Next.js 15: TypeScriptフォームとPrismaとクリーンアーキテクチャ 🚀

1// src/core/domain/models/padawan.ts
2export type PrimarySkill = "combat" | "healing" | "meditation" | "telepathy";
3
4export interface Padawan {
5  id?: string;
6  name: string;
7  age: number;
8  midichlorianCount: number;
9  homeworld: string;
10  primarySkill: PrimarySkill;
11  background: string;
12  createdAt?: Date;
13}
14
15export class Result<T> {
16  private constructor(
17    private readonly _isSuccess: boolean,
18    private readonly value?: T,
19    private readonly error?: string
20  ) {}
21
22  static success<T>(value: T): Result<T> {
23    return new Result<T>(true, value);
24  }
25
26  static failure<T>(error: string): Result<T> {
27    return new Result<T>(false, undefined, error);
28  }
29
30  getError(): string | undefined {
31    return this.error;
32  }
33
34  getValue(): T | undefined {
35    return this.value;
36  }
37
38  isSuccess(): boolean {
39    return this._isSuccess;
40  }
41}

1// src/core/domain/events/padawan-registered.ts
2export interface DomainEvent {
3  occurredOn: Date;
4}
5
6export class PadawanRegistered implements DomainEvent {
7  occurredOn: Date = new Date();
8
9  constructor(
10    public readonly padawanId: string,
11    public readonly name: string,
12    public readonly midichlorianCount: number
13  ) {}
14}

1// src/core/domain/ports/padawan-repository.ts
2import { Padawan, Result } from "@/core/domain/models/padawan";
3
4export interface PadawanRepository {
5  save(padawan: Omit<Padawan, "id" | "createdAt">): Promise<Result<Padawan>>;
6  findById(id: string): Promise<Result<Padawan | null>>;
7  findAll(): Promise<Result<Padawan[]>>;
8}

1// src/core/domain/services/padawan-eligibility.ts
2import { Padawan, Result } from "@/core/domain/models/padawan";
3
4export class PadawanEligibilityService {
5  static check(padawan: Omit<Padawan, "id" | "createdAt">): Result<void> {
6    if (padawan.age < 4) {
7      return Result.failure("訓練を始めるには若すぎます");
8    }
9    if (padawan.age > 30) {
10      return Result.failure("評議会は訓練開始の年齢制限をこれに設定しています");
11    }
12
13    if (padawan.midichlorianCount < 7000) {
14      return Result.failure("ミディクロリアン値がジェダイ訓練には低すぎます");
15    }
16    if (padawan.midichlorianCount > 20000) {
17      return Result.failure("不自然なミディクロリアン値です");
18    }
19
20    if (padawan.background.length < 20) {
21      return Result.failure("個人の物語についてもっと詳しく教えてください");
22    }
23
24    return Result.success(void 0);
25  }
26}

1// src/core/usecases/register-padawan.ts
2import { Padawan, Result } from "@/core/domain/models/padawan";
3import { PadawanRepository } from "@/core/domain/ports/padawan-repository";
4import { PadawanEligibilityService } from "@/core/domain/services/padawan-eligibility";
5import { PadawanRegistered } from "@/core/domain/events/padawan-registered";
6import { EventDispatcher } from "@/core/domain/ports/event-dispatcher";
7
8export class RegisterPadawanUseCase {
9  constructor(
10    private readonly padawanRepository: PadawanRepository,
11    private readonly eventDispatcher: EventDispatcher
12  ) {}
13
14  async execute(
15    padawan: Omit<Padawan, "id" | "createdAt">
16  ): Promise<Result<Padawan>> {
17    const eligibilityResult = PadawanEligibilityService.check(padawan);
18    if (!eligibilityResult.isSuccess()) {
19      return Result.failure(eligibilityResult.getError()!);
20    }
21
22    const saveResult = await this.padawanRepository.save(padawan);
23    if (!saveResult.isSuccess()) {
24      return Result.failure(saveResult.getError()!);
25    }
26
27    const savedPadawan = saveResult.getValue()!;
28
29    await this.eventDispatcher.dispatch(
30      new PadawanRegistered(
31        savedPadawan.id!,
32        savedPadawan.name,
33        savedPadawan.midichlorianCount
34      )
35    );
36
37    return Result.success(savedPadawan);
38  }
39}

