migrate from github

2026-07-15 22:42:31 +08:00
commit 3ad559f05e
262 changed files with 21637 additions and 0 deletions
@@ -0,0 +1,45 @@
+package utils
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"sync"
+
+	"github.com/bwmarrin/snowflake"
+)
+
+var (
+	node     *snowflake.Node
+	nodeOnce sync.Once
+	nodeErr  error
+)
+
+type ExternalIDContext string
+
+const (
+	ExternalIDContextUser         ExternalIDContext = "user"
+	ExternalIDKnowledgeBase       ExternalIDContext = "knowledge_base"
+	ExternalIDContextDocument     ExternalIDContext = "document"
+	ExternalIDContextUserGroup    ExternalIDContext = "user_group"
+	ExternalIDContextOrgNode      ExternalIDContext = "org_node"
+	ExternalIDContextComment      ExternalIDContext = "comment"
+	ExternalIDContextNotification ExternalIDContext = "notification"
+	ExternalIDContextAttachment   ExternalIDContext = "attachment"
+)
+
+func GenerateExternalID(context ExternalIDContext) string {
+	initSnowflakeNode()
+	if nodeErr != nil {
+		panic(nodeErr)
+	}
+	id := node.Generate()
+	combined := string(context) + ":" + id.String()
+	hash := md5.Sum([]byte(combined))
+	return hex.EncodeToString(hash[:])
+}
+
+func initSnowflakeNode() {
+	nodeOnce.Do(func() {
+		node, nodeErr = snowflake.NewNode(1)
+	})
+}