Implement human resource domain and features

api/graphql/department.graphqls

@@ -0,0 +1,47 @@
+# Department types and inputs
+
+type Department {
+  id: ID!
+  name: String!
+  description: String!
+  managerId: ID
+  createdAt: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+  updatedAt: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+}
+
+type DepartmentConnection {
+  edges: [DepartmentEdge!]!
+  pageInfo: PageInfo!
+}
+
+type DepartmentEdge {
+  node: Department!
+  cursor: String!
+}
+
+input CreateDepartmentInput {
+  name: String!
+  description: String!
+  managerId: ID
+}
+
+input UpdateDepartmentInput {
+  name: String
+  description: String
+  managerId: ID
+}
+
+type CreateDepartmentPayload {
+  department: Department!
+  errors: [Error!]
+}
+
+type UpdateDepartmentPayload {
+  department: Department!
+  errors: [Error!]
+}
+
+type DeleteDepartmentPayload {
+  success: Boolean!
+  errors: [Error!]
+}

api/graphql/leave.graphqls

@@ -0,0 +1,74 @@
+# Leave types and inputs
+
+type Leave {
+  id: ID!
+  employeeId: ID!
+  leaveType: String!
+  startDate: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+  endDate: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+  reason: String!
+  status: String!
+  approvedBy: ID
+  approvedAt: String # TODO: Change to Time scalar when custom scalar marshaling is implemented
+  createdAt: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+  updatedAt: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+}
+
+type LeaveConnection {
+  edges: [LeaveEdge!]!
+  pageInfo: PageInfo!
+}
+
+type LeaveEdge {
+  node: Leave!
+  cursor: String!
+}
+
+input CreateLeaveInput {
+  employeeId: ID!
+  leaveType: String!
+  startDate: String!
+  endDate: String!
+  reason: String!
+}
+
+input UpdateLeaveInput {
+  leaveType: String
+  startDate: String
+  endDate: String
+  reason: String
+}
+
+input ApproveLeaveInput {
+  approvedBy: ID!
+}
+
+type CreateLeavePayload {
+  leave: Leave!
+  errors: [Error!]
+}
+
+type UpdateLeavePayload {
+  leave: Leave!
+  errors: [Error!]
+}
+
+type ApproveLeavePayload {
+  leave: Leave!
+  errors: [Error!]
+}
+
+type RejectLeavePayload {
+  leave: Leave!
+  errors: [Error!]
+}
+
+type CancelLeavePayload {
+  leave: Leave!
+  errors: [Error!]
+}
+
+type DeleteLeavePayload {
+  success: Boolean!
+  errors: [Error!]
+}

api/graphql/mutation.graphqls

@@ -1,4 +1,4 @@
-# User and Employee mutations
+# User, Employee, Department, Position, and Leave mutations
 
 type Mutation {
   createUser(input: CreateUserInput!): CreateUserPayload!
@@ -7,4 +7,16 @@ type Mutation {
   createEmployee(input: CreateEmployeeInput!): CreateEmployeePayload!
   updateEmployee(id: ID!, input: UpdateEmployeeInput!): UpdateEmployeePayload!
   deleteEmployee(id: ID!): DeleteEmployeePayload!
+  createDepartment(input: CreateDepartmentInput!): CreateDepartmentPayload!
+  updateDepartment(id: ID!, input: UpdateDepartmentInput!): UpdateDepartmentPayload!
+  deleteDepartment(id: ID!): DeleteDepartmentPayload!
+  createPosition(input: CreatePositionInput!): CreatePositionPayload!
+  updatePosition(id: ID!, input: UpdatePositionInput!): UpdatePositionPayload!
+  deletePosition(id: ID!): DeletePositionPayload!
+  createLeave(input: CreateLeaveInput!): CreateLeavePayload!
+  updateLeave(id: ID!, input: UpdateLeaveInput!): UpdateLeavePayload!
+  approveLeave(id: ID!, input: ApproveLeaveInput!): ApproveLeavePayload!
+  rejectLeave(id: ID!, input: ApproveLeaveInput!): RejectLeavePayload!
+  cancelLeave(id: ID!): CancelLeavePayload!
+  deleteLeave(id: ID!): DeleteLeavePayload!
 }

api/graphql/position.graphqls

@@ -0,0 +1,56 @@
+# Position types and inputs
+
+type Position {
+  id: ID!
+  title: String!
+  description: String!
+  departmentId: ID
+  requirements: String!
+  minSalary: Float!
+  maxSalary: Float!
+  createdAt: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+  updatedAt: String! # TODO: Change to Time scalar when custom scalar marshaling is implemented
+}
+
+type PositionConnection {
+  edges: [PositionEdge!]!
+  pageInfo: PageInfo!
+}
+
+type PositionEdge {
+  node: Position!
+  cursor: String!
+}
+
+input CreatePositionInput {
+  title: String!
+  description: String!
+  departmentId: ID
+  requirements: String!
+  minSalary: Float!
+  maxSalary: Float!
+}
+
+input UpdatePositionInput {
+  title: String
+  description: String
+  departmentId: ID
+  requirements: String
+  minSalary: Float
+  maxSalary: Float
+}
+
+type CreatePositionPayload {
+  position: Position!
+  errors: [Error!]
+}
+
+type UpdatePositionPayload {
+  position: Position!
+  errors: [Error!]
+}
+
+type DeletePositionPayload {
+  success: Boolean!
+  errors: [Error!]
+}

