From fa1835ada63bade9a12b17fc419520a9730d33ae Mon Sep 17 00:00:00 2001
From: Step7750 <step7750@gmail.com>
Date: Thu, 20 Jul 2023 00:49:08 -0600
Subject: [PATCH] Prevents Overriding Page Size when `start` Query Param

Fixes #159
---
 src/lib/components/market/page_size.ts |  7 ++++++-
 src/lib/utils/browser.ts               | 12 ++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 src/lib/utils/browser.ts

diff --git a/src/lib/components/market/page_size.ts b/src/lib/components/market/page_size.ts
index a9adca8c..8445b222 100644
--- a/src/lib/components/market/page_size.ts
+++ b/src/lib/components/market/page_size.ts
@@ -6,6 +6,7 @@ import {query, state} from 'lit/decorators.js';
 import {Get} from '../../bridge/handlers/storage_get';
 import {Set} from '../../bridge/handlers/storage_set';
 import {PAGE_SIZE} from '../../storage/keys';
+import {hasQueryParameter} from '../../utils/browser';
 
 @CustomElement()
 export class PageSize extends FloatElement {
@@ -33,7 +34,11 @@ export class PageSize extends FloatElement {
         super.connectedCallback();
 
         const size = await Get(PAGE_SIZE);
-        if (size) {
+
+        // Don't override if the user is manually overriding the start query param
+        // ie. "https://steamcommunity.com/market/listings/730/AK-47%20%7C%20Slate%20%28Field-Tested%29?start=100&count=100"
+        // Steam already has a bug that pagination doesn't work when setting this.
+        if (size && !hasQueryParameter('start')) {
             this.changePageSize(size);
         }
     }
diff --git a/src/lib/utils/browser.ts b/src/lib/utils/browser.ts
new file mode 100644
index 00000000..db3d561a
--- /dev/null
+++ b/src/lib/utils/browser.ts
@@ -0,0 +1,12 @@
+/*
+ * Functions related to the browser page (ie. parsing the URL)
+ */
+
+export function getQueryParameter(param: string): string | null {
+    const url = new URL(window.location.href);
+    return url.searchParams.get(param);
+}
+
+export function hasQueryParameter(param: string): boolean {
+    return !!getQueryParameter(param);
+}