Add Psychic Terrain priority block effect and terrain messages

src/data/terrain.ts

@@ -1,3 +1,4 @@
+import Move from "./move";
 import { Type } from "./type";
 
 export enum TerrainType {
@@ -42,6 +43,15 @@ export class Terrain {
 
     return 1;
   }
+
+  isMoveTerrainCancelled(move: Move): boolean {
+    switch (this.terrainType) {
+      case TerrainType.PSYCHIC:
+        return move.priority > 0;
+    }
+
+    return false;
+  }
 }
 
 export function getTerrainColor(terrainType: TerrainType): [ integer, integer, integer ] {

src/data/weather.ts

@@ -194,15 +194,35 @@ export function getWeatherClearMessage(weatherType: WeatherType): string {
 }
 
 export function getTerrainStartMessage(terrainType: TerrainType): string {
-  return terrainType
-    ? `The terrain became ${Utils.toReadableString(TerrainType[terrainType])}!`
-    : null;
+  switch (terrainType) {
+    case TerrainType.MISTY:
+      return 'Mist swirled around the battlefield!';
+    case TerrainType.ELECTRIC:
+      return 'An electric current ran across the battlefield!';
+    case TerrainType.GRASSY:
+      return 'Grass grew to cover the battlefield!';
+    case TerrainType.PSYCHIC:
+      return 'The battlefield got weird!';
+  }
 }
 
 export function getTerrainClearMessage(terrainType: TerrainType): string {
-  return terrainType
-    ? `The ${Utils.toReadableString(TerrainType[terrainType])} terrain faded.`
-    : null;
+  switch (terrainType) {
+    case TerrainType.MISTY:
+      return 'The mist disappeared from the battlefield.';
+    case TerrainType.ELECTRIC:
+      return 'The electricity disappeared from the battlefield.';
+    case TerrainType.GRASSY:
+      return 'The grass disappeared from the battlefield.';
+    case TerrainType.PSYCHIC:
+      return 'The weirdness disappeared from the battlefield!';
+  }
+}
+
+export function getTerrainBlockMessage(pokemon: Pokemon, terrainType: TerrainType): string {
+  if (terrainType === TerrainType.MISTY)
+    return getPokemonMessage(pokemon, ` surrounds itself with a protective mist!`);
+  return getPokemonMessage(pokemon, ` is protected by the ${Utils.toReadableString(TerrainType[terrainType])} Terrain!`);
 }
 
 interface WeatherPoolEntry {