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This commit is contained in:
mats
2026-06-28 17:51:52 +02:00
parent 7db0d236c7
commit aa8b2bdedc
84 changed files with 4328 additions and 2344 deletions
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pkg/promotions/mcp/public.go
+29 -27
View File
@@ -1,11 +1,13 @@
package mcp
import (
"context"
"encoding/json"
"fmt"
"time"
"git.k6n.net/mats/go-cart-actor/pkg/promotions"
pmcp "git.k6n.net/mats/platform/mcp"
)
// NewPublic builds an MCP server exposing only the read-only promotion tools:
@@ -17,23 +19,23 @@ func NewPublic(store *promotions.Store, eval *promotions.PromotionService) *Serv
eval = promotions.NewPromotionService(nil)
}
s := &Server{store: store, eval: eval}
s.tools = s.buildPublicTools()
s.mcp = pmcp.NewServer(pmcp.Info{Name: serverName, Version: serverVersion}, s.buildPublicTools()...)
return s
}
func (s *Server) buildPublicTools() []tool {
return []tool{
func (s *Server) buildPublicTools() []pmcp.Tool {
return []pmcp.Tool{
{
Name: "list_promotions",
Description: "List all promotion rules the cart engine evaluates, optionally filtered by status (active|inactive|scheduled|expired).",
InputSchema: object(props{
"status": str("optional status filter: active|inactive|scheduled|expired"),
InputSchema: pmcp.Object(pmcp.Props{
"status": pmcp.String("optional status filter: active|inactive|scheduled|expired"),
}, nil),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(_ context.Context, args json.RawMessage) (any, error) {
var a struct {
Status string `json:"status"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
rules := s.store.List()
@@ -52,12 +54,12 @@ func (s *Server) buildPublicTools() []tool {
{
Name: "get_promotion",
Description: "Fetch a single promotion rule by id.",
InputSchema: object(props{"id": str("the promotion id")}, []string{"id"}),
invoke: func(args json.RawMessage) (any, error) {
InputSchema: pmcp.Object(pmcp.Props{"id": pmcp.String("the promotion id")}, []string{"id"}),
Invoke: func(_ context.Context, args json.RawMessage) (any, error) {
var a struct {
ID string `json:"id"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
r, ok := s.store.Get(a.ID)
@@ -72,18 +74,18 @@ func (s *Server) buildPublicTools() []tool {
Description: "Evaluate the current active promotions against a hypothetical cart total and report the " +
"matched discount. cartTotalIncVat is in öre incl. VAT (e.g. 5 000 000 = 50 000 kr). Useful for " +
"verifying Volymrabatt tiers without touching a real cart.",
InputSchema: object(props{
"cartTotalIncVat": integer("cart total incl. VAT, in öre"),
"itemQuantity": integer("optional total item quantity"),
"customerSegment": str("optional customer segment"),
InputSchema: pmcp.Object(pmcp.Props{
"cartTotalIncVat": pmcp.Integer("cart total incl. VAT, in öre"),
"itemQuantity": pmcp.Integer("optional total item quantity"),
"customerSegment": pmcp.String("optional customer segment"),
}, []string{"cartTotalIncVat"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(_ context.Context, args json.RawMessage) (any, error) {
var a struct {
CartTotalIncVat int64 `json:"cartTotalIncVat"`
ItemQuantity int `json:"itemQuantity"`
CustomerSegment string `json:"customerSegment"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
g := syntheticCart(a.CartTotalIncVat, a.ItemQuantity, s.defaultVatRate())
@@ -109,20 +111,20 @@ func (s *Server) buildPublicTools() []tool {
"which promotions match, what discount they apply, and any pending next-tier nudges (\"spend X more for Y%\"). " +
"When promotionId is set, only that specific promotion is evaluated (useful for testing a new rule). " +
"When omitted, all active promotions are evaluated. cartTotalIncVat is in öre incl. VAT.",
InputSchema: object(props{
"cartTotalIncVat": integer("cart total incl. VAT, in öre"),
"promotionId": str("optional: evaluate only this promotion (by id)"),
"itemQuantity": integer("optional total item quantity"),
"customerSegment": str("optional customer segment"),
InputSchema: pmcp.Object(pmcp.Props{
"cartTotalIncVat": pmcp.Integer("cart total incl. VAT, in öre"),
"promotionId": pmcp.String("optional: evaluate only this promotion (by id)"),
"itemQuantity": pmcp.Integer("optional total item quantity"),
"customerSegment": pmcp.String("optional customer segment"),
}, []string{"cartTotalIncVat"}),
invoke: func(args json.RawMessage) (any, error) {
Invoke: func(_ context.Context, args json.RawMessage) (any, error) {
var a struct {
CartTotalIncVat int64 `json:"cartTotalIncVat"`
PromotionId string `json:"promotionId"`
ItemQuantity int `json:"itemQuantity"`
CustomerSegment string `json:"customerSegment"`
}
if err := decode(args, &a); err != nil {
if err := pmcp.Decode(args, &a); err != nil {
return nil, err
}
@@ -151,10 +153,10 @@ func (s *Server) buildPublicTools() []tool {
evalResults := make([]map[string]any, 0, len(results))
for _, r := range results {
evalResults = append(evalResults, map[string]any{
"ruleId": r.Rule.ID,
"name": r.Rule.Name,
"applicable": r.Applicable,
"failedReason": r.FailedReason,
"ruleId": r.Rule.ID,
"name": r.Rule.Name,
"applicable": r.Applicable,
"failedReason": r.FailedReason,
"matchedActions": r.MatchedActions,
})
}