Mats Törnberg
ee5f54f0dd
Co-authored-by: matst80 <mats.tornberg@gmail.com> Reviewed-on: #8 Co-authored-by: Mats Törnberg <mats@tornberg.me> Co-committed-by: Mats Törnberg <mats@tornberg.me>
45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package checkout
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import (
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"encoding/json"
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"fmt"
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messages "git.k6n.net/go-cart-actor/proto/checkout"
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)
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// mutation_initialize_checkout.go
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//
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// Registers the InitializeCheckout mutation.
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// This mutation is invoked AFTER an external checkout session
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// has been successfully created or updated. It persists the
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// order reference / status and marks the checkout as having a payment in progress.
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//
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// Behavior:
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// - Sets OrderId to the order ID.
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// - Sets Status to the current status.
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// - Sets PaymentInProgress flag.
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// - Assumes inventory is already reserved.
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//
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// Validation:
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// - Returns an error if payload is nil.
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// - Returns an error if orderId is empty.
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func HandleInitializeCheckout(g *CheckoutGrain, m *messages.InitializeCheckout) error {
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if m == nil {
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return fmt.Errorf("InitializeCheckout: nil payload")
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}
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if m.OrderId == "" {
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return fmt.Errorf("InitializeCheckout: missing orderId")
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}
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if m.CartState != nil {
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return fmt.Errorf("InitializeCheckout: checkout already initialized")
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}
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err := json.Unmarshal(m.CartState.Value, &g.CartState)
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if err != nil {
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return fmt.Errorf("InitializeCheckout: failed to unmarshal cart state: %w", err)
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}
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return nil
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}
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