Added PlayerJobJoinEvent and PlayerJobLeaveEvent

eco-core/core-plugin/src/main/kotlin/com/willfp/ecojobs/api/event/PlayerJobJoinEvent.kt

@@ -0,0 +1,30 @@
+package com.willfp.ecojobs.api.event
+
+import com.willfp.ecojobs.jobs.Job
+import org.bukkit.entity.Player
+import org.bukkit.event.Cancellable
+import org.bukkit.event.HandlerList
+import org.bukkit.event.player.PlayerEvent
+
+class PlayerJobJoinEvent(
+    who: Player,
+    val job: Job,
+    val oldJob: Job?
+) : PlayerEvent(who), Cancellable {
+    private var cancelled = false
+
+    override fun isCancelled() = this.cancelled
+
+    override fun setCancelled(cancelled: Boolean) {
+        this.cancelled = cancelled
+    }
+
+    override fun getHandlers(): HandlerList {
+        return handlerList
+    }
+
+    companion object {
+        @JvmStatic
+        val handlerList = HandlerList()
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/ecojobs/api/event/PlayerJobLeaveEvent.kt

@@ -0,0 +1,29 @@
+package com.willfp.ecojobs.api.event
+
+import com.willfp.ecojobs.jobs.Job
+import org.bukkit.entity.Player
+import org.bukkit.event.Cancellable
+import org.bukkit.event.HandlerList
+import org.bukkit.event.player.PlayerEvent
+
+class PlayerJobLeaveEvent(
+    who: Player,
+    val job: Job
+) : PlayerEvent(who), Cancellable {
+    private var cancelled = false
+
+    override fun isCancelled() = this.cancelled
+
+    override fun setCancelled(cancelled: Boolean) {
+        this.cancelled = cancelled
+    }
+
+    override fun getHandlers(): HandlerList {
+        return handlerList
+    }
+
+    companion object {
+        @JvmStatic
+        val handlerList = HandlerList()
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/ecojobs/jobs/Job.kt

@@ -15,6 +15,8 @@ import com.willfp.eco.util.formatEco
 import com.willfp.eco.util.toNiceString
 import com.willfp.ecojobs.EcoJobsPlugin
 import com.willfp.ecojobs.api.event.PlayerJobExpGainEvent
+import com.willfp.ecojobs.api.event.PlayerJobJoinEvent
+import com.willfp.ecojobs.api.event.PlayerJobLeaveEvent
 import com.willfp.ecojobs.api.event.PlayerJobLevelUpEvent
 import com.willfp.libreforge.conditions.Conditions
 import com.willfp.libreforge.conditions.ConfiguredCondition
@@ -365,7 +367,33 @@ private val activeJobKey: PersistentDataKey<String> = PersistentDataKey(
 
 var OfflinePlayer.activeJob: Job?
     get() = Jobs.getByID(this.profile.read(activeJobKey))
-    set(value) = this.profile.write(activeJobKey, value?.id ?: "")
+    set(job) {
+        val oldJob = this.activeJob
+
+        if (oldJob != job) {
+            // Have to check for oldJob too to have null safety
+            if (job == null && oldJob != null) {
+                val event = PlayerJobLeaveEvent(player, oldJob)
+                Bukkit.getPluginManager().callEvent(event)
+
+                if (event.isCancelled) {
+                    return
+                }
+            }
+
+            // Not using else because null safety as well
+            if (job != null) {
+                val event = PlayerJobJoinEvent(player, job, oldJob)
+                Bukkit.getPluginManager().callEvent(event)
+
+                if (event.isCancelled) {
+                    return
+                }
+            }
+        }
+
+        this.profile.write(activeJobKey, job?.id ?: "")
+    }
 
 val OfflinePlayer.activeJobLevel: JobLevel?
     get() {