From f70bf85ec282441fed148ebd1e72468e000e72a3 Mon Sep 17 00:00:00 2001
From: Edgaru089 <sjs333@outlook.com>
Date: Tue, 2 Apr 2024 09:29:46 +0800
Subject: [PATCH] ToLive misc component

---
 mapper_misc.c | 24 ++++++++++++++++++++++++
 mapper_misc.h | 12 ++++++++++++
 types.c       |  6 ++++++
 types.h       |  1 +
 4 files changed, 43 insertions(+)

diff --git a/mapper_misc.c b/mapper_misc.c
index 68d1364..65d46ca 100644
--- a/mapper_misc.c
+++ b/mapper_misc.c
@@ -28,6 +28,7 @@ void misc_DeleteComponent(Component_Misc *misc) {
 void misc_thinker_HazardRespawn(App *app, Entity *e, Duration deltaTime) {
 	if (!e->misc || !e->misc->respawn) {
 		WARN("called on an entity without misc or misc.respawn", 0);
+		e->thinker = NULL;
 		return;
 	}
 	if (app->player->player == NULL) // No player
@@ -52,6 +53,7 @@ void misc_thinker_HazardRespawn(App *app, Entity *e, Duration deltaTime) {
 void misc_thinker_Hazard(App *app, Entity *e, Duration deltaTime) {
 	if (!e->misc || !e->misc->hazard) {
 		WARN("called on an entity without misc or misc.textbox", 0);
+		e->thinker = NULL;
 		return;
 	}
 	if (app->player->player == NULL) // No player
@@ -72,6 +74,7 @@ void misc_thinker_Hazard(App *app, Entity *e, Duration deltaTime) {
 void misc_thinker_Textbox(App *app, Entity *e, Duration deltaTime) {
 	if (!e->misc || !e->misc->textbox) {
 		WARN("called on an entity without misc or misc.textbox", 0);
+		e->thinker = NULL;
 		return;
 	}
 	misc_Textbox *t = e->misc->textbox;
@@ -94,6 +97,19 @@ void misc_thinker_Textbox(App *app, Entity *e, Duration deltaTime) {
 		t->progress = fmaxf(0.0f, t->progress - duration_Seconds(deltaTime) * MISC_TEXTBOX_FADEIN_SPEED);
 }
 
+void misc_thinker_ToLive(App *app, Entity *e, Duration deltaTime) {
+	if (!e->misc || e->misc->tolive.microseconds == 0) {
+		WARN("called on an entity without misc or misc.tolive", 0);
+		e->thinker = NULL;
+		return;
+	}
+
+	if (e->misc->tolive.microseconds < time_Now().microseconds) {
+		// After its allocated time
+		entity_Delete(app->entity, e->id);
+	}
+}
+
 
 // Utility functions for creating misc entities
 void misc_InstantiateTextbox(App *app, Entity *e, const char *text, Box2 trigger_box, float offset) {
@@ -131,3 +147,11 @@ void misc_InstantiateHazard(App *app, Entity *e, Box2 trigger_box) {
 
 	e->thinker = &misc_thinker_Hazard;
 }
+
+void misc_InstantiateToLive(App *app, Entity *e, Duration duration, TimePoint since) {
+	ASSERT(e->misc == NULL && "Instantiate must be called with e.misc not set");
+	e->misc         = zero_malloc(sizeof(Component_Misc));
+	e->misc->tolive = time_After(since, duration);
+
+	e->thinker = &misc_thinker_ToLive;
+}
diff --git a/mapper_misc.h b/mapper_misc.h
index 80c424a..c42aac2 100644
--- a/mapper_misc.h
+++ b/mapper_misc.h
@@ -43,6 +43,10 @@ void misc_thinker_HazardRespawn(App *app, Entity *e, Duration deltaTime);
 // Tracks the player & harms on contact
 void misc_thinker_Hazard(App *app, Entity *e, Duration deltaTime);
 
+// Thinker for tolive
+// Kills itself after some time
+void misc_thinker_ToLive(App *app, Entity *e, Duration deltaTime);
+
 
 // Misc data an entity in the map might want.
 // Used as patches for quick logic like hazard respawn & textbox
@@ -50,6 +54,7 @@ typedef struct {
 	misc_Textbox       *textbox;
 	misc_HazardRespawn *respawn;
 	Box2               *hazard; // Harms the player on contact if not null, relative
+	TimePoint           tolive; // Deletes itself after this time if it is not 0
 } Component_Misc;
 
 // Deletes everything nested in misc, and then itself.
@@ -68,6 +73,13 @@ void misc_InstantiateHazardRespawn(App *app, Entity *e, Box2 trigger_box, Vec2 r
 // Creates misc & sets the thinker.
 void misc_InstantiateHazard(App *app, Entity *e, Box2 trigger_box);
 
+// Inserts the components for the entity to kill itself after some time.
+// Creates misc & sets the thinker.
+//
+// You would normally want to set duration to a fixed amount,
+// and since to time_Now().
+void misc_InstantiateToLive(App *app, Entity *e, Duration duration, TimePoint since);
+
 
 static inline Box2 misc_TextboxUpright(double width, double height) {
 	Box2 b = {
diff --git a/types.c b/types.c
index 67ee331..fa294f1 100644
--- a/types.c
+++ b/types.c
@@ -170,6 +170,12 @@ TimePoint time_Now() {
 	return t;
 }
 
+TimePoint time_After(TimePoint now, Duration after) {
+	TimePoint p = {
+		.microseconds = now.microseconds + after.microseconds};
+	return p;
+}
+
 Duration time_Since(TimePoint prev) {
 	return time_Difference(time_Now(), prev);
 }
diff --git a/types.h b/types.h
index 16148a0..c040baa 100644
--- a/types.h
+++ b/types.h
@@ -107,6 +107,7 @@ typedef struct {
 } TimePoint;
 
 TimePoint time_Now();
+TimePoint time_After(TimePoint now, Duration after);
 Duration  time_Since(TimePoint prev);
 Duration  time_Difference(TimePoint now, TimePoint prev);
 Duration  time_Reset(TimePoint *prev);