zig-pay/src/endpoints/payments.zig

const endpoints = @import("endpoints.zig");

const EndpointsManager = endpoints.EndpointsManager;
const Request = endpoints.Request;
const Response = endpoints.Response;

const data = @import("data");
const Payment = data.payments.Payment;
const PaymentsRepository = data.payments.PaymentsRepository;

const std = @import("std");
const ctx = @import("context");
const parses = @import("parses");
const PropertySpec = @import("parses").PropertySpec;
const DateTime = @import("things").DateTime;

pub fn registerEndpoints(get_endpoints: *EndpointsManager, post_endpoints: *EndpointsManager) !void {
    // GET
    try get_endpoints.add("/payments-summary", getSummary);
    try get_endpoints.add("/payments/*", getPaymentsById);

    // POST
    try post_endpoints.add("/payments", postPayments);
}

fn postPayments(req: *Request, res: *Response) void {
    if (ctx.server_settings.failure)
        return res.withStatus(.service_unavailable).end();

    if (ctx.server_settings.delay > 0) {
        std.time.sleep(ctx.server_settings.delay * std.time.ns_per_ms);
    }

    res.withStatus(.unprocessable_entity).withContentType(.json).end();

    var prop_correlationId = parses.PropertySpec{ .name = "correlationId" };
    var prop_amount = parses.PropertySpec{ .name = "amount" };

    parses.json(req.body, .{ .properties = &.{ &prop_correlationId, &prop_amount } }) catch {
        return;
    };

    const payment = Payment{ .id = prop_correlationId.asUuid() catch {
        return res.withContent("{ \"correlationId\" : \"invalid\" }").end();
    }, .amount = prop_amount.asFloat(f64) catch {
        return res.withContent("{ \"amount\" : \"invalid\" }").end();
    }, .requested_at = DateTime.now() };

    ctx.payments_repository.insert(payment) catch {
        return res.withStatus(.internal_server_error).end();
    };

    res.withStatus(.created).withContent("confia que vai ser integrado.").withContentType(.html).end();
}

fn getPaymentsById(req: *Request, res: *Response) void {
    if (ctx.server_settings.failure)
        return res.withStatus(.service_unavailable).end();

    if (ctx.server_settings.delay > 0) {
        std.time.sleep(ctx.server_settings.delay * std.time.ns_per_ms);
    }

    const template_json_res: []const u8 =
        \\{{
        \\  "correlationId": "{s}",
        \\  "amount": {d:.2},
        \\  "requestedAt" : "{s}",
        \\  "integration_status" : "{s}"
        \\}}
    ;

    res.withStatus(.not_found).end();

    if (req.path.len < 36) {
        return;
    }

    const id = req.path[req.path.len - 36 ..];

    const payment = ctx.payments_repository.findById(id);

    if (payment == null) return;

    const dateIso = payment.?.requested_at.toIso();

    res.withContentFormat(template_json_res, .{ payment.?.id, payment.?.amount, dateIso, payment.?.getIntegrationStatus() }) catch {
        return res.withStatus(.internal_server_error).end();
    };

    res.withStatus(.ok).withContentType(.json).end();
}

const template_json_summary: []const u8 =
    \\{{
    \\  "default": {{ "totalRequests": "{d}", "totalAmount": {d:.2} }},
    \\  "fallback": {{ "totalRequests": "{d}", "totalAmount": {d:.2} }}
    \\}}
;

fn getSummary(req: *Request, res: *Response) void {
    var from: ?DateTime = null;
    var to: ?DateTime = null;

    var prop_from = PropertySpec{ .name = "from" };
    var prop_to = PropertySpec{ .name = "to" };
    parses.url_params(req.query, .{ .properties = &.{ &prop_from, &prop_to } });

    if (prop_from.value_dirty != null)
        from = prop_from.asDateTime() catch {
            return res.withStatus(.bad_request).withContent("query param 'from' is invalid").withContentType(.html).end();
        };

    if (prop_to.value_dirty != null)
        to = prop_to.asDateTime() catch {
            return res.withStatus(.bad_request).withContent("query param 'to' is invalid").withContentType(.html).end();
        };

    var summary = ctx.payments_repository.integrationSummary(from, to);

    const cousin_summary = ctx.summary_exchange.receive(from, to);
    summary.default_total_payments_processed += cousin_summary.default_total_payments_processed;
    summary.default_total_value += cousin_summary.default_total_value;
    summary.fallback_total_payments_processed += cousin_summary.fallback_total_payments_processed;
    summary.fallback_total_value += cousin_summary.fallback_total_value;

    res.withStatus(.ok).withContentType(.json).withContentFormat(template_json_summary, .{
        summary.default_total_payments_processed,
        summary.default_total_value,
        summary.fallback_total_payments_processed,
        summary.fallback_total_value,
    }) catch {
        return res.withStatus(.internal_server_error).withContentType(.none).end();
    };
}