = getExampleContent("theme", closestMatch);
            return {
              content: [
                {
                  type: "text",
                  text: fuzzyResult.content?.[0] ?? fuzzyResult.error ?? "Error: No content available",
                },
              ],
            };
          } else {
            return {
              content: [
                {
                  type: "text",
                  text: `Theme ${theme_name} not found`,
                },
              ],
            };
          }
        }
        
        return {
          content: [
            {
              type: "text",
              text: result.content?.[0] ?? result.error ?? "Error: No content available",
            },
          ],
        };
      } catch (err) {
        console.error(`Error getting theme example ${theme_name}:`, err);
        return {
          content: [
            {
              type: "text",
              text: `Error getting theme example: ${err}`,
            },
          ],
        };
      }
    },
  );

• src/index.ts:65-84 (helper)

  Shared helper function to retrieve code content from example files in the specified subcategory directory (e.g., 'theme'), used by get_theme_example and other example tools.

  function getExampleContent(subcategory: string, filename: string): { content?: string[]; path?: string; error?: string } {
    const searchDir = path.join(CODE_EXAMPLES_DIR, "react-native", subcategory);
    
    const filePath = findFileInSubdirectories(searchDir, filename);
    
    if (!filePath || !fs.existsSync(filePath)) {
      return { error: `Example ${filename} not found` };
    }
    
    try {
      const content = fs.readFileSync(filePath, 'utf8');
      return {
        content: [content],
        path: path.relative(BASE_DIR, filePath)
      };
    } catch (err) {
      console.error(`Error reading example ${filename}:`, err);
      return { error: `Error reading example ${filename}` };
    }
  }

• src/index.ts:87-109 (helper)

  Shared helper function that performs fuzzy matching to find the closest filename containing the search term in a directory, used for fallback in get_theme_example.

  function findClosestMatch(directory: string, searchName: string, extensions: string[] = ['.js', '.jsx', '.ts', '.tsx']) {
    if (!fs.existsSync(directory)) return null;
    
    let closestMatch = null;
    
    for (const ext of extensions) {
      const files = glob.sync(`${directory}/**/*${ext}`);
      
      for (const filePath of files) {
        const fileName = path.basename(filePath);
        const fileNameNoExt = path.basename(fileName, path.extname(fileName));
        
        if (fileNameNoExt.toLowerCase().includes(searchName.toLowerCase())) {
          closestMatch = fileNameNoExt;
          break;
        }
      }
      
      if (closestMatch) break;
    }
    
    return closestMatch;
  }