Added this_item filter

core/src/main/kotlin/com/willfp/libreforge/filters/Filters.kt

@@ -34,6 +34,7 @@ import com.willfp.libreforge.filters.impl.FilterPotionEffect
 import com.willfp.libreforge.filters.impl.FilterProjectiles
 import com.willfp.libreforge.filters.impl.FilterText
 import com.willfp.libreforge.filters.impl.FilterTextContains
+import com.willfp.libreforge.filters.impl.FilterThisItem
 import com.willfp.libreforge.filters.impl.FilterValueAbove
 import com.willfp.libreforge.filters.impl.FilterValueBelow
 import com.willfp.libreforge.filters.impl.FilterValueEquals
@@ -116,5 +117,6 @@ object Filters : Registry<Filter<*, *>>() {
         register(FilterValueBelow)
         register(FilterIsExpressionTrue)
         register(FilterAdvancements)
+        register(FilterThisItem)
     }
 }

core/src/main/kotlin/com/willfp/libreforge/filters/impl/FilterThisItem.kt

@@ -0,0 +1,17 @@
+package com.willfp.libreforge.filters.impl
+
+import com.willfp.eco.core.config.interfaces.Config
+import com.willfp.libreforge.NoCompileData
+import com.willfp.libreforge.filters.Filter
+import com.willfp.libreforge.getProvider
+import com.willfp.libreforge.triggers.TriggerData
+
+object FilterThisItem : Filter<NoCompileData, Boolean>("this_item") {
+    override fun getValue(config: Config, data: TriggerData?, key: String): Boolean {
+        return config.getBool(key)
+    }
+
+    override fun isMet(data: TriggerData, value: Boolean, compileData: NoCompileData): Boolean {
+        return data.item == data.holder.getProvider()
+    }
+}