Refactor to using injectable for dependency injection

Co-authored-by: Janne Savolainen <janne.savolainen@live.fi>

Signed-off-by: Iku-turso <mikko.aspiala@gmail.com>

packages/kata-for-gabriel/src/cast-die.ts

@@ -0,0 +1,9 @@
+import { getInjectable } from "@ogre-tools/injectable";
+
+const castDieInjectable = getInjectable({
+  id: "cast-die",
+  instantiate: () => () => Promise.resolve(0),
+  causesSideEffects: true,
+});
+
+export default castDieInjectable;

packages/kata-for-gabriel/src/handle-attack-on-monster-for.ts

@@ -1,19 +1,19 @@
-import type { Monster } from "./handle-landed-hit-on-monster-for";
-import type { Dependencies } from "./monster-beatdown";
+import { getInjectable } from "@ogre-tools/injectable";
+import messageToPlayerInjectable from "./message-to-player";
+import castDieInjectable from "./cast-die";
+import monsterInjectable from "./monster";
+import handleLandedHitOnMonsterInjectable from "./handle-landed-hit-on-monster-for";
 
-export const handleAttackOnMonsterFor =
-  ({
-     monster,
-     messageToPlayer,
-     handleLandedHitOnMonster,
-     castDie,
-   }: {
-    monster: Monster;
-    messageToPlayer: Dependencies["messageToPlayer"];
-    handleLandedHitOnMonster: () => { monsterIsDead: boolean };
-    castDie: () => Promise<number>;
-  }) =>
-    async () => {
+const handleAttackOnMonsterInjectable = getInjectable({
+  id: "handle-attack-on-monster",
+
+  instantiate: (di) => {
+    const messageToPlayer = di.inject(messageToPlayerInjectable);
+    const castDie = di.inject(castDieInjectable);
+    const handleLandedHitOnMonster = di.inject(handleLandedHitOnMonsterInjectable);
+    const monster = di.inject(monsterInjectable);
+
+    return async () => {
       messageToPlayer("You attack the monster.");
 
       const dieResult = await castDie();
@@ -32,3 +32,7 @@ export const handleAttackOnMonsterFor =
 
       return { gameIsOver: false };
     };
+  },
+});
+
+export default handleAttackOnMonsterInjectable;

packages/kata-for-gabriel/src/handle-attacking-the-monster-again-for.ts

@@ -1,25 +1,30 @@
-import type { Dependencies } from "./monster-beatdown";
+import { getInjectable } from "@ogre-tools/injectable";
+import questionToPlayerInjectable from "./question-to-player";
+import messageToPlayerInjectable from "./message-to-player";
 
-export const handleAttackingTheMonsterAgainFor =
-  ({
-    messageToPlayer,
-    questionToPlayer,
-  }: {
-    messageToPlayer: Dependencies["messageToPlayer"];
-    questionToPlayer: Dependencies["questionToPlayer"];
-  }) =>
-  async () => {
-    const playerWantsToAttackAgain = await questionToPlayer("Do you want to attack again?");
+const handleAttackingTheMonsterAgainInjectable = getInjectable({
+  id: "handle-attacking-the-monster-again",
 
-    if (playerWantsToAttackAgain) {
-      return { gameIsOver: false };
-    }
+  instantiate: (di) => {
+    const questionToPlayer = di.inject(questionToPlayerInjectable);
+    const messageToPlayer = di.inject(messageToPlayerInjectable);
 
-    messageToPlayer(
-      "You lose your nerve mid-beat-down, and try to run away. You get eaten by a sad, disappointed monster.",
-    );
+    return async () => {
+      const playerWantsToAttackAgain = await questionToPlayer("Do you want to attack again?");
 
-    messageToPlayer("You lose. Game over!");
+      if (playerWantsToAttackAgain) {
+        return { gameIsOver: false };
+      }
 
-    return { gameIsOver: true };
-  };
+      messageToPlayer(
+        "You lose your nerve mid-beat-down, and try to run away. You get eaten by a sad, disappointed monster.",
+      );
+
+      messageToPlayer("You lose. Game over!");
+
+      return { gameIsOver: true };
+    };
+  },
+});
+
+export default handleAttackingTheMonsterAgainInjectable;

packages/kata-for-gabriel/src/handle-initial-monster-encounter-for.ts

@@ -1,17 +1,17 @@
-import type { Monster } from "./handle-landed-hit-on-monster-for";
-import type { Dependencies } from "./monster-beatdown";
+import { getInjectable } from "@ogre-tools/injectable";
+import messageToPlayerInjectable from "./message-to-player";
+import questionToPlayerInjectable from "./question-to-player";
+import monsterInjectable from "./monster";
 
