1 files changed, 55 insertions, 0 deletions
diff --git a/aero-ical/src/prune.rs b/aero-ical/src/prune.rs
new file mode 100644
index 0000000..3eb50ca
--- /dev/null
+++ b/aero-ical/src/prune.rs
@@ -0,0 +1,55 @@
+use aero_dav::caltypes as cal;
+use icalendar::parser::{Component, Property};
+
+pub fn component<'a>(src: &'a Component<'a>, prune: &cal::Comp) -> Option<Component<'a>> {
+    if src.name.as_str() != prune.name.as_str() {
+        return None;
+    }
+
+    let name = src.name.clone();
+
+    let properties = match &prune.prop_kind {
+        Some(cal::PropKind::AllProp) | None => src.properties.clone(),
+        Some(cal::PropKind::Prop(l)) => src
+            .properties
+            .iter()
+            .filter_map(|prop| {
+                let sel_filt = match l
+                    .iter()
+                    .find(|filt| filt.name.0.as_str() == prop.name.as_str())
+                {
+                    Some(v) => v,
+                    None => return None,
+                };
+
+                match sel_filt.novalue {
+                    None | Some(false) => Some(prop.clone()),
+                    Some(true) => Some(Property {
+                        name: prop.name.clone(),
+                        params: prop.params.clone(),
+                        val: "".into(),
+                    }),
+                }
+            })
+            .collect::<Vec<_>>(),
+    };
+
+    let components = match &prune.comp_kind {
+        Some(cal::CompKind::AllComp) | None => src.components.clone(),
+        Some(cal::CompKind::Comp(many_inner_prune)) => src
+            .components
+            .iter()
+            .filter_map(|src_component| {
+                many_inner_prune
+                    .iter()
+                    .find_map(|inner_prune| component(src_component, inner_prune))
+            })
+            .collect::<Vec<_>>(),
+    };
+
+    Some(Component {
+        name,
+        properties,
+        components,
+    })
+}