filesystem path tool, tests pass again

src/util/mod.rs

@@ -1,6 +1,7 @@
 pub mod anyhow_result;
 pub mod email_to_gravatar;
 pub mod filesystem;
-pub mod random_prefix_crockford_token;
 pub mod random_crockford_token;
-pub mod random_uuid;
+pub mod random_prefix_crockford_token;
+pub mod random_uuid;
+pub mod semi_persistent_cache_dir;

src/util/semi_persistent_cache_dir.rs

@@ -0,0 +1,68 @@
+use std::path::{PathBuf, Path};
+use std::fs;
+use crate::util::anyhow_result::AnyhowResult;
+
+/// These are for files on the worker filesystems
+pub struct SemiPersistentCacheDir {
+  cache_root: PathBuf,
+  tts_model_root: PathBuf,
+  w2l_model_root: PathBuf,
+  w2l_face_templates_root: PathBuf,
+  video_asset_root: PathBuf, // end bump, etc.
+}
+
+impl SemiPersistentCacheDir {
+
+
+  /// Everything is rooted at `/file_cache`.
+  pub fn default_paths() -> Self {
+    // NB: This is the root of the filesystem
+    Self::configured_root("/file_cache/")
+  }
+
+  pub fn configured_root(root_path: &str) -> Self {
+    let cache_root = PathBuf::from(root_path);
+    Self {
+      cache_root: cache_root.clone(),
+      tts_model_root: cache_root.join("tts/models/"),
+      w2l_model_root: cache_root.join("w2l/models/"),
+      w2l_face_templates_root: cache_root.join("w2l/face_templates/"),
+      video_asset_root: cache_root.join("static_video_assets/"),
+    }
+  }
+
+  /// We cache TTS models here.
+  pub fn tts_model_path(&self) -> &Path {
+    &self.tts_model_root
+  }
+
+  /// We cache W2L models here.
+  pub fn w2l_model_path(&self) -> &Path {
+    &self.w2l_model_root
+  }
+
+  /// Face templates go here.
+  pub fn w2l_face_templates_path(&self) -> &Path {
+    &self.w2l_face_templates_root
+  }
+
+  /// End bump, etc.
+  pub fn video_asset_path(&self) -> &Path {
+    &self.video_asset_root
+  }
+
+  pub fn create_w2l_model_path(&self) -> AnyhowResult<()> {
+    let _ = fs::create_dir_all(self.w2l_model_path())?;
+    Ok(())
+  }
+
+  pub fn create_w2l_face_templates_path(&self) -> AnyhowResult<()> {
+    let _ = fs::create_dir_all(self.w2l_face_templates_path())?;
+    Ok(())
+  }
+
+  pub fn create_video_asset_path(&self) -> AnyhowResult<()> {
+    let _ = fs::create_dir_all(self.video_asset_path())?;
+    Ok(())
+  }
+}