-export const handleInitialMonsterEncounterFor =
-  ({
-     monster,
-     messageToPlayer,
-     questionToPlayer,
-   }: {
-    monster: Monster;
-    messageToPlayer: Dependencies["messageToPlayer"];
-    questionToPlayer: Dependencies["questionToPlayer"];
-  }) =>
-    async () => {
+const handleInitialMonsterEncounterInjectable = getInjectable({
+  id: "handle-initial-monster-encounter",
+
+  instantiate: (di) => {
+    const messageToPlayer = di.inject(messageToPlayerInjectable);
+    const questionToPlayer = di.inject(questionToPlayerInjectable);
+    const monster = di.inject(monsterInjectable);
+
+    return async () => {
       messageToPlayer(`You encounter a monster with ${monster.hitPoints} hit-points`);
 
       const playerWantsToAttack = await questionToPlayer("Attack the monster?");
@@ -27,3 +27,7 @@ export const handleInitialMonsterEncounterFor =
 
       return { gameIsOver: true };
     };
+  },
+});
+
+export default handleInitialMonsterEncounterInjectable;

packages/kata-for-gabriel/src/handle-landed-hit-on-monster-for.ts

@@ -1,18 +1,15 @@
-import type { Dependencies } from "./monster-beatdown";
+import { getInjectable } from "@ogre-tools/injectable";
+import monsterInjectable from "./monster";
+import messageToPlayerInjectable from "./message-to-player";
 
-export type Monster = {
-  hitPoints: number;
-};
+const handleLandedHitOnMonsterInjectable = getInjectable({
+  id: "handle-landed-hit-on-monster",
 
-export const handleLandedHitOnMonsterFor =
-  ({
-     monster,
-     messageToPlayer,
-   }: {
-    monster: Monster;
-    messageToPlayer: Dependencies["messageToPlayer"];
-  }) =>
-    () => {
+  instantiate: (di) => {
+    const monster = di.inject(monsterInjectable);
+    const messageToPlayer = di.inject(messageToPlayerInjectable);
+
+    return () => {
       monster.hitPoints--;
 
       if (monster.hitPoints) {
@@ -31,3 +28,7 @@ export const handleLandedHitOnMonsterFor =
 
       return { monsterIsDead: true };
     };
+  },
+});
+
+export default handleLandedHitOnMonsterInjectable;

packages/kata-for-gabriel/src/message-to-player.ts

@@ -0,0 +1,9 @@
+import { getInjectable } from "@ogre-tools/injectable";
+
+const messageToPlayerInjectable = getInjectable({
+  id: "message-to-player",
+  instantiate: () => (message: string) => {},
+  causesSideEffects: true,
+});
+
+export default messageToPlayerInjectable;

packages/kata-for-gabriel/src/monster-beatdown.test.ts

@@ -1,6 +1,15 @@
-import { createGame, Dependencies } from "./monster-beatdown";
+import { Dependencies, gameInjectable } from "./monster-beatdown";
 import asyncFn, { AsyncFnMock } from "@async-fn/jest";
 import { getPromiseStatus } from "@k8slens/test-utils";
+import { createContainer } from "@ogre-tools/injectable";
+import messageToPlayerInjectable from "./message-to-player";
+import castDieInjectable from "./cast-die";
+import questionToPlayerInjectable from "./question-to-player";
+import handleInitialMonsterEncounterInjectable from "./handle-initial-monster-encounter-for";
+import monsterInjectable from "./monster";
+import handleAttackOnMonsterInjectable from "./handle-attack-on-monster-for";
+import handleLandedHitOnMonsterInjectable from "./handle-landed-hit-on-monster-for";
+import handleAttackingTheMonsterAgainInjectable from "./handle-attacking-the-monster-again-for";
 
 describe("monster-beatdown", () => {
   let game: { start: () => Promise<void> };
@@ -10,15 +19,29 @@ describe("monster-beatdown", () => {
   let gamePromise: Promise<void>;
 
   beforeEach(() => {
+    const di = createContainer("monster-beatdown");
+
+    di.register(
+      castDieInjectable,
+      gameInjectable,
+      handleAttackOnMonsterInjectable,
+      handleAttackingTheMonsterAgainInjectable,
+      handleInitialMonsterEncounterInjectable,
+      handleLandedHitOnMonsterInjectable,
+      messageToPlayerInjectable,
+      monsterInjectable,
+      questionToPlayerInjectable,
+    );
+
     messageToPlayerMock = jest.fn();
+    di.override(messageToPlayerInjectable, () => messageToPlayerMock);
+    di.override(questionToPlayerInjectable, () => questionToPlayerMock);
+    di.override(castDieInjectable, () => castDieMock);
+
     questionToPlayerMock = asyncFn();
     castDieMock = asyncFn();
 