1// src/infrastructure/db/repositories/prisma-padawan-repository.ts
2import { Padawan, Result } from "@/core/domain/models/padawan";
3import { PadawanRepository } from "@/core/domain/ports/padawan-repository";
4import { prisma } from "@/infrastructure/db/prisma";
5
6export class PrismaPadawanRepository implements PadawanRepository {
7  async save(
8    padawan: Omit<Padawan, "id" | "createdAt">
9  ): Promise<Result<Padawan>> {
10    try {
11      const saved = await prisma.padawan.create({
12        data: padawan,
13      });
14
15      return Result.success(this.mapPrismaPadawanToDomain(saved));
16    } catch (error: unknown) {
17      if (error instanceof Error) {
18        return Result.failure(`保存中にエラーが発生しました: ${error.message}`);
19      }
20      return Result.failure('保存中に不明なエラーが発生しました');
21    }
22  }
23
24  async findById(id: string): Promise<Result<Padawan | null>> {
25    try {
26      const padawan = await prisma.padawan.findUnique({
27        where: { id },
28      });
29
30      return Result.success(
31        padawan ? this.mapPrismaPadawanToDomain(padawan) : null
32      );
33    } catch (error: unknown) {
34      if (error instanceof Error) {
35        return Result.failure(`検索中にエラーが発生しました: ${error.message}`);
36      }
37      return Result.failure('検索中に不明なエラーが発生しました');
38    }
39  }
40
41  async findAll(): Promise<Result<Padawan[]>> {
42    try {
43      const padawans = await prisma.padawan.findMany({
44        orderBy: { createdAt: "desc" },
45      });
46
47      return Result.success(padawans.map(this.mapPrismaPadawanToDomain));
48    } catch (error: unknown) {
49      if (error instanceof Error) {
50        return Result.failure(`取得中にエラーが発生しました: ${error.message}`);
51      }
52      return Result.failure('取得中に不明なエラーが発生しました');
53    }
54  }
55
56  private mapPrismaPadawanToDomain(padawan: any): Padawan {
57    return {
58      id: padawan.id,
59      name: padawan.name,
60      age: padawan.age,
61      midichlorianCount: padawan.midichlorianCount,
62      homeworld: padawan.homeworld,
63      primarySkill: padawan.primarySkill,
64      background: padawan.background,
65      createdAt: padawan.createdAt,
66    };
67  }
68}

1// src/core/domain/validation/padawan-schema.ts
2import { z } from "zod";
3
4export const padawanSchema = z.object({
5  name: z
6    .string()
7    .min(2, "パダワンの名前は2文字以上である必要があります")
8    .max(50, "クワイ＝ガン・ジンでさえそんなに長い名前ではありません"),
9  age: z.coerce
10    .number()
11    .min(4, "グローグュでさえ4歳から訓練を始めました")
12    .max(30, "評議会はこれを訓練開始の年齢制限としています"),
13  midichlorianCount: z.coerce
14    .number()
15    .min(7000, "ミディクロリアン値がジェダイ訓練には低すぎます")
16    .max(20000, "アナキンでさえミディクロリアン値は20000でした"),
17  homeworld: z
18    .string()
19    .min(2, "惑星名は必須です"),
20  primarySkill: z.enum(["combat", "healing", "meditation", "telepathy"], {
21    errorMap: () => ({
22      message: "このスキルはジェダイ・オーダーに認められていません",
23    }),
24  }),
25  background: z
26    .string()
27    .min(20, "あなたの旅についてもっと教えてください"),
28});
29
30export type PadawanFormData = z.infer<typeof padawanSchema>;

1// src/app/actions/register-padawan.ts
2'use server'
3
4import { PrismaPadawanRepository } from '@/infrastructure/db/repositories/prisma-padawan-repository';
5import { ConsoleEventDispatcher } from '@/infrastructure/services/event-dispatcher';
6import { RegisterPadawanUseCase } from '@/core/usecases/register-padawan';
7import { padawanSchema } from '@/core/domain/validation/padawan-schema';
8import { revalidatePath } from 'next/cache';
9
10const padawanRepository = new PrismaPadawanRepository();
11const eventDispatcher = new ConsoleEventDispatcher();
12const registerPadawan = new RegisterPadawanUseCase(
13  padawanRepository,
14  eventDispatcher
15);
16
17export async function handlePadawanRegistration(formData: FormData) {
18  try {
19    const validatedData = padawanSchema.parse(Object.fromEntries(formData));
20    const result = await registerPadawan.execute(validatedData);
21
22    if (!result.isSuccess()) {
23      return {
24        success: false,
25        message: result.getError()
26      };
27    }
28
29    revalidatePath('/');
30    return {
31      success: true,
32      message: "フォースと共にあらんことを、若きパダワン！ 🌟"
33    };
34  } catch (error) {
35    return {
36      success: false,
37      message: "フォースの乱れを感じる... 🌀"
38    };
39  }
40}

