Create functions to load data files into a single Vec

src/data/load.rs

@@ -0,0 +1,44 @@
+use std::path::*;
+use glob::{glob, GlobResult};
+use itertools::Itertools;
+use crate::data::schema::Card;
+use log::*;
+
+
+#[derive(Debug)]
+enum LoadingError {
+    IO(std::io::Error),
+    Parsing(serde_json::Error),
+}
+
+
+/// Load a single data file.
+fn load_file(path: PathBuf) -> Result<Vec<Card>, LoadingError> {
+    let file = std::fs::File::open(path)
+        .map_err(LoadingError::IO)?;
+    let data = serde_json::de::from_reader::<std::fs::File, Vec<Card>>(file)
+        .map_err(LoadingError::Parsing)?;
+    Ok(data)
+}
+
+
+/// Load a single data file, and handle errors by logging them as warnings.
+fn load_file_and_warn(path: PathBuf) -> Vec<Card> {
+    match load_file(path) {
+        Ok(v) => v,
+        Err(e) => {
+            warn!("{:?}", e);
+            vec![]
+        }
+    }
+}
+
+
+/// Load all possible data files.
+pub fn load_files() -> Vec<Card> {
+    glob("./data/*/en_us/data/*.json")
+        .unwrap()
+        .filter_map(GlobResult::ok)
+        .map(load_file_and_warn)
+        .concat()
+}

src/data/mod.rs

@@ -1 +1,2 @@
 pub mod schema;
+pub mod load;

src/main.rs

@@ -8,6 +8,10 @@ mod data;
 #[tokio::main]
 async fn main() {
     pretty_env_logger::init();
+
+    let data = data::load::load_files();
+    debug!("{:?}", data);
+
     info!("patched-porobot is starting...");
 
     let bot = Bot::from_env().auto_send();