initial commit

src/rss.rs

@@ -0,0 +1,91 @@
+#![allow(dead_code)]
+
+// See https://support.google.com/podcast-publishers/answer/9889544
+// for some reasonably guidelines for how a podcast RSS feed should look.
+
+use std::fmt;
+use std::borrow::Cow;
+
+#[derive(Debug, serde::Deserialize)]
+pub struct Feed<'a> {
+    pub (crate) rss : Rss<'a>,
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct Rss<'a> {
+    pub (crate) channel : Channel<'a>,
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct Channel<'a> {
+    #[serde(rename = "item", default)]
+    pub (crate) items : Vec<Item<'a>>,
+    pub (crate) link : Cow<'a, str>,
+    pub (crate) title : Cow<'a, str>,
+    pub (crate) description : Option<Cow<'a, str>>,
+    #[serde(rename = "{http://www.itunes.com/dtds/podcast-1.0.dtd}itunes:author")]
+    pub (crate) author : Option<Cow<'a, str>>,
+    #[serde(rename = "{http://www.itunes.com/dtds/podcast-1.0.dtd}itunes:summary")]
+    pub (crate) summary : Option<Cow<'a, str>>,
+    #[serde(rename = "{http://www.itunes.com/dtds/podcast-1.0.dtd}itunes:image")]
+    pub (crate) itunes_image : Option<ItunesImage<'a>>,
+    pub (crate) image : Option<Image<'a>>,
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct Image<'a> {
+    pub (crate) link : Cow<'a, str>,
+    pub (crate) title : Cow<'a, str>,
+    pub (crate) url : Cow<'a, str>,
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct ItunesImage<'a> {
+    #[serde(rename = "$attr:href")]
+    pub (crate) href : Cow<'a, str>,
+}
+
+fn deserialize_publish_date<'de, D : serde::de::Deserializer<'de>> (
+    deserializer : D
+) -> Result<chrono::NaiveDateTime, D::Error> {
+    struct Visitor;
+    impl<'de> serde::de::Visitor<'de> for Visitor {
+        type Value = chrono::NaiveDateTime;
+    
+        fn expecting(&self, formatter : &mut fmt::Formatter) -> fmt::Result {
+            formatter.write_str("a string containing json data")
+        }
+    
+        fn visit_str<E : serde::de::Error>(self, input : &str) -> Result<Self::Value, E> {
+            chrono::NaiveDateTime::parse_from_str(
+                input,
+                "%a, %d %b %Y %H:%M:%S %Z"
+            ).map_err(E::custom)
+        }
+    }
+    
+    deserializer.deserialize_any(Visitor)
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct Item<'a> {
+    pub (crate) title : Cow<'a, str>,
+    pub (crate) enclosure : Option<Enclosure<'a>>,
+    pub (crate) description : Option<Cow<'a, str>>,
+    #[serde(rename = "{http://www.itunes.com/dtds/podcast-1.0.dtd}itunes:summary")]
+    pub (crate) summary : Option<Cow<'a, str>>,
+    #[serde(rename = "pubDate", deserialize_with = "deserialize_publish_date")]
+    pub (crate) published : chrono::NaiveDateTime,
+    pub (crate) guid : Option<Cow<'a, str>>,
+}
+
+#[derive(Debug, serde::Deserialize)]
+pub struct Enclosure<'a> {
+    #[serde(rename = "$attr:url")]
+    pub (crate) url : Cow<'a, str>,
+    #[serde(rename = "$attr:type")]
+    pub (crate) mime_type : Option<Cow<'a, str>>,
+    #[serde(rename = "$attr:length")]
+    pub (crate) length : Option<u64>,
+}
+