1// src/app/components/jedi-form.tsx
2"use client";
3
4import { useForm } from "react-hook-form";
5import { zodResolver } from "@hookform/resolvers/zod";
6import { useToast } from "@/hooks/use-toast";
7
8import {
9  Form,
10  FormControl,
11  FormField,
12  FormItem,
13  FormLabel,
14  FormMessage,
15} from "@/components/ui/form";
16import {
17  Card,
18  CardHeader,
19  CardTitle,
20  CardDescription,
21  CardContent,
22} from "@/components/ui/card";
23import { Input } from "@/components/ui/input";
24import { Button } from "@/components/ui/button";
25import { Textarea } from "@/components/ui/textarea";
26import {
27  Select,
28  SelectContent,
29  SelectItem,
30  SelectTrigger,
31  SelectValue,
32} from "@/components/ui/select";
33import {
34  padawanSchema,
35  type PadawanFormData,
36} from "@/core/domain/validation/padawan-schema";
37import { handlePadawanRegistration } from "../actions/register-padawan";
38
39export function JediRegistrationForm() {
40  const { toast } = useToast();
41  const form = useForm<PadawanFormData>({
42    resolver: zodResolver(padawanSchema),
43    defaultValues: {
44      name: "",
45      age: 0,
46      midichlorianCount: 7000,
47      homeworld: "",
48      primarySkill: "combat",
49      background: "",
50    },
51  });
52
53  async function onSubmit(data: PadawanFormData) {
54    const formData = new FormData();
55    Object.entries(data).forEach(([key, value]) => {
56      formData.append(key, value.toString());
57    });
58
59    const result = await handlePadawanRegistration(formData);
60
61    toast({
62      title: result.success ? "登録成功" : "エラー",
63      description: result.message,
64      variant: result.success ? "default" : "destructive",
65    });
66
67    if (result.success) {
68      form.reset();
69    }
70  }
71
72  return (
73    <Card className="w-full max-w-md mx-auto">
74      <CardHeader>
75        <CardTitle>ジェダイ・アカデミー</CardTitle>
76        <CardDescription>
77          オーダーへの入学申請を提出してください
78        </CardDescription>
79      </CardHeader>
80      <CardContent>
81        <Form {...form}>
82          <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
83            <FormField
84              control={form.control}
85              name="name"
86              render={({ field }) => (
87                <FormItem>
88                  <FormLabel>パダワン名</FormLabel>
89                  <FormControl>
90                    <Input placeholder="ルーク・スカイウォーカー" {...field} />
91                  </FormControl>
92                  <FormMessage />
93                </FormItem>
94              )}
95            />
96
97            <FormField
98              control={form.control}
99              name="age"
100              render={({ field }) => (
101                <FormItem>
102                  <FormLabel>年齢</FormLabel>
103                  <FormControl>
104                    <Input
105                      type="number"
106                      min="4"
107                      max="30"
108                      placeholder="19"
109                      {...field}
110                      onChange={(e) => field.onChange(parseInt(e.target.value))}
111                    />
112                  </FormControl>
113                  <FormMessage />
114                </FormItem>
115              )}
116            />
117
118            <FormField
119              control={form.control}
120              name="midichlorianCount"
121              render={({ field }) => (
122                <FormItem>
123                  <FormLabel>ミディクロリアン値</FormLabel>
124                  <FormControl>
125                    <Input
126                      type="number"
127                      min="7000"
128                      max="20000"
129                      step="100"
130                      {...field}
131                      onChange={(e) => field.onChange(parseInt(e.target.value))}
132                    />
133                  </FormControl>
134                  <FormMessage />
135                </FormItem>
136              )}
137            />
138
139            <FormField
140              control={form.control}
141              name="homeworld"
142              render={({ field }) => (
143                <FormItem>
144                  <FormLabel>出身惑星</FormLabel>
145                  <FormControl>
146                    <Input placeholder="タトゥイーン" {...field} />
147                  </FormControl>
148                  <FormMessage />
149                </FormItem>
150              )}
151            />
152
153            <FormField
154              control={form.control}
155              name="primarySkill"
156              render={({ field }) => (
157                <FormItem>
158                  <FormLabel>主要スキル</FormLabel>
159                  <Select
160                    onValueChange={field.onChange}
161                    defaultValue={field.value}
162                  >
163                    <FormControl>
164                      <SelectTrigger>
165                        <SelectValue placeholder="スキルを選択" />
166                      </SelectTrigger>
167                    </FormControl>
168                    <SelectContent>
169                      <SelectItem value="combat">
170                        ライトセーバー戦闘 ⚔️
171                      </SelectItem>
172                      <SelectItem value="healing">
173                        フォースヒーリング 💚
174                      </SelectItem>
175                      <SelectItem value="meditation">
176                        深い瞑想 🧘
177                      </SelectItem>
178                      <SelectItem value="telepathy">テレパシー 🧠</SelectItem>
179                    </SelectContent>
180                  </Select>
181                  <FormMessage />
182                </FormItem>
183              )}
184            />
185
186            <FormField
187              control={form.control}
188              name="background"
189              render={({ field }) => (
190                <FormItem>
191                  <FormLabel>あなたの物語</FormLabel>
192                  <FormControl>
193                    <Textarea
194                      placeholder="あなたの旅について教えてください..."
195                      className="resize-none"
196                      rows={4}
197                      {...field}
198                    />
199                  </FormControl>
200                  <FormMessage />
201                </FormItem>
202              )}
203            />
204
205            <Button type="submit" className="w-full">
206              申請を提出する 🌟
207            </Button>
208          </form>
209        </Form>
210      </CardContent>
211    </Card>
212  );
213}

