feat: 🎸 add frontend gray plugin (#1120)

Co-authored-by: Kent Dong <ch3cho@qq.com>

plugins/wasm-go/extensions/frontend-gray/config/config.go

@@ -0,0 +1,82 @@
+package config
+
+import (
+	"strconv"
+
+	"github.com/tidwall/gjson"
+)
+
+type GrayRule struct {
+	Name         string
+	GrayKeyValue []interface{}
+	GrayTagKey   string
+	GrayTagValue []interface{}
+}
+
+type BaseDeployment struct {
+	Name    string
+	Version string
+}
+
+type GrayDeployments struct {
+	Name    string
+	Version string
+	Enabled bool
+}
+
+type GrayConfig struct {
+	GrayKey         string
+	GraySubKey      string
+	Rules           []*GrayRule
+	BaseDeployment  *BaseDeployment
+	GrayDeployments []*GrayDeployments
+}
+
+func interfacesFromJSONResult(results []gjson.Result) []interface{} {
+	var interfaces []interface{}
+	for _, result := range results {
+		switch v := result.Value().(type) {
+		case float64:
+			// 当 v 是 float64 时，将其转换为字符串
+			interfaces = append(interfaces, strconv.FormatFloat(v, 'f', -1, 64))
+		default:
+			// 其它类型不改变，直接追加
+			interfaces = append(interfaces, v)
+		}
+	}
+	return interfaces
+}
+
+func JsonToGrayConfig(json gjson.Result, grayConfig *GrayConfig) {
+	// 解析 GrayKey
+	grayConfig.GrayKey = json.Get("grayKey").String()
+	grayConfig.GraySubKey = json.Get("graySubKey").String()
+
+	// 解析 Rules
+	rules := json.Get("rules").Array()
+	for _, rule := range rules {
+		grayRule := GrayRule{
+			Name:         rule.Get("name").String(),
+			GrayKeyValue: interfacesFromJSONResult(rule.Get("grayKeyValue").Array()), // 使用辅助函数将 []gjson.Result 转换为 []interface{}
+			GrayTagKey:   rule.Get("grayTagKey").String(),
+			GrayTagValue: interfacesFromJSONResult(rule.Get("grayTagValue").Array()),
+		}
+		grayConfig.Rules = append(grayConfig.Rules, &grayRule)
+	}
+
+	// 解析 deploy
+	baseDeployment := json.Get("baseDeployment")
+	grayDeployments := json.Get("grayDeployments").Array()
+
+	grayConfig.BaseDeployment = &BaseDeployment{
+		Name:    baseDeployment.Get("name").String(),
+		Version: baseDeployment.Get("version").String(),
+	}
+	for _, item := range grayDeployments {
+		grayConfig.GrayDeployments = append(grayConfig.GrayDeployments, &GrayDeployments{
+			Name:    item.Get("name").String(),
+			Version: item.Get("version").String(),
+			Enabled: item.Get("enabled").Bool(),
+		})
+	}
+}

plugins/wasm-go/extensions/frontend-gray/config/config_test.go

@@ -0,0 +1,27 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/tidwall/gjson"
+)
+
+func TestJsonToGrayConfig(t *testing.T) {
+	allConfigData := `{"grayKey":"userid","rules":[{"name":"inner-user","grayKeyValue":["00000001","00000005"]},{"name":"beta-user","grayKeyValue":["00000002","00000003"],"grayTagKey":"level","grayTagValue":["level3","level5"]}],"deploy":{"base":{"version":"base"},"gray":[{"name":"beta-user","version":"gray","enabled":true}]}}`
+	var tests = []struct {
+		testName string
+		grayKey  string
+		json     string
+	}{
+		{"完整的数据", "userid", allConfigData},
+	}
+	for _, test := range tests {
+		testName := test.testName
+		t.Run(testName, func(t *testing.T) {
+			var grayConfig = &GrayConfig{}
+			JsonToGrayConfig(gjson.Parse(test.json), grayConfig)
+			assert.Equal(t, test.grayKey, grayConfig.GrayKey)
+		})
+	}
+}