start implementing analyzers

It turns out that the different encounters do require quite some
encounter-specific logic, not only to determine whether the CM was
activated, but also to determine whether the fight was successful, the
duration of the fight, later the phases, ...

Wrapping all of this in pre-defined "triggers" (like CmTrigger) feels
like it will be a bit unfitting, so with this patch we have introduced
the evtclib::Analyzer, which can be used to analyze the fights.
Currently, the whole CM detection logic has been moved to this new
interface, and soon we also want the success-detection logic in there.

The tests pass and the interface of Log::is_cm is unchanged.

1 files changed, 62 insertions, 0 deletions

diff --git a/src/analyzers/raids/w5.rs b/src/analyzers/raids/w5.rs
new file mode 100644
index 0000000..b8c3f3c
--- /dev/null
+++ b/src/analyzers/raids/w5.rs
@@ -0,0 +1,62 @@
+//! Boss fight analyzers for Wing 5 (Hall of Chains)
+use crate::{
+    analyzers::{helpers, Analyzer},
+    Log,
+};
+
+pub const DESMINA_BUFF_ID: u32 = 47414;
+pub const DESMINA_MS_THRESHOLD: u64 = 11_000;
+
+/// Analyzer for the first fight of Wing 5, Soulless Horror (aka. Desmina).
+///
+/// The CM is detected by the time between applications of the Necrosis debuff, which is applied at
+/// a faster rate when the challenge mote is active.
+#[derive(Debug, Clone, Copy)]
+pub struct SoullessHorror<'log> {
+    log: &'log Log,
+}
+
+impl<'log> SoullessHorror<'log> {
+    pub fn new(log: &'log Log) -> Self {
+        SoullessHorror { log }
+    }
+}
+
+impl<'log> Analyzer for SoullessHorror<'log> {
+    fn log(&self) -> &Log {
+        self.log
+    }
+
+    fn is_cm(&self) -> bool {
+        let tbb = helpers::time_between_buffs(self.log, DESMINA_BUFF_ID);
+        tbb > 0 && tbb <= DESMINA_MS_THRESHOLD
+    }
+}
+
+pub const DHUUM_CM_HEALTH: u64 = 40_000_000;
+
+/// Analyzer for the second fight of Wing 5, Dhuum.
+///
+/// The CM is detected by the boss's health, which is higher in the challenge mote.
+#[derive(Debug, Clone, Copy)]
+pub struct Dhuum<'log> {
+    log: &'log Log,
+}
+
+impl<'log> Dhuum<'log> {
+    pub fn new(log: &'log Log) -> Self {
+        Dhuum { log }
+    }
+}
+
+impl<'log> Analyzer for Dhuum<'log> {
+    fn log(&self) -> &Log {
+        self.log
+    }
+
+    fn is_cm(&self) -> bool {
+        helpers::boss_health(self.log)
+            .map(|h| h >= DHUUM_CM_HEALTH)
+            .unwrap_or(false)
+    }
+}