From c558e3645f5154ee001e5ba8b295556316356ab0 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sat, 3 Sep 2016 18:38:32 +0300
Subject: Add support for MinRange in item_db.

If weapon used on range smaller than MinRange, weapon not attacking.
---
 src/emap/battle.c          | 35 +++++++++++++++++++++++++++++++++++
 src/emap/battle.h          |  4 ++++
 src/emap/data/itemd.c      |  1 +
 src/emap/init.c            |  1 +
 src/emap/itemdb.c          |  3 +++
 src/emap/struct/itemdext.h |  2 ++
 6 files changed, 46 insertions(+)

diff --git a/src/emap/battle.c b/src/emap/battle.c
index 1404795..5a24927 100644
--- a/src/emap/battle.c
+++ b/src/emap/battle.c
@@ -15,6 +15,8 @@
 #include "map/mob.h"
 #include "map/pc.h"
 
+#include "plugins/HPMHooking.h"
+
 #include "emap/data/itemd.h"
 #include "emap/data/mobd.h"
 #include "emap/struct/itemdext.h"
@@ -61,6 +63,8 @@ bool ebattle_check_arrows_post(bool retVal,
             return true;
 
         const int weaponIndex = sd->equip_index[EQI_HAND_L];
+        if (weaponIndex < 0)
+            return true;
 
         struct ItemdExt *data = itemd_get(sd->inventory_data[weaponIndex]);
         if (!data)
@@ -119,3 +123,34 @@ struct Damage ebattle_calc_weapon_attack_post(struct Damage retVal,
     retVal.damage2 = apply_percentrate64(retVal.damage2, mod, 10000);
     return retVal;
 }
+
+enum damage_lv ebattle_weapon_attack_pre(struct block_list **srcPtr,
+                                         struct block_list **targetPtr,
+                                         int64 *tickPtr __attribute__ ((unused)),
+                                         int *flagPtr __attribute__ ((unused)))
+{
+    struct block_list *src = *srcPtr;
+    struct block_list *target = *targetPtr;
+
+    nullpo_retr(ATK_NONE, src);
+    nullpo_retr(ATK_NONE, target);
+
+    struct map_session_data *sd = BL_CAST(BL_PC, src);
+    if (sd == NULL)
+        return ATK_NONE;
+
+    const int weaponIndex = sd->equip_index[EQI_HAND_L];
+    if (weaponIndex < 0)
+        return ATK_NONE;
+
+    struct ItemdExt *data = itemd_get(sd->inventory_data[weaponIndex]);
+    if (!data)
+        return ATK_NONE;
+
+    if (distance_bl(src, target) < data->minRange)
+    {   // if range between player and target > minRange, then dont attack
+        hookStop();
+        return ATK_NONE;
+    }
+    return ATK_NONE;
+}
diff --git a/src/emap/battle.h b/src/emap/battle.h
index 38ce379..17d7ba7 100644
--- a/src/emap/battle.h
+++ b/src/emap/battle.h
@@ -12,5 +12,9 @@ struct Damage ebattle_calc_weapon_attack_post(struct Damage retVal,
                                               uint16 skill_id,
                                               uint16 skill_lv,
                                               int wflag);
+enum damage_lv ebattle_weapon_attack_pre(struct block_list **srcPtr,
+                                         struct block_list **targetPtr,
+                                         int64 *tickPtr,
+                                         int *flagPtr);
 
 #endif  // EVOL_MAP_BATTLE
diff --git a/src/emap/data/itemd.c b/src/emap/data/itemd.c
index e516bcd..f9dde73 100644
--- a/src/emap/data/itemd.c
+++ b/src/emap/data/itemd.c
@@ -75,5 +75,6 @@ struct ItemdExt *itemd_create(void)
     VECTOR_INIT(data->allowedAmmo);
     data->subX = 8;
     data->subY = 8;
+    data->minRange = 0;
     return data;
 }
diff --git a/src/emap/init.c b/src/emap/init.c
index 23a2a88..e6a4113 100644
--- a/src/emap/init.c
+++ b/src/emap/init.c
@@ -201,6 +201,7 @@ HPExport void plugin_init (void)
 
     addHookPre(atcommand, msgfd, eatcommand_msgfd_pre);
     addHookPre(atcommand, msgsd, eatcommand_msgsd_pre);
+    addHookPre(battle, weapon_attack, ebattle_weapon_attack_pre);
     addHookPre(bg, team_warp, ebg_team_warp_pre);
     addHookPre(pc, can_Adopt, epc_can_Adopt_pre);
     addHookPre(pc, adoption, epc_adoption_pre);
diff --git a/src/emap/itemdb.c b/src/emap/itemdb.c
index 366b05d..dc4fd2f 100644
--- a/src/emap/itemdb.c
+++ b/src/emap/itemdb.c
@@ -184,6 +184,9 @@ void eitemdb_readdb_additional_fields_pre(int *itemid,
         }
     }
 
+    if (itemdb->lookup_const(it, "MinRange", &i32))
+        data->minRange = i32;
+
     hookStop();
 }
 
diff --git a/src/emap/struct/itemdext.h b/src/emap/struct/itemdext.h
index 9a428ba..f30d94c 100644
--- a/src/emap/struct/itemdext.h
+++ b/src/emap/struct/itemdext.h
@@ -34,6 +34,8 @@ struct ItemdExt
     int unequipEffect;
     int unequipFailEffect;
 
+    int minRange;
+
     VECTOR_DECL(int) allowedAmmo;
     VECTOR_DECL(struct ItemCardExt) allowedCards;
     struct script_code *dropScript;
-- 
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