Add yt-downloader

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

api/go.mod

@@ -6,4 +6,7 @@ require (
 	github.com/go-chi/chi v1.5.4 // indirect
 	github.com/go-chi/render v1.0.1 // indirect
 	github.com/google/uuid v1.3.0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	go.uber.org/zap v1.19.1 // indirect
 )

api/go.sum

@@ -1,6 +1,55 @@
+github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-chi/chi v1.5.4 h1:QHdzF2szwjqVV4wmByUnTcsbIg7UGaQ0tPF2t5GcAIs=
 github.com/go-chi/chi v1.5.4/go.mod h1:uaf8YgoFazUOkPBG7fxPftUylNumIev9awIWOENIuEg=
 github.com/go-chi/render v1.0.1 h1:4/5tis2cKaNdnv9zFLfXzcquC9HbeZgCnxGnKrltBS8=
 github.com/go-chi/render v1.0.1/go.mod h1:pq4Rr7HbnsdaeHagklXub+p6Wd16Af5l9koip1OvJns=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
+go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
+go.uber.org/goleak v1.1.11-0.20210813005559-691160354723/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
+go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
+go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
+go.uber.org/zap v1.19.1 h1:ue41HOKd1vGURxrmeKIgELGb3jPW9DMUDGtsinblHwI=
+go.uber.org/zap v1.19.1/go.mod h1:j3DNczoxDZroyBnOT1L/Q79cfUMGZxlv/9dzN7SM1rI=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

api/internal/app/api/download/request_download.go

@@ -9,7 +9,6 @@ import (
 )
 
 type requestDownloadRequest struct {
-	Provider string `json:"provider"`
 	Link string `json:"link"`
 }
 
@@ -22,7 +21,7 @@ func (_ requestDownloadResponse) Render(_ http.ResponseWriter, _ *http.Request)
 }
 
 func (dr *requestDownloadRequest) Bind(r *http.Request) error {
-	if dr.Link == "" || dr.Provider == "" {
+	if dr.Link == "" {
 		return errors.New("missing required download request field")
 	}
 
@@ -36,7 +35,7 @@ func (a *api) requestDownload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	download, err := a.drService.Schedule(data.Provider, data.Link)
+	download, err := a.drService.Schedule(data.Link)
 	if err != nil {
 		_ = render.Render(w, r, responses.ErrInvalidRequest(err))
 		return

api/internal/app/api/download/routes.go

@@ -1,15 +1,15 @@
 package download
 
 import (
-	"downloader/internal/core/ports/download_request"
+	"downloader/internal/core/services/download"
 	"github.com/go-chi/chi"
 )
 
 type api struct {
-	drService download_request.Service
+	drService download.Service
 }
 
-func New(service download_request.Service) *api {
+func New(service download.Service) *api {
 	return &api{drService: service}
 }
 

api/internal/app/router/router.go

@@ -2,11 +2,16 @@ package router
 
 import (
 	"downloader/internal/app/api/download"
-	"downloader/internal/core/ports/download_request"
+	"downloader/internal/core/ports/download_request/in_memory"
+	"downloader/internal/core/ports/downloader/yt_downloader"
+	"downloader/internal/core/services/download/default"
 	"downloader/pkg/common/uuid"
 	"github.com/go-chi/chi"
 	"github.com/go-chi/chi/middleware"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
 	"net/http"
+	"os"
 	"time"
 )
 
@@ -49,11 +54,40 @@ func (router *router) setupRoutes() *router {
 }
 
 func setupDownloadRoute(router *router) {
-	drRepository := download_request.NewInMemoryRepository()
+	sugaredLogger := setupLogger()
-	drBackgroundService := download_request.NewLocalBackgroundService(drRepository)
+
+	drRepository := in_memory.NewInMemoryRepository(sugaredLogger)
+	downloader := yt_downloader.New(sugaredLogger)
+	drBackgroundService := _default.NewLocalBackgroundService(drRepository, sugaredLogger, downloader)
 	gen := uuid.New()
 
