Implement FCM [WIP]

scnserver/models/ids_gen.go

@@ -1,8 +1,9 @@
-// Code generated by id-generate.go DO NOT EDIT.
+// Code generated by csid-generate.go DO NOT EDIT.
 
 package models
 
 import "crypto/rand"
+import "crypto/sha256"
 import "fmt"
 import "github.com/go-playground/validator/v10"
 import "github.com/rs/zerolog/log"
@@ -14,7 +15,7 @@ import "reflect"
 import "regexp"
 import "strings"
 
-const ChecksumCharsetIDGenerator = "8926e4a9845e67086109bef7ca447371ab5c0a94fcfd988f14fd4ee98da9e932" // GoExtVersion: 0.0.291
+const ChecksumCharsetIDGenerator = "69a99f8c01a15baad2fc9b99c516a700e02ce4dbcae452699e6d43cc23bc01bc" // GoExtVersion: 0.0.463
 
 const idlen = 24
 
@@ -64,10 +65,10 @@ func generateCharsetMap() []int {
 
 func generateID(prefix string) string {
 	k := ""
-	max := big.NewInt(int64(idCharsetLen))
+	csMax := big.NewInt(int64(idCharsetLen))
 	checksum := 0
 	for i := 0; i < idlen-len(prefix)-checklen; i++ {
-		v, err := rand.Int(rand.Reader, max)
+		v, err := rand.Int(rand.Reader, csMax)
 		if err != nil {
 			panic(err)
 		}
@@ -79,6 +80,27 @@ func generateID(prefix string) string {
 	return prefix + k + checkstr
 }
 
+func generateIDFromSeed(prefix string, seed string) string {
+	h := sha256.New()
+
+	iddata := ""
+	for len(iddata) < idlen-len(prefix)-checklen {
+		h.Write([]byte(seed))
+		bs := h.Sum(nil)
+		iddata += langext.NewAnyBaseConverter(idCharset).Encode(bs)
+	}
+
+	checksum := 0
+	for i := 0; i < idlen-len(prefix)-checklen; i++ {
+		ichr := int(iddata[i])
+		checksum = (checksum + charSetReverseMap[ichr]) % (idCharsetLen)
+	}
+
+	checkstr := string(idCharset[checksum%idCharsetLen])
+
+	return prefix + iddata[:(idlen-len(prefix)-checklen)] + checkstr
+}
+
 func validateID(prefix string, value string) error {
 	if len(value) != idlen {
 		return exerr.New(exerr.TypeInvalidCSID, "id has the wrong length").Str("value", value).Build()