Update all libraries to the new database format

crates/tmdb/src/api/mod.rs

@@ -1,9 +1,15 @@
 //! TMDB API clients
 
+use core::ops::Deref;
+use core::time::Duration;
+use std::sync::RwLock;
+
+use governor::Jitter;
 use reqwest::Request;
 use reqwest::header;
+use serde::de::DeserializeOwned;
 
-use crate::Config;
+use crate::{Cache, CachePolicy, Config};
 
 pub mod collections;
 pub mod episodes;
@@ -20,6 +26,9 @@ pub enum Error {
 	/// Reqwest error wrapper
 	#[error("reqwest error: {0}")]
 	Reqwest(#[from] reqwest::Error),
+	/// Json error wrapper
+	#[error("json error: {0}")]
+	Json(#[from] serde_json::Error),
 }
 
 fn make_request(config: &Config, path: &str, language: Option<&str>) -> Result<Request, Error> {
@@ -38,3 +47,58 @@ fn make_request(config: &Config, path: &str, language: Option<&str>) -> Result<R
 
 	Ok(builder.build()?)
 }
+
+async fn exec_request<T: DeserializeOwned>(
+	config: &Config,
+	cache: &dyn Cache,
+	policy: &RwLock<CachePolicy>,
+	request: Request,
+) -> Result<T, Error> {
+	let (read_cache, write_cache) = if let Ok(guard) = policy.read() {
+		match guard.deref() {
+			CachePolicy::None => (None, None),
+			CachePolicy::Full => (Some(cache), Some(cache)),
+			CachePolicy::Read => (Some(cache), None),
+			CachePolicy::Update => (None, Some(cache)),
+		}
+	} else {
+		(None, None)
+	};
+
+	let path = request.url().path().to_owned();
+
+	// read the cache and fall back to reqwest
+	let mut response = None;
+	if let Some(cache) = read_cache {
+		response = cache.get(&path);
+	}
+	let needs_cache_write = response.is_none();
+	let response = match response {
+		Some(response) => response,
+		None => {
+			config
+				.limiter
+				.until_ready_with_jitter(Jitter::new(
+					Duration::from_millis(0),
+					Duration::from_millis(50),
+				))
+				.await;
+			config
+				.client
+				.execute(request)
+				.await?
+				.error_for_status()?
+				.bytes()
+				.await?
+		}
+	};
+
+	// write to the cache if needed
+	if let Some(cache) = write_cache
+		&& needs_cache_write
+	{
+		cache.set(&path, &response);
+	}
+
+	Ok(serde_json::from_slice(&response)?)
+}