arela/dist/generate/client/client-generator.js

AI-powered CTO with multi-agent orchestration, code summarization, visual testing (web + mobile) for blazing fast development.

/**
 * Generate HTTP client from OpenAPI spec
 */
export function generateClient(spec, serviceName, baseURL) {
    const className = `${serviceName}Client`;
    let output = `/**
 * Auto-generated API client from OpenAPI spec
 * DO NOT EDIT - This file is generated by Arela
 * @see https://axios-http.com
 */

import axios, { AxiosInstance, AxiosRequestConfig } from 'axios';
import * as types from './types';
import * as schemas from './schemas';

export interface ${className}Config {
  baseURL: string;
  token?: string;
  timeout?: number;
}

export class ${className} {
  private client: AxiosInstance;

  constructor(config: ${className}Config) {
    this.client = axios.create({
      baseURL: config.baseURL,
      timeout: config.timeout || 30000,
      headers: {
        'Content-Type': 'application/json',
        ...(config.token && { Authorization: \`Bearer \${config.token}\` }),
      },
    });
  }

`;
    // Generate methods for each endpoint
    const methods = [];
    for (const [path, pathItem] of Object.entries(spec.paths)) {
        if (typeof pathItem !== 'object')
            continue;
        for (const [method, operation] of Object.entries(pathItem)) {
            if (!operation || typeof operation !== 'object')
                continue;
            if (method === 'parameters')
                continue; // Skip parameters key
            const methodCode = generateMethod(path, method, operation);
            if (methodCode)
                methods.push(methodCode);
        }
    }
    output += methods.join('\n\n');
    output += '\n}\n';
    return output;
}
function generateMethod(path, method, operation) {
    const methodName = generateMethodName(path, method, operation);
    const pathParams = extractPathParams(path);
    const queryParams = (operation.parameters || []).filter((p) => p.in === 'query');
    const hasBody = ['post', 'put', 'patch'].includes(method.toLowerCase());
    // Build parameter list
    const params = [];
    // Add path parameters
    for (const param of pathParams) {
        params.push(`${param}: string | number`);
    }
    // Add body parameter
    if (hasBody) {
        params.push('data?: any');
    }
    // Add query parameters
    if (queryParams.length > 0) {
        params.push('params?: Record<string, any>');
    }
    // Add config parameter
    params.push('config?: AxiosRequestConfig');
    const parametersStr = params.join(', ');
    const methodUpper = method.toUpperCase();
    // Build URL
    const urlTemplate = path.replace(/{([^}]+)}/g, '${$1}');
    const urlExpr = `\`${urlTemplate}\``;
    // Build axios call
    let axiosCall = '';
    const configParts = [];
    if (queryParams.length > 0) {
        configParts.push('params');
    }
    configParts.push('...config');
    const configStr = configParts.length > 0 ? `, { ${configParts.join(', ')} }` : '';
    if (hasBody) {
        axiosCall = `this.client.${method.toLowerCase()}(${urlExpr}, data${configStr})`;
    }
    else {
        axiosCall = `this.client.${method.toLowerCase()}(${urlExpr}${configStr})`;
    }
    // Build return type
    const returnType = getReturnType(operation);
    const methodCode = `  /**
   * ${operation.summary || operation.description || `${methodUpper} ${path}`}
   */
  async ${methodName}(${parametersStr}): Promise<${returnType}> {
    const response = await ${axiosCall};
    return response.data;
  }`;
    return methodCode;
}
function generateMethodName(path, method, operation) {
    if (operation.operationId) {
        return camelCase(operation.operationId);
    }
    const parts = path.split('/').filter((p) => p && !p.startsWith('{'));
    const resource = parts[parts.length - 1] || 'resource';
    const action = getActionFromMethod(method);
    return `${action}${capitalize(singularize(resource))}`;
}
function getReturnType(operation) {
    const responses = operation.responses || {};
    // Try to find successful response
    const successCodes = ['200', '201'];
    for (const code of successCodes) {
        if (responses[code]) {
            return 'any'; // Simplified - could be enhanced with actual type extraction
        }
    }
    return 'any';
}
function extractPathParams(path) {
    const matches = path.match(/{([^}]+)}/g);
    return matches ? matches.map((m) => m.slice(1, -1)) : [];
}
function getActionFromMethod(method) {
    const m = method.toLowerCase();
    switch (m) {
        case 'get':
            return 'get';
        case 'post':
            return 'create';
        case 'put':
            return 'update';
        case 'patch':
            return 'patch';
        case 'delete':
            return 'delete';
        default:
            return 'call';
    }
}
function singularize(word) {
    if (word.endsWith('ies'))
        return word.slice(0, -3) + 'y';
    if (word.endsWith('es'))
        return word.slice(0, -2);
    if (word.endsWith('s'))
        return word.slice(0, -1);
    return word;
}
function capitalize(str) {
    return str.charAt(0).toUpperCase() + str.slice(1);
}
function camelCase(str) {
    return str
        .replace(/(?:^\w|[A-Z]|\b\w)/g, (word, index) => (index === 0 ? word.toLowerCase() : word.toUpperCase()))
        .replace(/\s+/g, '');
}
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