feat(iap/apple): 实现苹果IAP非续期订阅功能

新增苹果IAP相关接口与逻辑，包括产品列表查询、交易绑定、状态查询和恢复购买功能。移除旧的IAP验证逻辑，重构订阅系统以支持苹果IAP交易记录存储和权益计算。

- 新增/pkg/iap/apple包处理JWS解析和产品映射
- 实现GET /products、POST /attach、POST /restore和GET /status接口
- 新增apple_iap_transactions表存储交易记录
- 更新文档说明配置方式和接口规范
- 移除旧的AppleIAP验证和通知处理逻辑

pkg/iap/apple/errors.go

@@ -0,0 +1,6 @@
+package apple
+
+import "errors"
+
+var ErrInvalidJWS = errors.New("invalid jws")
+

pkg/iap/apple/jws.go

@@ -0,0 +1,55 @@
+package apple
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"strings"
+	"time"
+)
+
+func ParseTransactionJWS(jws string) (*TransactionPayload, error) {
+	parts := strings.Split(jws, ".")
+	if len(parts) != 3 {
+		return nil, ErrInvalidJWS
+	}
+	payloadB64 := parts[1]
+	// add padding if required
+	switch len(payloadB64) % 4 {
+	case 2:
+		payloadB64 += "=="
+	case 3:
+		payloadB64 += "="
+	}
+	data, err := base64.RawURLEncoding.DecodeString(payloadB64)
+	if err != nil {
+		return nil, err
+	}
+	var raw map[string]interface{}
+	if err = json.Unmarshal(data, &raw); err != nil {
+		return nil, err
+	}
+	var resp TransactionPayload
+	if v, ok := raw["bundleId"].(string); ok {
+		resp.BundleId = v
+	}
+	if v, ok := raw["productId"].(string); ok {
+		resp.ProductId = v
+	}
+	if v, ok := raw["transactionId"].(string); ok {
+		resp.TransactionId = v
+	}
+	if v, ok := raw["originalTransactionId"].(string); ok {
+		resp.OriginalTransactionId = v
+	}
+	if v, ok := raw["purchaseDate"].(float64); ok {
+		resp.PurchaseDate = time.UnixMilli(int64(v))
+	} else if v, ok := raw["purchaseDate"].(int64); ok {
+		resp.PurchaseDate = time.UnixMilli(v)
+	}
+	if v, ok := raw["revocationDate"].(float64); ok {
+		t := time.UnixMilli(int64(v))
+		resp.RevocationDate = &t
+	}
+	return &resp, nil
+}
+

pkg/iap/apple/jws_test.go

@@ -0,0 +1,35 @@
+package apple
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"testing"
+	"time"
+)
+
+func TestParseTransactionJWS(t *testing.T) {
+	payload := map[string]interface{}{
+		"bundleId":              "co.airoport.app.ios",
+		"productId":             "com.airport.vpn.pass.30d",
+		"transactionId":         "1000000000001",
+		"originalTransactionId": "1000000000000",
+		"purchaseDate":          float64(time.Now().UnixMilli()),
+	}
+	data, _ := json.Marshal(payload)
+	b64 := base64.RawURLEncoding.EncodeToString(data)
+	jws := "header." + b64 + ".signature"
+	p, err := ParseTransactionJWS(jws)
+	if err != nil {
+		t.Fatalf("parse error: %v", err)
+	}
+	if p.ProductId != payload["productId"] {
+		t.Fatalf("productId not match")
+	}
+	if p.BundleId != payload["bundleId"] {
+		t.Fatalf("bundleId not match")
+	}
+	if p.OriginalTransactionId != payload["originalTransactionId"] {
+		t.Fatalf("originalTransactionId not match")
+	}
+}
+

pkg/iap/apple/productmap.go

@@ -0,0 +1,39 @@
+package apple
+
+import (
+	"encoding/json"
+	"time"
+)
+
+type ProductMapping struct {
+	DurationDays int64  `json:"durationDays"`
+	Tier         string `json:"tier"`
+	Description  string `json:"description"`
+	PriceText    string `json:"priceText"`
+	SubscribeId  int64  `json:"subscribeId"`
+}
+
+type ProductMap struct {
+	Items map[string]ProductMapping `json:"iapProductMap"`
+}
+
+func ParseProductMap(customData string) (*ProductMap, error) {
+	if customData == "" {
+		return &ProductMap{Items: map[string]ProductMapping{}}, nil
+	}
+	var obj ProductMap
+	if err := json.Unmarshal([]byte(customData), &obj); err != nil {
+		return &ProductMap{Items: map[string]ProductMapping{}}, nil
+	}
+	if obj.Items == nil {
+		obj.Items = map[string]ProductMapping{}
+	}
+	return &obj, nil
+}
+
+func CalcExpire(start time.Time, days int64) time.Time {
+	if days <= 0 {
+		return time.UnixMilli(0)
+	}
+	return start.Add(time.Duration(days) * 24 * time.Hour)
+}

pkg/iap/apple/types.go

@@ -0,0 +1,13 @@
+package apple
+
+import "time"
+
+type TransactionPayload struct {
+	BundleId               string    `json:"bundleId"`
+	ProductId              string    `json:"productId"`
+	TransactionId          string    `json:"transactionId"`
+	OriginalTransactionId  string    `json:"originalTransactionId"`
+	PurchaseDate           time.Time `json:"purchaseDate"`
+	RevocationDate         *time.Time`json:"revocationDate"`
+}
+