config loading

src/config.rs

@@ -0,0 +1,66 @@
+use serde::Deserialize;
+use std::fs;
+use std::path::PathBuf;
+
+#[derive(Deserialize, Debug, PartialEq)]
+#[serde(default)]
+struct Config {
+    thumbnail_size: (u32, u32),
+    view_size: (u32, u32),
+    output_dir: PathBuf,
+}
+
+impl Config {
+    fn from_album(path: PathBuf) -> anyhow::Result<Config> {
+        let content = fs::read(path.join("photojawn.conf.yml"))?;
+        let cfg = serde_yml::from_slice(&content)?;
+        Ok(cfg)
+    }
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            thumbnail_size: (256, 256),
+            view_size: (1024, 768),
+            output_dir: PathBuf::from("site"),
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::skel::make_skeleton;
+    use mktemp::Temp;
+
+    #[test]
+    fn test_default() {
+        let c = Config::default();
+        assert_eq!(c.thumbnail_size, (256, 256));
+        assert_eq!(c.output_dir, PathBuf::from("site"));
+    }
+
+    #[test]
+    fn from_yaml() {
+        // Empty YAML gives full default values
+        let default_cfg = Config::default();
+        let cfg: Config = serde_yml::from_str("").unwrap();
+        assert_eq!(cfg, default_cfg);
+
+        // Default values for any unspecified fields
+        let cfg: Config = serde_yml::from_str("thumbnail_size: [1, 1]").unwrap();
+        assert_ne!(cfg, default_cfg);
+        assert_eq!(cfg.thumbnail_size, (1, 1));
+        assert_eq!(cfg.view_size, default_cfg.view_size);
+    }
+
+    #[test]
+    fn from_base_album() {
+        let tmpdir = Temp::new_dir().unwrap();
+        make_skeleton(&tmpdir).unwrap();
+
+        let cfg = Config::from_album(tmpdir.to_path_buf()).unwrap();
+        assert_eq!(cfg, Config::default());
+    }
+}

src/lib.rs

@@ -1 +1,2 @@
+pub mod config;
 pub mod skel;