working but imperfect mirror self

scripts/powerEffects.js

@@ -752,6 +752,7 @@ class SummonAllyEffect extends SummonEffect {
     this.biteClaw = !!(this.inputs[this.inputIndex])
     this.combatEdge = !!(this.inputs[this.inputIndex + 1])
     this.flight = !!(this.inputs[this.inputIndex + 2])
+    await this.prepMirrorSelf()
   }
 
   async prepAdditional () {
@@ -830,6 +831,53 @@ class SummonAllyEffect extends SummonEffect {
       log(`Added ${effect.name} to spawn mutation`)
     }
   }
+
+  async prepMirrorSelf () {
+    if (this.actor.name !== 'Mirror Self') {
+      return
+    }
+    const actorDoc = this.token.actor.clone({
+      'system.wildcard': false,
+      'system.fatigue.value': 0,
+      'system.wounds.value': 0,
+      'system.wounds.max': 0,
+      'system.bennies.max': 0,
+      'system.bennies.value': 0
+    })
+    await shim.mergeObject(
+      this.spawnMutation.actor, {
+        name: `Mirrored ${this.token.actor.name}`,
+        img: this.token.actor.img,
+        system: actorDoc.system
+      }, { inplace: true, recursive: true }
+    )
+    await shim.mergeObject(
+      this.spawnMutation.token, {
+        actorLink: false,
+        disposition: this.token.document.disposition,
+        light: this.token.document.light,
+        sight: this.token.document.sight,
+        name: `Mirrored ${this.token.name}`,
+        texture: this.token.document.texture
+      }, { inplace: true, recursive: true })
+    this.spawnMutation.token.texture.scaleX = -1 * this.token.document.texture.scaleX
+    const effectChanges = []
+    for (const item of this.token.actor.items) {
+      this.spawnMutation.embedded.Item[item.name] =
+        this.token.actor.getEmbeddedDocument('Item', item.id)
+      if (item.type === 'skill') {
+        effectChanges.push({
+          key: `@Skill{${item.name}}[system.die.sides]`,
+          mode: CONST.FOUNDRY.ACTIVE_EFFECT_MODES.ADD,
+          value: '-2',
+          priority: 0
+        })
+      }
+    }
+    this.spawnMutation.embedded.ActiveEffect['Mirror Self'] =
+      shim.createEffectDocument(this.ICON, 'Mirror Self',
+        this.durationRounds, effectChanges)
+  }
 }
 
 const PowerClasses = {

scripts/shim.js

@@ -41,6 +41,10 @@ export class shim {
     return game.actors
   }
 
+  static mergeObject (...args) {
+    return mergeObject(...args)
+  }
+
   static getStatus (label, name, favorite = true) {
     const effect = JSON.parse(JSON.stringify(
       CONFIG.statusEffects.find(se => se.label === label)))