batchCooking/apps/api/prisma/schema.prisma

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

// -----------------------------------------------------------------------------
// Users & household
// See specs/batch-cooking-modele.md for the source data model documentation.
// -----------------------------------------------------------------------------

model House {
  id   Int    @id @default(autoincrement())
  name String

  members   UserProfile[]
  plannings Planning[]

  @@map("house")
}

model Diet {
  id   Int    @id @default(autoincrement())
  name String

  users UserProfile[]

  @@map("diet")
}

/// Enumeration-style table, meant to grow over time (e.g. allergy nuances).
model Category {
  id   Int    @id @default(autoincrement())
  name String

  allergies Allergy[]

  @@map("category")
}

model Allergy {
  id         Int @id @default(autoincrement())
  categoryId Int @map("cat_id")

  category Category             @relation(fields: [categoryId], references: [id])
  users    UserProfileAllergy[]

  @@map("allergy")
}

model UserProfile {
  id        Int    @id @default(autoincrement())
  firstName String @map("first_name")
  lastName  String @map("last_name")
  email     String @unique
  houseId   Int?   @map("house_id")
  dietId    Int?   @map("diet_id")

  house     House?               @relation(fields: [houseId], references: [id], onDelete: SetNull)
  diet      Diet?                @relation(fields: [dietId], references: [id], onDelete: SetNull)
  allergies UserProfileAllergy[]

  @@map("user_profiles")
}

/// Explicit join table for the user_profiles <-> allergy association
/// (documented in the spec as a plain many-to-many, no extra fields).
model UserProfileAllergy {
  userProfileId Int @map("user_profile_id")
  allergyId     Int @map("allergy_id")

  userProfile UserProfile @relation(fields: [userProfileId], references: [id], onDelete: Cascade)
  allergy     Allergy     @relation(fields: [allergyId], references: [id], onDelete: Cascade)

  @@id([userProfileId, allergyId])
  @@map("user_profile_allergy")
}

// -----------------------------------------------------------------------------
// Planning
// -----------------------------------------------------------------------------

model Planning {
  id         Int      @id @default(autoincrement())
  startDate  DateTime @map("start_date") @db.Date
  finishDate DateTime @map("finish_date") @db.Date
  houseId    Int      @map("house_id")

  house House          @relation(fields: [houseId], references: [id], onDelete: Cascade)
  items PlanningItem[]

  @@map("planning")
}

model PlanningItem {
  id         Int    @id @default(autoincrement())
  planningId Int    @map("planning_id")
  weekDay    String @map("week_day")
  meal       String
  recipeId   Int    @map("recipe_id")

  planning Planning @relation(fields: [planningId], references: [id], onDelete: Cascade)
  recipe   Recipe   @relation(fields: [recipeId], references: [id])

  @@map("planning_item")
}

// -----------------------------------------------------------------------------
// Recipes
// -----------------------------------------------------------------------------

model Source {
  id   Int     @id @default(autoincrement())
  name String
  url  String?

  recipes Recipe[]

  @@map("sources")
}

model Recipe {
  id          Int     @id @default(autoincrement())
  name        String
  sourceId    Int?    @map("source_id")
  description String?
  picture     String?

  source        Source?            @relation(fields: [sourceId], references: [id], onDelete: SetNull)
  ingredients   RecipeIngredient[]
  steps         Step[]
  planningItems PlanningItem[]
  /// Ingredients for which this recipe is offered as a make-it-yourself alternative.
  alternateFor  Ingredient[]       @relation("IngredientAlternateRecipe")

  @@map("recipe")
}

model Ingredient {
  id                Int     @id @default(autoincrement())
  name              String
  icon              String?
  alternateRecipeId Int?    @map("alternate_recipe")

  alternateRecipe Recipe?            @relation("IngredientAlternateRecipe", fields: [alternateRecipeId], references: [id], onDelete: SetNull)
  recipes         RecipeIngredient[]

  @@map("ingredients")
}

/// recipe <-> ingredients association. The spec documents this as a plain
/// many-to-many, but a shopping list / batch-cooking calculation needs a
/// quantity per recipe, so this join table carries quantity + unit
/// (project decision, not in the original spec doc).
model RecipeIngredient {
  recipeId     Int     @map("recipe_id")
  ingredientId Int     @map("ingredient_id")
  quantity     Decimal @db.Decimal(10, 2)
  unit         String

  recipe     Recipe     @relation(fields: [recipeId], references: [id], onDelete: Cascade)
  ingredient Ingredient @relation(fields: [ingredientId], references: [id], onDelete: Cascade)

  @@id([recipeId, ingredientId])
  @@map("recipe_ingredient")
}

model TechStep {
  id Int @id @default(autoincrement())

  steps    Step[]
  mappings TechStepMapping[]

  @@map("tech_step")
}

/// Used by the recipe-import pipeline to auto-detect which technique a raw
/// instruction step corresponds to (expression = text pattern, weight = match score).
model TechStepMapping {
  id         Int    @id @default(autoincrement())
  techStepId Int    @map("tech_step_id")
  expression String
  weight     Int

  techStep TechStep @relation(fields: [techStepId], references: [id], onDelete: Cascade)

  @@map("tech_step_mapping")
}

/// Modeled as one-to-many (a step belongs to exactly one recipe), not the
/// many-to-many noted in the spec doc: `order` only makes sense scoped to a
/// single recipe, which isn't reconcilable with steps being shared across
/// recipes. See specs/batch-cooking-modele.md for the original wording.
model Step {
  id          Int     @id @default(autoincrement())
  recipeId    Int     @map("recipe_id")
  description String
  picture     String?
  order       Int
  techStepId  Int?    @map("tech_step_id")

  recipe   Recipe    @relation(fields: [recipeId], references: [id], onDelete: Cascade)
  techStep TechStep? @relation(fields: [techStepId], references: [id], onDelete: SetNull)

  @@map("step")
}