-    game = createGame({
-      messageToPlayer: messageToPlayerMock,
-      questionToPlayer: questionToPlayerMock,
-      castDie: castDieMock,
-    });
+    game = di.inject(gameInjectable);
   });
 
   describe("when game is not started", () => {

packages/kata-for-gabriel/src/monster-beatdown.ts

@@ -1,7 +1,7 @@
-import { handleLandedHitOnMonsterFor, Monster } from "./handle-landed-hit-on-monster-for";
-import { handleInitialMonsterEncounterFor } from "./handle-initial-monster-encounter-for";
-import { handleAttackOnMonsterFor } from "./handle-attack-on-monster-for";
-import { handleAttackingTheMonsterAgainFor } from "./handle-attacking-the-monster-again-for";
+import { getInjectable } from "@ogre-tools/injectable";
+import handleInitialMonsterEncounterInjectable from "./handle-initial-monster-encounter-for";
+import handleAttackOnMonsterInjectable from "./handle-attack-on-monster-for";
+import handleAttackingTheMonsterAgainInjectable from "./handle-attacking-the-monster-again-for";
 
 export type Dependencies = {
   messageToPlayer: (message: string) => void;
@@ -9,49 +9,33 @@ export type Dependencies = {
   castDie: () => Promise<number>;
 };
 
-const createGame = ({ messageToPlayer, questionToPlayer, castDie }: Dependencies) => {
-  const monster: Monster = { hitPoints: 3 };
+export const gameInjectable = getInjectable({
+  id: "game",
 
-  const handleLandedHitOnMonster = handleLandedHitOnMonsterFor({ messageToPlayer, monster });
+  instantiate: (di) => {
+    const handleInitialMonsterEncounter = di.inject(handleInitialMonsterEncounterInjectable);
+    const handleAttackOnMonster = di.inject(handleAttackOnMonsterInjectable);
+    const handleAttackingTheMonsterAgain = di.inject(handleAttackingTheMonsterAgainInjectable);
 
-  const handleAttackOnMonster = handleAttackOnMonsterFor({
-    monster,
-    messageToPlayer,
-    handleLandedHitOnMonster,
-    castDie,
-  });
-
-  const handleAttackingTheMonsterAgain = handleAttackingTheMonsterAgainFor({
-    messageToPlayer,
-    questionToPlayer,
-  });
-
-  const handleInitialMonsterEncounter = handleInitialMonsterEncounterFor({
-    messageToPlayer,
-    questionToPlayer,
-    monster,
-  });
-
-  return {
-    start: async () => {
-      const initialEncounterResult = await handleInitialMonsterEncounter();
-      if (initialEncounterResult.gameIsOver) {
-        return;
-      }
-
-      while (true) {
-        const attackResult = await handleAttackOnMonster();
-        if (attackResult.gameIsOver) {
+    return {
+      start: async () => {
+        const initialEncounterResult = await handleInitialMonsterEncounter();
+        if (initialEncounterResult.gameIsOver) {
           return;
         }
 
-        const attackAgainResult = await handleAttackingTheMonsterAgain();
-        if (attackAgainResult.gameIsOver) {
-          return;
-        }
-      }
-    },
-  };
-};
+        while (true) {
+          const attackResult = await handleAttackOnMonster();
+          if (attackResult.gameIsOver) {
+            return;
+          }
 
-export { createGame };
+          const attackAgainResult = await handleAttackingTheMonsterAgain();
+          if (attackAgainResult.gameIsOver) {
+            return;
+          }
+        }
+      },
+    };
+  },
+});

packages/kata-for-gabriel/src/monster.ts

@@ -0,0 +1,8 @@
+import { getInjectable } from "@ogre-tools/injectable";
+
+const monsterInjectable = getInjectable({
+  id: "monster",
+  instantiate: () => ({ hitPoints: 3 }),
+});
+
+export default monsterInjectable;

packages/kata-for-gabriel/src/question-to-player.ts

@@ -0,0 +1,9 @@
+import { getInjectable } from "@ogre-tools/injectable";
+
+const questionToPlayerInjectable = getInjectable({
+  id: "question-to-player",
+  instantiate: () => (question: string) => Promise.resolve(true),
+  causesSideEffects: true,
+});
+
+export default questionToPlayerInjectable;