Initial LinkedSign platform

backend/src/utils/apiResponse.js

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+const sendSuccess = (res, data, statusCode = 200) => {
+  return res.status(statusCode).json({
+    success: true,
+    data,
+    error: null,
+  });
+};
+
+const sendError = (res, error, statusCode = 400) => {
+  return res.status(statusCode).json({
+    success: false,
+    data: null,
+    error,
+  });
+};
+
+module.exports = {
+  sendSuccess,
+  sendError,
+};

backend/src/utils/certificatePath.js

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+const fs = require('fs/promises');
+const path = require('path');
+
+const getUserCertificatePath = async (userId) => {
+  const fullPath = path.resolve(
+    '/home/mgonzalez/desarrollo/react/linkedsign/backend/storage/certificates/users',
+    String(userId)
+  );
+
+  await fs.mkdir(fullPath, { recursive: true });
+
+  return fullPath;
+};
+
+module.exports = {
+  getUserCertificatePath,
+};

backend/src/utils/jwt.js

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+const jwt = require('jsonwebtoken');
+const env = require('../config/env');
+
+const signAccess = (payload) => {
+  return jwt.sign(payload, env.jwt.secret, { expiresIn: env.jwt.accessExpires });
+};
+
+const signRefresh = (payload) => {
+  return jwt.sign(payload, env.jwt.secret, { expiresIn: env.jwt.refreshExpires });
+};
+
+const verify = (token) => {
+  return jwt.verify(token, env.jwt.secret);
+};
+
+module.exports = { signAccess, signRefresh, verify };

backend/src/utils/mockJwt.js

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+const toBase64Url = (value) => {
+  return Buffer.from(value)
+    .toString('base64')
+    .replace(/=/g, '')
+    .replace(/\+/g, '-')
+    .replace(/\//g, '_');
+};
+
+const createMockJwt = (payload = {}) => {
+  const header = {
+    alg: 'HS256',
+    typ: 'JWT',
+  };
+
+  const body = {
+    sub: payload.email || 'mock-user',
+    role: 'user',
+    iat: Math.floor(Date.now() / 1000),
+    mock: true,
+  };
+
+  return [
+    toBase64Url(JSON.stringify(header)),
+    toBase64Url(JSON.stringify(body)),
+    'mock-signature',
+  ].join('.');
+};
+
+module.exports = {
+  createMockJwt,
+};

backend/src/utils/storagePath.js

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+const fs = require('fs/promises');
+const path = require('path');
+const env = require('../config/env');
+
+const getDocumentPath = async () => {
+  const now = new Date();
+  const year = String(now.getFullYear());
+  const month = String(now.getMonth() + 1).padStart(2, '0');
+  const fullPath = path.join(env.storagePath, 'documents', year, month);
+  await fs.mkdir(fullPath, { recursive: true });
+  return fullPath;
+};
+
+const getSignedDocumentPath = async () => {
+  const now = new Date();
+  const year = String(now.getFullYear());
+  const month = String(now.getMonth() + 1).padStart(2, '0');
+  const fullPath = path.join(env.storagePath, 'signed', year, month);
+  await fs.mkdir(fullPath, { recursive: true });
+  return fullPath;
+};
+
+const getCertificatePath = async (userId) => {
+  const fullPath = path.join(env.storagePath, 'certificates', String(userId));
+  await fs.mkdir(fullPath, { recursive: true });
+  return fullPath;
+};
+
+module.exports = { getDocumentPath, getSignedDocumentPath, getCertificatePath };