api/graphql/query.graphqls

@@ -1,4 +1,4 @@
-# User and Employee queries
+# User, Employee, Department, Position, and Leave queries
 
 type Query {
   user(id: ID!): User
@@ -7,4 +7,14 @@ type Query {
   employees(first: Int, after: String): EmployeeConnection!
   employeesByDepartment(department: String!, first: Int, after: String): EmployeeConnection!
   employeesByStatus(status: String!, first: Int, after: String): EmployeeConnection!
+  department(id: ID!): Department
+  departments(first: Int, after: String): DepartmentConnection!
+  departmentsByManager(managerId: ID!, first: Int, after: String): DepartmentConnection!
+  position(id: ID!): Position
+  positions(first: Int, after: String): PositionConnection!
+  positionsByDepartment(departmentId: ID!, first: Int, after: String): PositionConnection!
+  leave(id: ID!): Leave
+  leaves(first: Int, after: String): LeaveConnection!
+  leavesByEmployee(employeeId: ID!, first: Int, after: String): LeaveConnection!
+  leavesByStatus(status: String!, first: Int, after: String): LeaveConnection!
 }

internal/application/department/dto.go

@@ -0,0 +1,102 @@
+package department
+
+import (
+	"time"
+)
+
+// DepartmentDTO represents a department data transfer object
+type DepartmentDTO struct {
+	ID          string     `json:"id"`
+	Name        string     `json:"name"`
+	Description string     `json:"description"`
+	ManagerID   *string    `json:"managerId,omitempty"`
+	CreatedAt   time.Time  `json:"createdAt"`
+	UpdatedAt   time.Time  `json:"updatedAt"`
+}
+
+// DepartmentConnectionDTO represents a paginated connection of departments
+type DepartmentConnectionDTO struct {
+	Departments []*DepartmentDTO `json:"departments"`
+	NextCursor  string           `json:"nextCursor"`
+}
+
+// GetDepartmentRequest represents a request to get a department by ID
+type GetDepartmentRequest struct {
+	ID string `json:"id"`
+}
+
+// GetDepartmentResponse represents a response for getting a department
+type GetDepartmentResponse struct {
+	Department *DepartmentDTO `json:"department,omitempty"`
+	Errors     []ErrorDTO     `json:"errors,omitempty"`
+}
+
+// ListDepartmentsRequest represents a request to list departments
+type ListDepartmentsRequest struct {
+	Limit  int    `json:"limit"`
+	Cursor string `json:"cursor,omitempty"`
+}
+
+// ListDepartmentsResponse represents a response for listing departments
+type ListDepartmentsResponse struct {
+	Departments *DepartmentConnectionDTO `json:"departments,omitempty"`
+	Errors      []ErrorDTO               `json:"errors,omitempty"`
+}
+
+// ListDepartmentsByManagerRequest represents a request to list departments by manager
+type ListDepartmentsByManagerRequest struct {
+	ManagerID string `json:"managerId"`
+	Limit     int    `json:"limit"`
+	Cursor    string `json:"cursor,omitempty"`
+}
+
+// ListDepartmentsByManagerResponse represents a response for listing departments by manager
+type ListDepartmentsByManagerResponse struct {
+	Departments *DepartmentConnectionDTO `json:"departments,omitempty"`
+	Errors      []ErrorDTO               `json:"errors,omitempty"`
+}
+
+// CreateDepartmentRequest represents a request to create a department
+type CreateDepartmentRequest struct {
+	Name        string  `json:"name"`
+	Description string  `json:"description"`
+	ManagerID   *string `json:"managerId,omitempty"`
+}
+
+// CreateDepartmentResponse represents a response for creating a department
+type CreateDepartmentResponse struct {
+	Department *DepartmentDTO `json:"department,omitempty"`
+	Errors     []ErrorDTO     `json:"errors,omitempty"`
+}
+
+// UpdateDepartmentRequest represents a request to update a department
+type UpdateDepartmentRequest struct {
+	ID          string  `json:"id"`
+	Name        *string `json:"name,omitempty"`
+	Description *string `json:"description,omitempty"`
+	ManagerID   *string `json:"managerId,omitempty"`
+}
+
+// UpdateDepartmentResponse represents a response for updating a department
+type UpdateDepartmentResponse struct {
+	Department *DepartmentDTO `json:"department,omitempty"`
+	Errors     []ErrorDTO     `json:"errors,omitempty"`
+}
+
+// DeleteDepartmentRequest represents a request to delete a department
+type DeleteDepartmentRequest struct {
+	ID string `json:"id"`
+}
+
+// DeleteDepartmentResponse represents a response for deleting a department
+type DeleteDepartmentResponse struct {
+	Success bool       `json:"success"`
+	Errors  []ErrorDTO `json:"errors,omitempty"`
+}
+
+// ErrorDTO represents an error data transfer object
+type ErrorDTO struct {
+	Message string `json:"message"`
+	Field   string `json:"field,omitempty"`
+	Code    string `json:"code,omitempty"`
+}