2 files changed, 41 insertions, 4 deletions
diff --git a/karld/src/condition.rs b/karld/src/condition.rs
index 5874e7b..a989a25 100644
--- a/karld/src/condition.rs
+++ b/karld/src/condition.rs
@@ -24,7 +24,7 @@ pub enum Direction {
     Backward,
 }
 
-trait ConditionFind {
+pub trait ConditionFind {
     fn find(&self, edge: Edge, dir: Direction, from: NaiveDateTime) -> Option<NaiveDateTime>;
 }
 
diff --git a/karld/src/main.rs b/karld/src/main.rs
index f70b7e7..1bc5798 100644
--- a/karld/src/main.rs
+++ b/karld/src/main.rs
@@ -1,9 +1,11 @@
 pub mod condition;
 pub mod interface;
 
+use chrono::NaiveDateTime;
+use condition::ConditionFind;
 use crossbeam_channel::Sender;
 use interface::network_loop;
-use karlcommon::{ClientboundPacket, Condition, Property, ServerboundPacket, Task};
+use karlcommon::{ClientboundPacket, Condition, Instance, Property, ServerboundPacket, Task};
 use log::{debug, info};
 use std::{collections::HashMap, sync::RwLock};
 
@@ -44,8 +46,8 @@ lazy_static::lazy_static! {
 
 pub fn handle_packet(client: u32, packet: ServerboundPacket, responder: Sender<ClientboundPacket>) {
     match packet {
-        ServerboundPacket::Download => {
-            let _ = responder.send(ClientboundPacket::DownloadResponse(
+        ServerboundPacket::ListTasks => {
+            let _ = responder.send(ClientboundPacket::TaskList(
                 TASKS.read().unwrap().values().map(|e| e.clone()).collect(),
             ));
         }
@@ -58,5 +60,40 @@ pub fn handle_packet(client: u32, packet: ServerboundPacket, responder: Sender<C
         ServerboundPacket::Handshake { version } => {
             debug!("{client}: version {version}");
         }
+        ServerboundPacket::ListInstances { range, task, limit } => {
+            let t = match TASKS.read().unwrap().get(&task).cloned() {
+                Some(t) => t,
+                None => {
+                    let _ =
+                        responder.send(ClientboundPacket::Error("task does not exist".to_string()));
+                    return;
+                }
+            };
+
+            let mut ocs = vec![];
+            if let Some(o) = &t.occurence {
+                let mut time = NaiveDateTime::from_timestamp(range.start.unwrap_or(0), 0);
+                let end_time = range.end.map(|e| NaiveDateTime::from_timestamp(e, 0));
+                for _ in 0..limit {
+                    let start = o.find(condition::Edge::Start, condition::Direction::Forward, time);
+                    let end = o.find(condition::Edge::End, condition::Direction::Forward, time);
+                    ocs.push(Instance {
+                        of: t.id,
+                        at: start.map(|e| e.timestamp())..end.map(|e| e.timestamp()),
+                    });
+                    if let Some(s) = end {
+                        if let Some(e) = end_time {
+                            if s > e {
+                                break;
+                            }
+                        }
+                        time = s;
+                    } else {
+                        break;
+                    }
+                }
+            }
+            let _ = responder.send(ClientboundPacket::InstanceList(ocs));
+        }
     }
 }