From f0a480757417a1130c1fac272de96d44e4c0479e Mon Sep 17 00:00:00 2001
From: Arie Trouw <arie.trouw@xylabs.com>
Date: Thu, 29 Aug 2024 18:02:30 -0700
Subject: [PATCH] quadkey bug fix

---
 package.json                                         |  2 +-
 packages/sdk-utils/packages/quadkey/src/Quadkey.ts   |  3 +++
 .../packages/quadkey/src/spec/Quadkey.spec.ts        | 12 ++++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index c694c8c11c..610dfc7ae7 100644
--- a/package.json
+++ b/package.json
@@ -125,4 +125,4 @@
     "access": "public"
   },
   "resolutions_comment": "We set the above resolutions to make sure we pull in the latest versions of these packages even if some sub packages request earlier versions"
-}
+}
\ No newline at end of file
diff --git a/packages/sdk-utils/packages/quadkey/src/Quadkey.ts b/packages/sdk-utils/packages/quadkey/src/Quadkey.ts
index 6933c572a8..f7e7ee9495 100644
--- a/packages/sdk-utils/packages/quadkey/src/Quadkey.ts
+++ b/packages/sdk-utils/packages/quadkey/src/Quadkey.ts
@@ -55,6 +55,9 @@ export class Quadkey {
   }
 
   get base4Hash() {
+    if (this.id === 0n && this.zoom === 0) {
+      return ''
+    }
     return this.id.toString(4).padStart(this.zoom, '0')
   }
 
diff --git a/packages/sdk-utils/packages/quadkey/src/spec/Quadkey.spec.ts b/packages/sdk-utils/packages/quadkey/src/spec/Quadkey.spec.ts
index 04516ff492..49b91cd2ca 100644
--- a/packages/sdk-utils/packages/quadkey/src/spec/Quadkey.spec.ts
+++ b/packages/sdk-utils/packages/quadkey/src/spec/Quadkey.spec.ts
@@ -10,4 +10,16 @@ describe('Quadkey', () => {
     expect(center?.lat).toBe(48.378_236)
     expect(center?.lng).toBe(-146.25)
   })
+  test('Zero Children', () => {
+    const qk = Quadkey.Zero
+    expect(qk.base16String).toBe('00000000000000000000000000000000000000000000000000000000000000')
+    expect(qk.zoom).toBe(0)
+    expect(qk.base4Hash).toBe('')
+    const children = qk?.children
+    expect(children?.length).toBe(4)
+    expect(children?.[0].base4Hash).toBe('0')
+    expect(children?.[1].base4Hash).toBe('1')
+    expect(children?.[2].base4Hash).toBe('2')
+    expect(children?.[3].base4Hash).toBe('3')
+  })
 })