Improve template file names

Now it contains the platforms, the game version and the mod id.
  Before: template.zip
  After: my_mod-1.21-fabric-neoforge-template.zip
         my_mod-1.18.2-forge-only-template.zip

src/app/generator.rs

@@ -16,19 +16,24 @@ use version_resolver::maven::{resolve_latest_version, resolve_matching_version,
 
 pub async fn generate(app: &super::GeneratorApp) -> Result<()> {
     let mut context = engine::Context::new();
+    // This vec contains all dash-separated parts of the template file name.
+    // Example: my_mod-1.21-fabric-neoforge-template.zip
+    let mut file_name_parts: Vec<String> = Vec::new();
     // Mod properties
     context.put("PACKAGE_NAME", &app.package_name);
     context.put("PACKAGE_DIR", &app.package_name.replace(".", "/"));
     let mut mod_id: String = app.mod_id.clone();
     if mod_id.is_empty() {
         mod_id = crate::mod_ids::to_mod_id(&app.mod_name);
     }
+    file_name_parts.push(mod_id.clone());
     context.put("MOD_ID", mod_id);
     let escaped_name = escape_json_and_toml(&app.mod_name);
     context.put("MOD_NAME", escaped_name);
 
     // Game version-specific
     let game_version = app.game_version;
+    file_name_parts.push(game_version.version().to_owned());
     context.put("MINECRAFT_VERSION", game_version.version());
     context.put(
         "GRADLE_JAVA_VERSION",
@@ -161,6 +166,11 @@ pub async fn generate(app: &super::GeneratorApp) -> Result<()> {
                 platforms.push("quilt");
             }
 
+            // Add all platforms to template file name.
+            for platform in &platforms {
+                file_name_parts.push((*platform).to_owned());
+            }
+
             let platforms = platforms.join(",");
             context.put("ARCHITECTURY_PLATFORMS", platforms);
 
@@ -188,6 +198,7 @@ pub async fn generate(app: &super::GeneratorApp) -> Result<()> {
                 files.push(Box::pin(neoforge_only::neoforge_mods_toml_files(client.clone())));
             }
             context.maybe_put("NEOFORGE_YARN_PATCH_VERSION", versions.neoforge_yarn_patch);
+            file_name_parts.push("neoforge-only".to_owned());
         }
         ProjectType::Forge => {
             files.push(Box::pin(forge_only::all_files(client.clone())));
@@ -197,9 +208,13 @@ pub async fn generate(app: &super::GeneratorApp) -> Result<()> {
                     std::future::ready(Ok(version)),
                 )));
             }
+            file_name_parts.push("forge-only".to_owned());
         }
     }
 
+    // Add final template suffix to file name
+    file_name_parts.push("template".to_owned());
+
     // Resolve versions
     let (files, variables) = join!(join_all(files), join_all(variables));
     let files: Vec<FileData> = files
@@ -214,6 +229,9 @@ pub async fn generate(app: &super::GeneratorApp) -> Result<()> {
     }
 
     engine::filer::use_filer(|filer| {
+        let file_name = file_name_parts.join("-");
+        filer.set_file_name(file_name);
+
         for file_data in files {
             let path = engine::apply_variables(&context, file_data.path.as_str(), false);
             let content: Bytes = match &file_data.content {

src/templates/engine/filer.rs

@@ -9,6 +9,7 @@ use std::io::{Cursor, Seek, Write};
 use zip::write::FileOptions;
 
 pub trait Filer {
+    fn set_file_name(&mut self, file_name: String);
     fn save(&mut self, path: &str, content: &[u8], permissions: &FilePermissions) -> Result<()>;
 }
 
@@ -32,6 +33,7 @@ where
 {
     writer: &'a mut zip::ZipWriter<W>,
     directories: HashSet<String>,
+    pub file_name: Option<String>,
 }
 
 impl<'a, W> ZipFiler<'a, W>
@@ -42,6 +44,7 @@ where
         Self {
             writer,
             directories: HashSet::new(),
+            file_name: None,
         }
     }
 }
@@ -72,6 +75,10 @@ where
         self.writer.write_all(content).into_diagnostic()?;
         Ok(())
     }
+
+    fn set_file_name(&mut self, file_name: String) {
+        self.file_name = Some(file_name)
+    }
 }
 
 #[cfg(not(target_family = "wasm"))]
@@ -139,6 +146,10 @@ mod native {
             update_permissions(&full_path, permissions)?;
             Ok(())
         }
+
+        fn set_file_name(&mut self, _file_name: String) {
+            // Don't do anything as the directory filer prompts for the output name.
+        }
     }
 }
 
@@ -147,6 +158,7 @@ where
     F: FnOnce(&mut dyn Filer) -> Result<()>,
 {
     let mut cursor = Cursor::new(Vec::new());
+    let mut file_name: String = "template.zip".to_owned();
 
     // Create and use the zip writer and filer.
     // This is its own scope in order to drop the borrow to the cursor.
@@ -155,14 +167,18 @@ where
         {
             let mut filer = ZipFiler::new(&mut writer);
             block(&mut filer)?;
+
+            if let Some(custom_name) = filer.file_name {
+                file_name = custom_name + ".zip";
+            }
         }
         writer.finish().into_diagnostic()?;
     }
 
     let saved = AsyncFileDialog::new()
         .set_title("Choose where to save the template")
         .add_filter("Zip file", &["zip"])
-        .set_file_name("template.zip")
+        .set_file_name(file_name)
         .save_file()
         .await;