-	drService := download_request.NewLocalService(drRepository, gen, drBackgroundService)
+	drService := _default.NewLocalService(drRepository, gen, drBackgroundService, sugaredLogger)
 	downloadApi := download.New(drService)
 	downloadApi.SetupDownloadApi(router.internalRouter)
 }
+
+func setupLogger() *zap.SugaredLogger {
+	consoleEncoder := zapcore.NewConsoleEncoder(zap.NewDevelopmentEncoderConfig())
+	jsonEncoder := zapcore.NewJSONEncoder(zap.NewProductionEncoderConfig())
+
+	consoleDebugging := zapcore.Lock(os.Stdout)
+	lowPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
+		return lvl < zapcore.ErrorLevel
+	})
+	highPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
+		return lvl >= zapcore.ErrorLevel
+	})
+	consoleErrors := zapcore.Lock(os.Stderr)
+	core := zapcore.NewTee(
+		zapcore.NewCore(jsonEncoder, consoleErrors, highPriority),
+		zapcore.NewCore(jsonEncoder, consoleDebugging, highPriority),
+		zapcore.NewCore(consoleEncoder, consoleErrors, highPriority),
+		zapcore.NewCore(consoleEncoder, consoleDebugging, lowPriority),
+	)
+	logger := zap.New(core)
+	defer func(logger *zap.Logger) {
+		_ = logger.Sync()
+	}(logger)
+	sugaredLogger := logger.Sugar()
+	return sugaredLogger
+}

api/internal/core/entities/download.go

@@ -9,12 +9,11 @@ type Download struct {
 	ID     string `json:"id"`
 	Status string `json:"status"`
 	Link   string `json:"link"`
-	Data   string `json:"data"`
 }
 
-func NewDownload(link string, data string) func(uuidGen uuid.Gen) (*Download, error) {
+func NewDownload(link string) func(uuidGen uuid.Gen) (*Download, error) {
 	return func(uuidGen uuid.Gen) (*Download, error) {
-		if link == "" || data == "" {
+		if link == "" {
 			return nil, errors.New("A field was not valid")
 		}
 
@@ -22,7 +21,6 @@ func NewDownload(link string, data string) func(uuidGen uuid.Gen) (*Download, er
 			ID:     uuidGen.Create(),
 			Status: "scheduled",
 			Link:   link,
-			Data:   data,
 		}, nil
 	}
 }

api/internal/core/ports/download_request/in_memory.go

@@ -1,110 +0,0 @@
-package download_request
-
-import (
-	"downloader/internal/core/entities"
-	"downloader/pkg/common/uuid"
-	"errors"
-	"fmt"
-	"time"
-)
-
-// Repository
-type inMemoryRepository struct {
-	collection map[string]*entities.Download
-}
-
-func NewInMemoryRepository() Repository {
-	return &inMemoryRepository{collection: make(map[string]*entities.Download)}
-}
-
-func (i *inMemoryRepository) Create(download *entities.Download) (*entities.Download, error) {
-	if doc := i.collection[download.ID]; doc != nil {
-		return nil, errors.New("download request already exists")
-	}
-
-	i.collection[download.ID] = download
-
-	return download, nil
-}
-
-func (i *inMemoryRepository) Update(download *entities.Download) error {
-
-	if doc := i.collection[download.ID]; doc == nil {
-		return errors.New("download request doesn't exist exists")
-	}
-
-	i.collection[download.ID] = download
-
-	return nil
-}
-
-func (i *inMemoryRepository) GetById(id string) (*entities.Download, error) {
-	if download := i.collection[id]; download != nil {
-		return download, nil
-	} else {
-		return nil, errors.New("download was not found in the database")
-	}
-}
-
-// Service
-type localService struct {
-	repository        Repository
-	uuidGen           uuid.Gen
-	BackgroundService BackgroundService
-}
-
-func NewLocalService(repository Repository, uuidGen uuid.Gen, backgroundService BackgroundService) Service {
-	return &localService{
-		repository:        repository,
-		uuidGen:           uuidGen,
-		BackgroundService: backgroundService,
-	}
-}
-
-func (l *localService) Schedule(provider string, link string) (*entities.Download, error) {
-	download, err := entities.NewDownload(link, provider)(l.uuidGen)
-	if err != nil {
-		return nil, err
-	}
-
-	persistedDownloadRequest, uploadErr := l.repository.Create(download)
-	if uploadErr != nil {
-		return nil, uploadErr
-	}
-
-	err = l.BackgroundService.Run(persistedDownloadRequest)
-	if err != nil {
-		return nil, err
-	}
-
-	return persistedDownloadRequest, nil
-}
-
-func (l *localService) Get(id string) (*entities.Download, error) {
-	return l.repository.GetById(id)
-}
-
-// Background service
-type localBackgroundService struct {
-	repository Repository
-}
-
-func NewLocalBackgroundService(repository Repository) BackgroundService {
-	return &localBackgroundService{repository: repository}
-}
-
-func (l localBackgroundService) Run(download *entities.Download) error {
-	go func() {
-		time.Sleep(time.Second * 5)
-		download.Status = "done"
-		err := l.repository.Update(download)
-		if err != nil {
-			fmt.Printf("Download request: %s failed\n", download.ID)
-			panic(err)
-		} else {
-			fmt.Printf("Download request: %s done\n", download.ID)
-		}
-	}()
-
-	return nil
-}

