/
task_service.go
186 lines (175 loc) · 4.47 KB
/
task_service.go
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package database
import (
"context"
"errors"
"github.com/JECSand/go-rest-api-boilerplate/models"
"time"
)
// TaskService is used by the app to manage all Task related controllers and functionality
type TaskService struct {
collection DBCollection
db DBClient
taskHandler *DBHandler[*taskModel]
userHandler *DBHandler[*userModel]
groupHandler *DBHandler[*groupModel]
}
// NewTaskService is an exported function used to initialize a new TaskService struct
func NewTaskService(db DBClient, tHandler *DBHandler[*taskModel], uHandler *DBHandler[*userModel], gHandler *DBHandler[*groupModel]) *TaskService {
collection := db.GetCollection("tasks")
return &TaskService{collection, db, tHandler, uHandler, gHandler}
}
// checkLinkedRecords ensures the userId and groupId in the models.Task is correct
func (p *TaskService) checkLinkedRecords(g *groupModel, u *userModel) error {
gOutCh := make(chan *groupModel)
gErrCh := make(chan error)
uOutCh := make(chan *userModel)
uErrCh := make(chan error)
go func() {
reG, err := p.groupHandler.FindOne(g)
gOutCh <- reG
gErrCh <- err
}()
go func() {
reU, err := p.userHandler.FindOne(u)
uOutCh <- reU
uErrCh <- err
}()
for i := 0; i < 4; i++ {
select {
case gOut := <-gOutCh:
g = gOut
case gErr := <-gErrCh:
if gErr != nil {
return errors.New("invalid group id")
}
case uOut := <-uOutCh:
u = uOut
case uErr := <-uErrCh:
if uErr != nil {
return errors.New("invalid user id")
}
}
}
if g.Id != u.GroupId {
return errors.New("task user is not in task group")
}
return nil
}
// TaskCreate is used to create a new user Task
func (p *TaskService) TaskCreate(g *models.Task) (*models.Task, error) {
err := g.Validate("create")
if err != nil {
return nil, err
}
gm, err := newTaskModel(g)
if err != nil {
return nil, err
}
err = p.checkLinkedRecords(&groupModel{Id: gm.GroupId}, &userModel{Id: gm.UserId})
if err != nil {
return nil, err
}
gm.Status = models.NOTSTARTED
gm, err = p.taskHandler.InsertOne(gm)
if err != nil {
return nil, err
}
return gm.toRoot(), err
}
// TasksFind is used to find all Task docs in a MongoDB Collection
func (p *TaskService) TasksFind(g *models.Task) ([]*models.Task, error) {
var tasks []*models.Task
tm, err := newTaskModel(g)
if err != nil {
return tasks, err
}
gms, err := p.taskHandler.FindMany(tm)
if err != nil {
return tasks, err
}
for _, gm := range gms {
tasks = append(tasks, gm.toRoot())
}
return tasks, nil
}
// TaskFind is used to find a specific Task doc
func (p *TaskService) TaskFind(g *models.Task) (*models.Task, error) {
gm, err := newTaskModel(g)
if err != nil {
return nil, err
}
gm, err = p.taskHandler.FindOne(gm)
if err != nil {
return nil, err
}
return gm.toRoot(), err
}
// TaskDelete is used to delete a Task doc
func (p *TaskService) TaskDelete(g *models.Task) (*models.Task, error) {
gm, err := newTaskModel(g)
if err != nil {
return nil, err
}
gm, err = p.taskHandler.DeleteOne(gm)
if err != nil {
return nil, err
}
return gm.toRoot(), err
}
// TaskDeleteMany is used to delete many Tasks
func (p *TaskService) TaskDeleteMany(g *models.Task) (*models.Task, error) {
gm, err := newTaskModel(g)
if err != nil {
return nil, err
}
gm, err = p.taskHandler.DeleteMany(gm)
if err != nil {
return nil, err
}
return gm.toRoot(), err
}
// TaskUpdate is used to update an existing Task
func (p *TaskService) TaskUpdate(g *models.Task) (*models.Task, error) {
var filter models.Task
err := g.Validate("update")
if err != nil {
return nil, err
}
filter.Id = g.Id
f, err := newTaskModel(&filter)
if err != nil {
return nil, err
}
cur, TaskErr := p.taskHandler.FindOne(f)
if TaskErr != nil {
return nil, errors.New("task not found")
}
g.BuildUpdate(cur.toRoot())
gm, err := newTaskModel(g)
if err != nil {
return nil, err
}
err = p.checkLinkedRecords(&groupModel{Id: gm.GroupId}, &userModel{Id: gm.UserId})
if err != nil {
return nil, err
}
gm, err = p.taskHandler.UpdateOne(f, gm)
if err != nil {
return nil, err
}
return gm.toRoot(), err
}
// TaskDocInsert is used to insert a Task doc directly into mongodb for testing purposes
func (p *TaskService) TaskDocInsert(g *models.Task) (*models.Task, error) {
insertTask, err := newTaskModel(g)
if err != nil {
return nil, err
}
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
_, err = p.collection.InsertOne(ctx, insertTask)
if err != nil {
return nil, err
}
return insertTask.toRoot(), nil
}