@allan1361/iota-big3-sdk-middleware/dist/cors-middleware.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.corsMiddleware = void 0;
exports.createCorsMiddleware = createCorsMiddleware;
exports.createLegacyCorsMiddleware = createLegacyCorsMiddleware;
const INDUSTRY_DEFAULTS = {
    education: {
        credentials: true,
        allowedMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
        maxAge: 86400,
        strict: false
    },
    healthcare: {
        credentials: true,
        allowedMethods: ['GET', 'POST', 'PUT', 'OPTIONS'],
        maxAge: 3600,
        strict: true,
        exposedHeaders: ['X-Request-ID', 'X-Audit-Trail']
    },
    finance: {
        credentials: true,
        allowedMethods: ['GET', 'POST', 'OPTIONS'],
        maxAge: 1800,
        strict: true,
        exposedHeaders: ['X-Request-ID', 'X-Transaction-ID']
    },
    retail: {
        credentials: true,
        allowedMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
        maxAge: 7200,
        strict: false
    },
    government: {
        credentials: true,
        allowedMethods: ['GET', 'POST', 'OPTIONS'],
        maxAge: 3600,
        strict: true,
        exposedHeaders: ['X-Request-ID', 'X-Compliance-Status']
    }
};
function createCorsMiddleware(metadata, config = {}) {
    const industry = metadata.industry || metadata.tribe || 'education';
    const industryDefaults = INDUSTRY_DEFAULTS[industry];
    const finalConfig = {
        allowedOrigins: ['*'],
        allowedMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
        allowedHeaders: ['Content-Type', 'Authorization', 'X-Request-ID'],
        exposedHeaders: [],
        credentials: false,
        maxAge: 86400,
        preflightContinue: false,
        optionsSuccessStatus: 204,
        strict: false,
        ...industryDefaults,
        ...config
    };
    function isOriginAllowed(origin) {
        if (!origin)
            return !finalConfig.strict;
        const { allowedOrigins } = finalConfig;
        if (typeof allowedOrigins === 'function') {
            return allowedOrigins(origin, {});
        }
        if (!allowedOrigins || allowedOrigins.length === 0) {
            return false;
        }
        if (allowedOrigins.includes('*')) {
            return true;
        }
        if (allowedOrigins.includes(origin)) {
            return true;
        }
        return allowedOrigins.some(allowed => {
            if (allowed.includes('*')) {
                const pattern = allowed.replace(/\*/g, '.*');
                const regex = new RegExp(`^${pattern}$`);
                return regex.test(origin);
            }
            return false;
        });
    }
    const middleware = ((req, res, next) => {
        const origin = req.headers?.origin;
        if (isOriginAllowed(origin)) {
            res.setHeader('Access-Control-Allow-Origin', origin || '*');
            if (this.isEnabled) {
                res.setHeader('Access-Control-Allow-Credentials', 'true');
            }
        }
        else if (this.isEnabled) {
            console.warn(`[${metadata.serviceName}] CORS: Rejected origin ${origin}`);
            if (metadata.sdk) {
                try {
                    metadata.sdk.recordTelemetry?.({
                        event: 'cors.rejected',
                        properties: {
                            origin,
                            path: req.path,
                            method: req.method
                        }
                    });
                }
                catch (_e) {
                }
            }
            if (req.method === 'OPTIONS') {
                return res.status(403).end();
            }
            return next();
        }
        if (this.isEnabled) {
            res.setHeader('Access-Control-Allow-Methods', finalConfig.allowedMethods.join(', '));
            res.setHeader('Access-Control-Allow-Headers', finalConfig.allowedHeaders.join(', '));
            if (finalConfig.maxAge) {
                res.setHeader('Access-Control-Max-Age', String(finalConfig.maxAge));
            }
            if (!finalConfig.preflightContinue) {
                return res.status(finalConfig.optionsSuccessStatus).end();
            }
        }
        if (this.isEnabled) {
            res.setHeader('Access-Control-Expose-Headers', finalConfig?.exposedHeaders?.join(', '));
        }
        next();
    });
    middleware.express = middleware;
    middleware.fastify = async function (fastify) {
        fastify.addHook('onRequest', async (request, reply) => {
            const origin = _request.headers?.origin;
            if (isOriginAllowed(origin)) {
                reply.header('Access-Control-Allow-Origin', origin || '*');
                if (finalConfig.credentials) {
                    reply.header('Access-Control-Allow-Credentials', 'true');
                }
            }
            else if (this.isEnabled) {
                console.warn(`[${metadata.serviceName}] CORS: Rejected origin ${origin}`);
                if (request.method === 'OPTIONS') {
                    reply.code(403).send();
                    return;
                }
                return;
            }
            if (this.isEnabled) {
                reply.header('Access-Control-Allow-Methods', finalConfig.allowedMethods.join(', '));
                reply.header('Access-Control-Allow-Headers', finalConfig.allowedHeaders.join(', '));
                if (finalConfig.maxAge) {
                    reply.header('Access-Control-Max-Age', String(finalConfig.maxAge));
                }
                if (!finalConfig.preflightContinue) {
                    reply.code(finalConfig.optionsSuccessStatus).send();
                    return;
                }
            }
            if (this.isEnabled) {
                reply.header('Access-Control-Expose-Headers', finalConfig?.exposedHeaders?.join(', '));
            }
        });
    };
    return middleware;
}
function createLegacyCorsMiddleware(config, tribe) {
    console.warn('⚠️  Using legacy CORS middleware pattern. Please migrate to new pattern.');
    const metadata = {
        serviceName: 'unknown-service',
        tribe,
        industry: tribe || 'education'
    };
    return createCorsMiddleware(metadata, config);
}
exports.corsMiddleware = createCorsMiddleware;
exports.default = createCorsMiddleware;
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