api/internal/core/ports/download_request/in_memory/repository.go

@@ -0,0 +1,56 @@
+package in_memory
+
+import (
+	"downloader/internal/core/entities"
+	"downloader/internal/core/ports/download_request"
+	"errors"
+	"go.uber.org/zap"
+)
+
+type inMemoryRepository struct {
+	collection map[string]*entities.Download
+	logger     *zap.SugaredLogger
+}
+
+func NewInMemoryRepository(logger *zap.SugaredLogger) download_request.Repository {
+	return &inMemoryRepository{collection: make(map[string]*entities.Download), logger: logger}
+}
+
+func (i *inMemoryRepository) Create(download *entities.Download) (*entities.Download, error) {
+	logger := i.logger.With("downloadId", download.ID)
+
+	if doc := i.collection[download.ID]; doc != nil {
+		logger.Warn("create: download already exists")
+		return nil, errors.New("download request already exists")
+	}
+
+	i.collection[download.ID] = download
+	logger.Info("added download to database")
+
+	return download, nil
+}
+
+func (i *inMemoryRepository) Update(download *entities.Download) error {
+	logger := i.logger.With("downloadId", download.ID)
+
+	if doc := i.collection[download.ID]; doc == nil {
+		logger.Warn("update: download doesnt exist")
+		return errors.New("download request doesn't exist exists")
+	}
+
+	i.collection[download.ID] = download
+	logger.Info("updated download to database")
+
+	return nil
+}
+
+func (i *inMemoryRepository) GetById(id string) (*entities.Download, error) {
+	logger := i.logger.With("downloadId", id)
+
+	if download := i.collection[id]; download != nil {
+		return download, nil
+	} else {
+		logger.Warn("download was not found in the database")
+		return nil, errors.New("download was not found in the database")
+	}
+}

api/internal/core/ports/download_request/repository.go

@@ -2,17 +2,8 @@ package download_request
 
 import "downloader/internal/core/entities"
 
-type Service interface {
-	Schedule(provider string, link string) (*entities.Download, error)
-	Get(id string) (*entities.Download, error)
-}
-
 type Repository interface {
 	Create(download *entities.Download) (*entities.Download, error)
 	GetById(id string) (*entities.Download, error)
 	Update(download *entities.Download) error
 }
-
-type BackgroundService interface {
-	Run(download *entities.Download) error
-}

api/internal/core/ports/downloader/downloader.go

@@ -0,0 +1,5 @@
+package downloader
+
+type Downloader interface {
+	Download(link string, updateEvent func(progress string)) error
+}

