Первый прототип с основными возможностями

services/key.go

@@ -0,0 +1,38 @@
+package services
+
+import (
+	"context"
+	"math/rand"
+	"time"
+
+	"code.gurenya.net/carlsmei/muninn-aio/db"
+	"code.gurenya.net/carlsmei/muninn-aio/ent/link"
+)
+
+// Key Generation Algorithm 6:51 MSK 29.07.24
+
+var numChars = 8
+var keyAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+var seededRand *rand.Rand = rand.New(
+	rand.NewSource(time.Now().UnixNano()))
+
+func GenerateKey(ctx context.Context) string {
+	client := db.GetEntClient()
+	cond := false
+	key := make([]byte, numChars)
+
+	for !cond {
+		for i := range key {
+			key[i] = keyAlphabet[seededRand.Intn(len(keyAlphabet))]
+		}
+
+		exists, _ := client.Link.
+			Query().
+			Where(link.Key(string(key))).
+			Exist(ctx)
+
+		cond = !exists
+	}
+
+	return string(key)
+}