1// src/app/components/padawan-list.tsx
2"use client";
3
4import {
5  Table,
6  TableBody,
7  TableCaption,
8  TableCell,
9  TableHead,
10  TableHeader,
11  TableRow,
12} from "@/components/ui/table";
13import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card";
14import { format } from "date-fns";
15import { enUS } from "date-fns/locale";
16import type { Padawan } from "@/core/domain/models/padawan";
17
18type PadawanListProps = {
19  padawans: Padawan[];
20};
21
22const skillEmoji = {
23  combat: "⚔️ ライトセーバー戦闘",
24  healing: "💚 フォースヒーリング",
25  meditation: "🧘 深い瞑想",
26  telepathy: "🧠 テレパシー",
27} as const;
28
29export function PadawanList({ padawans }: PadawanListProps) {
30  if (padawans.length === 0) {
31    return (
32      <Card>
33        <CardContent className="pt-6">
34          <p className="text-center text-muted-foreground">
35            まだパダワンの登録がありません...
36          </p>
37        </CardContent>
38      </Card>
39    );
40  }
41
42  return (
43    <Card>
44      <CardHeader>
45        <CardTitle>候補者リスト</CardTitle>
46      </CardHeader>
47      <CardContent>
48        <Table>
49          <TableHeader>
50            <TableRow>
51              <TableHead>名前</TableHead>
52              <TableHead>年齢</TableHead>
53              <TableHead>出身惑星</TableHead>
54              <TableHead>専門</TableHead>
55              <TableHead>ミディクロリアン値</TableHead>
56              <TableHead>登録日時</TableHead>
57            </TableRow>
58          </TableHeader>
59          <TableBody>
60            {padawans.map((padawan) => (
61              <TableRow key={padawan.id}>
62                <TableCell className="font-medium">{padawan.name}</TableCell>
63                <TableCell>{padawan.age}歳</TableCell>
64                <TableCell>{padawan.homeworld}</TableCell>
65                <TableCell>{skillEmoji[padawan.primarySkill]}</TableCell>
66                <TableCell>
67                  {padawan.midichlorianCount.toLocaleString()}
68                </TableCell>
69                <TableCell>
70                  {format(new Date(padawan.createdAt!), "Pp", { locale: enUS })}
71                </TableCell>
72              </TableRow>
73            ))}
74          </TableBody>
75        </Table>
76      </CardContent>
77    </Card>
78  );
79}

1// Redisキャッシュ実装例
2export class RedisPadawanCache {
3  async cacheResults(key: string, data: any): Promise<void> {
4    await redis.set(key, JSON.stringify(data), "EX", 3600);
5  }
6}

1// モニタリングサービス
2export class ApplicationMonitoring {
3  trackDomainEvent(event: DomainEvent): void {
4    // モニタリングサービスに送信
5  }
6}