From a6a3fe8ec290ec11f6a30dcae3de07fe3aea76fa Mon Sep 17 00:00:00 2001
From: Eauldane <elf@eauldane.com>
Date: Mon, 1 Sep 2025 02:38:29 +0100
Subject: [PATCH] Added phased startup string function for bringing services
 back online gradually

---
 global/global.go      | 13 +++++++++++++
 global/global_test.go |  4 ++++
 2 files changed, 17 insertions(+)

diff --git a/global/global.go b/global/global.go
index 8fd619d..5339968 100644
--- a/global/global.go
+++ b/global/global.go
@@ -3,6 +3,7 @@ package global
 import (
 	crand "crypto/rand" // Probably better than math/rand for this
 	"log"
+	"math/rand"
 )
 
 func GenerateRandomString(length int) string {
@@ -23,3 +24,15 @@ func GenerateRandomString(length int) string {
 	}
 	return string(charArray)
 }
+
+func PhasedStartupString() string {
+	// Redis is used for a lot of stuff, which means the Postgres DB gets HAMMERED on a fresh startup. Use
+	// this to generate a shuffled string that can be used to only allow e.g. UIDs starting with [x] to connect
+	// for the first however many seconds and incrementally expand access so that data doesn't need to be loaded all at
+	// once
+	chars := []rune("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+	rand.Shuffle(len(chars), func(i, j int) {
+		chars[i], chars[j] = chars[j], chars[i]
+	})
+	return string(chars)
+}
diff --git a/global/global_test.go b/global/global_test.go
index 8afc12c..1cd2c7b 100644
--- a/global/global_test.go
+++ b/global/global_test.go
@@ -15,3 +15,7 @@ func TestGenerateRandomString(t *testing.T) {
 	fmt.Println("Test: 30 chars")
 	fmt.Println(GenerateRandomString(30))
 }
+
+func TestPhasedStartup(t *testing.T) {
+	fmt.Printf("%c", PhasedStartupString()[1])
+}