From 5e5017a1858498043147ae9297a917ccfb91fb5d Mon Sep 17 00:00:00 2001
From: Lennart K <18233294+lennart-k@users.noreply.github.com>
Date: Wed, 7 Jan 2026 11:46:28 +0100
Subject: [PATCH] Decrease folder nesting

---
 crates/ical/src/calendar_object.rs            | 136 ++++++++++++++++++
 .../src/{icalendar/object.rs => icalendar.rs} |   0
 crates/ical/src/icalendar/mod.rs              |   3 -
 crates/ical/src/lib.rs                        |   4 +-
 4 files changed, 138 insertions(+), 5 deletions(-)
 create mode 100644 crates/ical/src/calendar_object.rs
 rename crates/ical/src/{icalendar/object.rs => icalendar.rs} (100%)
 delete mode 100644 crates/ical/src/icalendar/mod.rs

diff --git a/crates/ical/src/calendar_object.rs b/crates/ical/src/calendar_object.rs
new file mode 100644
index 0000000..7035e49
--- /dev/null
+++ b/crates/ical/src/calendar_object.rs
@@ -0,0 +1,136 @@
+use crate::Error;
+use chrono::DateTime;
+use chrono::Utc;
+use derive_more::Display;
+use ical::component::CalendarInnerData;
+use ical::component::IcalCalendarObject;
+use ical::parser::ComponentParser;
+use serde::Deserialize;
+use serde::Serialize;
+use sha2::{Digest, Sha256};
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Display)]
+// specified in https://datatracker.ietf.org/doc/html/rfc5545#section-3.6
+pub enum CalendarObjectType {
+    #[serde(rename = "VEVENT")]
+    Event = 0,
+    #[serde(rename = "VTODO")]
+    Todo = 1,
+    #[serde(rename = "VJOURNAL")]
+    Journal = 2,
+}
+
+impl From<&IcalCalendarObject> for CalendarObjectType {
+    fn from(value: &IcalCalendarObject) -> Self {
+        match value.get_inner() {
+            CalendarInnerData::Event(_, _) => Self::Event,
+            CalendarInnerData::Todo(_, _) => Self::Todo,
+            CalendarInnerData::Journal(_, _) => Self::Journal,
+        }
+    }
+}
+
+impl CalendarObjectType {
+    #[must_use]
+    pub const fn as_str(&self) -> &'static str {
+        match self {
+            Self::Event => "VEVENT",
+            Self::Todo => "VTODO",
+            Self::Journal => "VJOURNAL",
+        }
+    }
+}
+
+impl rustical_xml::ValueSerialize for CalendarObjectType {
+    fn serialize(&self) -> String {
+        self.as_str().to_owned()
+    }
+}
+
+impl rustical_xml::ValueDeserialize for CalendarObjectType {
+    fn deserialize(val: &str) -> std::result::Result<Self, rustical_xml::XmlError> {
+        match <String as rustical_xml::ValueDeserialize>::deserialize(val)?.as_str() {
+            "VEVENT" => Ok(Self::Event),
+            "VTODO" => Ok(Self::Todo),
+            "VJOURNAL" => Ok(Self::Journal),
+            _ => Err(rustical_xml::XmlError::InvalidValue(
+                rustical_xml::ParseValueError::Other(format!(
+                    "Invalid value '{val}', must be VEVENT, VTODO, or VJOURNAL"
+                )),
+            )),
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct CalendarObject {
+    id: String,
+    inner: IcalCalendarObject,
+    ics: String,
+}
+
+impl CalendarObject {
+    pub fn from_ics(ics: String, id: Option<String>) -> Result<Self, Error> {
+        let mut parser: ComponentParser<_, IcalCalendarObject> =
+            ComponentParser::new(ics.as_bytes());
+        let inner = parser.next().ok_or(Error::MissingCalendar)??;
+        if parser.next().is_some() {
+            return Err(Error::InvalidData(
+                "multiple calendars, only one allowed".to_owned(),
+            ));
+        }
+
+        Ok(Self {
+            id: id.unwrap_or_else(|| inner.get_uid().to_owned()),
+            inner,
+            ics,
+        })
+    }
+
+    #[must_use]
+    pub const fn get_inner(&self) -> &IcalCalendarObject {
+        &self.inner
+    }
+
+    #[must_use]
+    pub fn get_uid(&self) -> &str {
+        self.inner.get_uid()
+    }
+
+    #[must_use]
+    pub fn get_id(&self) -> &str {
+        &self.id
+    }
+
+    #[must_use]
+    pub fn get_etag(&self) -> String {
+        let mut hasher = Sha256::new();
+        hasher.update(self.get_uid());
+        hasher.update(self.get_ics());
+        format!("\"{:x}\"", hasher.finalize())
+    }
+
+    #[must_use]
+    pub fn get_ics(&self) -> &str {
+        &self.ics
+    }
+
+    #[must_use]
+    pub fn get_component_name(&self) -> &str {
+        self.get_object_type().as_str()
+    }
+
+    #[must_use]
+    pub fn get_object_type(&self) -> CalendarObjectType {
+        (&self.inner).into()
+    }
+
+    pub fn expand_recurrence(
+        &self,
+        start: Option<DateTime<Utc>>,
+        end: Option<DateTime<Utc>>,
+    ) -> Result<String, Error> {
+        // Ok(self.inner.expand_recurrence(start, end)?)
+        todo!()
+    }
+}
diff --git a/crates/ical/src/icalendar/object.rs b/crates/ical/src/icalendar.rs
similarity index 100%
rename from crates/ical/src/icalendar/object.rs
rename to crates/ical/src/icalendar.rs
diff --git a/crates/ical/src/icalendar/mod.rs b/crates/ical/src/icalendar/mod.rs
deleted file mode 100644
index 75ce6bc..0000000
--- a/crates/ical/src/icalendar/mod.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-mod object;
-
-pub use object::*;
diff --git a/crates/ical/src/lib.rs b/crates/ical/src/lib.rs
index 42f646f..7e1aa43 100644
--- a/crates/ical/src/lib.rs
+++ b/crates/ical/src/lib.rs
@@ -3,8 +3,8 @@
 mod timestamp;
 pub use timestamp::*;
 
-mod icalendar;
-pub use icalendar::*;
+mod calendar_object;
+pub use calendar_object::*;
 
 mod error;
 pub use error::Error;