Initial commit

prisma/schema.prisma

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+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+enum Role {
+  ADMIN
+  FINANCE
+  MEMBER
+}
+
+enum ApprovalType {
+  CHAIR_A
+  CHAIR_B
+  FINANCE
+}
+
+enum ApprovalStatus {
+  PENDING
+  APPROVED
+}
+
+enum ExpenseRecurrence {
+  NONE
+  MONTHLY
+}
+
+model User {
+  id                 String        @id @default(cuid())
+  name               String
+  username           String        @unique
+  email              String?       @unique
+  passwordHash       String        @map("password_hash")
+  role               Role
+  approvalPreference ApprovalType? @map("approval_preference")
+  workingGroupId     String?       @map("working_group_id")
+  workingGroup       WorkingGroup? @relation(fields: [workingGroupId], references: [id], onDelete: SetNull)
+  createdExpenses    Expense[]     @relation("ExpenseCreator")
+  approvals          Approval[]
+  auditLogs          AuditLog[]
+  createdAt          DateTime      @default(now()) @map("created_at")
+  updatedAt          DateTime      @updatedAt @map("updated_at")
+
+  @@map("users")
+}
+
+model AccountingPeriod {
+  id        String    @id @default(cuid())
+  name      String    @unique
+  startsAt  DateTime  @map("starts_at")
+  endsAt    DateTime  @map("ends_at")
+  isCurrent Boolean   @default(false) @map("is_current")
+  budgets   Budget[]
+  expenses  Expense[]
+  createdAt DateTime  @default(now()) @map("created_at")
+  updatedAt DateTime  @updatedAt @map("updated_at")
+
+  @@map("accounting_periods")
+}
+
+model WorkingGroup {
+  id        String    @id @default(cuid())
+  name      String    @unique
+  members   User[]
+  budgets   Budget[]
+  expenses  Expense[]
+  createdAt DateTime  @default(now()) @map("created_at")
+  updatedAt DateTime  @updatedAt @map("updated_at")
+
+  @@map("working_groups")
+}
+
+model Budget {
+  id             String       @id @default(cuid())
+  name           String
+  totalBudget    Decimal      @db.Decimal(10, 2) @map("total_budget")
+  colorCode      String       @map("color_code")
+  workingGroupId String       @map("working_group_id")
+  periodId       String       @map("period_id")
+  workingGroup   WorkingGroup @relation(fields: [workingGroupId], references: [id], onDelete: Cascade)
+  period         AccountingPeriod @relation(fields: [periodId], references: [id], onDelete: Restrict)
+  expenses       Expense[]
+  createdAt      DateTime     @default(now()) @map("created_at")
+  updatedAt      DateTime     @updatedAt @map("updated_at")
+
+  @@unique([workingGroupId, periodId, name])
+  @@map("budgets")
+}
+
+model Expense {
+  id             String         @id @default(cuid())
+  title          String
+  description    String?
+  amount         Decimal        @db.Decimal(10, 2)
+  creatorId      String         @map("creator_id")
+  agId           String         @map("ag_id")
+  budgetId       String         @map("budget_id")
+  periodId       String         @map("period_id")
+  approvalStatus ApprovalStatus @default(PENDING) @map("approval_status")
+  recurrence     ExpenseRecurrence @default(NONE)
+  paidAt         DateTime?      @map("paid_at")
+  documentedAt   DateTime?      @map("documented_at")
+  proofUrl       String?        @map("proof_url")
+  createdAt      DateTime       @default(now()) @map("created_at")
+  updatedAt      DateTime       @updatedAt @map("updated_at")
+  creator        User           @relation("ExpenseCreator", fields: [creatorId], references: [id], onDelete: Restrict)
+  workingGroup   WorkingGroup   @relation(fields: [agId], references: [id], onDelete: Cascade)
+  budget         Budget         @relation(fields: [budgetId], references: [id], onDelete: Restrict)
+  period         AccountingPeriod @relation(fields: [periodId], references: [id], onDelete: Restrict)
+  approvals      Approval[]
+
+  @@map("expenses")
+}
+
+model Approval {
+  id           String       @id @default(cuid())
+  expenseId    String       @map("expense_id")
+  userId       String       @map("user_id")
+  approvalType ApprovalType @map("approval_type")
+  timestamp    DateTime     @default(now())
+  expense      Expense      @relation(fields: [expenseId], references: [id], onDelete: Cascade)
+  user         User         @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@unique([expenseId, approvalType])
+  @@map("approvals")
+}
+
+model AuditLog {
+  id          String   @id @default(cuid())
+  actorId     String?  @map("actor_id")
+  actor       User?    @relation(fields: [actorId], references: [id], onDelete: SetNull)
+  action      String
+  entityType  String   @map("entity_type")
+  entityId    String?  @map("entity_id")
+  entityLabel String?  @map("entity_label")
+  summary     String
+  metadata    Json?
+  createdAt   DateTime @default(now()) @map("created_at")
+
+  @@index([createdAt])
+  @@map("audit_logs")
+}