Add XML schema to be used with serde

Cargo.toml

@@ -7,3 +7,5 @@ license = "GPL-3.0-or-later"
 [dependencies]
 clap = { version = "4.0.18", features = ["derive"] }
 rodio = "0.16.0"
+serde = { version = "1.0.147", features = ["derive"] }
+serde-xml-rs = "0.6.0"

src/main.rs

@@ -1,5 +1,8 @@
 use clap::Parser;
 
+#[allow(dead_code)]
+mod xml;
+
 fn play_file(file: &str) {
     use rodio::{Decoder, OutputStream, source::Source};
 

src/xml.rs

@@ -0,0 +1,63 @@
+use serde::Deserialize;
+
+// https://github.com/UoC-Radio/audio-scheduler/blob/45275818423220de90b4ae578b57acdc138e5f50/config_schema.xsd
+// TODO: Extensively check constraints such as `minOccurs` and `use="required".
+
+#[derive(Deserialize)]
+struct Fader {
+    fade_in_duration_secs: i8,
+    fade_out_duration_secs: i8,
+    min_level: f32,
+    max_level: f32,
+}
+
+#[derive(Deserialize)]
+struct Playlist {
+    path: String,
+    shuffle: bool,
+    fader: Fader,
+}
+
+#[derive(Deserialize)]
+struct IntermediatePlaylist {
+    path: String,
+    shuffle: bool,
+    fader: Fader,
+    sched_interval_mins: u16,
+    num_sched_items: u32,
+}
+
+#[derive(Deserialize)]
+enum ZoneContent  {
+    Main(Playlist),
+    Fallback(Playlist),
+    Intermediate(IntermediatePlaylist),
+    Maintainer(String),
+    Description(String),
+    Comment(String),
+}
+
+
+#[derive(Deserialize)]
+struct Zone {
+    name: String,
+    // TODO: Use a time struct
+    start: String,
+    zone_content: ZoneContent,
+}
+
+#[derive(Deserialize)]
+struct Day {
+    zones: Vec<Zone>,
+}
+
+#[derive(Deserialize)]
+struct WeekSchedule {
+    mon: Day,
+    tue: Day,
+    wed: Day,
+    thu: Day,
+    fri: Day,
+    sat: Day,
+    sun: Day,
+}