Remove hardcoded "win32" string in repository filename functions

Second part to that recent refactor, so eventually it might be possible
to read DATs from other platforms.

src/common.rs

@@ -66,3 +66,11 @@ pub enum Platform {
     PS3,
     PS4,
 }
+
+pub fn get_platform_string(id: &Platform) -> &'static str {
+    match &id {
+        Platform::Win32 => "win32",
+        Platform::PS3 => "ps3.d",
+        Platform::PS4 => "ps4.d",
+    }
+}

src/patch.rs

@@ -12,7 +12,7 @@ use binrw::BinRead;
 use binrw::binrw;
 use tracing::{debug, warn};
 
-use crate::common::{Platform, Region};
+use crate::common::{get_platform_string, Platform, Region};
 use crate::sqpack::read_data_block_patch;
 
 #[binread]
@@ -263,14 +263,6 @@ struct SqpkFileOperationData {
     path: String,
 }
 
-fn get_platform_string(id: &Platform) -> &'static str {
-    match &id {
-        Platform::Win32 => "win32",
-        Platform::PS3 => "ps3.d",
-        Platform::PS4 => "ps4.d",
-    }
-}
-
 #[derive(BinRead, PartialEq, Debug)]
 #[br(big)]
 struct SqpkTargetInfo {

src/repository.rs

@@ -6,7 +6,7 @@ use std::cmp::Ordering::{Greater, Less};
 use std::path::{Path, PathBuf};
 use binrw::binrw;
 
-use crate::common::{Platform, read_version};
+use crate::common::{get_platform_string, Platform, read_version};
 use crate::repository::RepositoryType::{Base, Expansion};
 
 /// The type of repository, discerning game data from expansion data.
@@ -177,7 +177,7 @@ impl Repository {
             category as i32,
             self.expansion(),
             0,
-            "win32"
+            get_platform_string(&self.platform)
         )
     }
     
@@ -193,7 +193,7 @@ impl Repository {
     pub fn dat_filename(&self, category: Category, data_file_id: u32) -> String {
         let expansion = self.expansion();
         let chunk = 0;
-        let platform = "win32";
+        let platform = get_platform_string(&self.platform);
 
         format!(
             "{:02x}{expansion:02}{chunk:02}.{platform}.dat{data_file_id}",