api/internal/core/ports/downloader/yt_downloader/yt.go

@@ -0,0 +1,130 @@
+package yt_downloader
+
+import (
+	"crypto/sha256"
+	"downloader/internal/core/ports/downloader"
+	"downloader/pkg/files"
+	"fmt"
+	"go.uber.org/zap"
+	"io"
+	"io/fs"
+	"log"
+	"os"
+	"os/exec"
+	"regexp"
+	"strings"
+	"time"
+)
+
+type YtDownloader struct {
+	outputDirectory  string
+	tempDirectory    string
+	checkFrequencyMs time.Duration
+	logger           *zap.SugaredLogger
+}
+
+func New(logger *zap.SugaredLogger) downloader.Downloader {
+	return &YtDownloader{
+		outputDirectory:  "/home/hermansen/Downloads/yt",
+		tempDirectory:    "/tmp/downloader",
+		checkFrequencyMs: 5000,
+		logger:           logger,
+	}
+}
+
+func init() {
+	_, err := exec.Command("youtube-dl", "--version").Output()
+	if err != nil {
+		log.Fatal("Youtube download (youtube-dl) isn't installed on the device")
+	}
+}
+
+func (y *YtDownloader) Download(link string, updateEvent func(progress string)) error {
+	baseDir := fmt.Sprintf("%s/%x",
+		y.tempDirectory,
+		sha256.Sum256([]byte(link)))
+	err := os.MkdirAll(baseDir, os.ModePerm)
+	err = os.MkdirAll(y.outputDirectory, os.ModePerm)
+	if err != nil {
+		y.logger.Error(err)
+		return err
+	}
+
+	filePath := fmt.Sprintf("%s/%s", baseDir, "%(title)s-%(id)s.%(ext)s")
+
+	command := exec.Command("youtube-dl",
+		"-R 3",
+		"-o",
+		filePath,
+		link,
+	)
+
+	var stdout io.ReadCloser
+	stdout, err = command.StdoutPipe()
+
+	go func() {
+		for true {
+			bytes := make([]byte, 1024)
+			_, err = stdout.Read(bytes)
+			if err != nil {
+				return
+			}
+			output := string(bytes)
+
+			compile := regexp.MustCompile(`[a-z\[\]\s]+([\d\.]+).[a-z\s]+([\d\.]+)([a-zA-Z]+)[a-z\s]+`)
+			if err != nil {
+				y.logger.Error(err)
+				return
+			}
+
+			res := compile.FindAllStringSubmatch(output, -1)
+			if len(res) != 0 && strings.Contains(res[0][0], "download") && len(res[0]) >= 2 {
+				progress := res[0][1]
+
+				y.logger.Debugw("progress",
+					"percentage", progress,
+					"link", link)
+				updateEvent(progress)
+			}
+
+			time.Sleep(time.Millisecond * y.checkFrequencyMs)
+		}
+	}()
+
+	err = command.Start()
+
+	if err != nil {
+		y.logger.Warn(err)
+		return err
+	}
+
+	err = command.Wait()
+	if err != nil {
+		return err
+	}
+
+	var dir []fs.DirEntry
+	dir, err = os.ReadDir(baseDir)
+	if err != nil {
+		y.logger.Error("Could not read directory")
+		return err
+	}
+
+	for _, fileInfo := range dir {
+		oldPath := fmt.Sprintf("%s/%s", baseDir, fileInfo.Name())
+		newPath := fmt.Sprintf("%s/%s", y.outputDirectory, fileInfo.Name())
+
+		if err := files.MoveFile(oldPath, newPath); err != nil {
+			return err
+		} else {
+			y.logger.Infow("moved file",
+				"fileName", fileInfo.Name())
+			if err := os.Remove(baseDir); err != nil {
+				y.logger.Warn("could not cleanup",
+					"path", oldPath)
+			}
+		}
+	}
+
+	return nil
+}

api/internal/core/services/download/background.go

@@ -0,0 +1,7 @@
+package download
+
+import "downloader/internal/core/entities"
+
+type BackgroundService interface {
+	Run(download *entities.Download) error
+}

api/internal/core/services/download/default/background.go

@@ -0,0 +1,55 @@
+package _default
+
+import (
+	"downloader/internal/core/entities"
+	"downloader/internal/core/ports/download_request"
+	"downloader/internal/core/ports/downloader"
+	"downloader/internal/core/services/download"
+	"fmt"
+	"go.uber.org/zap"
+)
+
+type localBackgroundService struct {
+	repository download_request.Repository
+	logger     *zap.SugaredLogger
+	downloader downloader.Downloader
+}
+
+func NewLocalBackgroundService(repository download_request.Repository, logger *zap.SugaredLogger, downloader downloader.Downloader) download.BackgroundService {
+	return &localBackgroundService{repository: repository, logger: logger, downloader: downloader}
+}
+
+func (l localBackgroundService) Run(download *entities.Download) error {
+	logger := l.logger.With("downloadId", download.ID)
+
+	go func() {
+		download.Status = "started"
+		_ = l.repository.Update(download)
+
+		err := l.downloader.Download(download.Link, func(progress string) {
+			download.Status = fmt.Sprintf("in-progress: %s", progress)
+			_ = l.repository.Update(download)
+		})
+		download.Status = "done"
+
+		if err != nil {
+			logger.Error(err)
+			download.Status = "failed"
+		}
+
+		err = l.repository.Update(download)
+		if err != nil {
+			logger.Errorw("download request failed",
+				"downloadLink", download.Link)
+			download.Status = "failed"
+
+			if updateErr := l.repository.Update(download); updateErr != nil {
+				panic(updateErr)
+			}
+		} else {
+			logger.Info("download request done")
+		}
+	}()
+
+	return nil
+}

api/internal/core/services/download/default/service.go

@@ -0,0 +1,53 @@
+package _default
+
+import (
+	"downloader/internal/core/entities"
+	"downloader/internal/core/ports/download_request"
+	"downloader/internal/core/services/download"
+	"downloader/pkg/common/uuid"
+	"go.uber.org/zap"
+)
+
+type localService struct {
+	repository        download_request.Repository
+	uuidGen           uuid.Gen
+	BackgroundService download.BackgroundService
+	logger            *zap.SugaredLogger
+}
+
+func NewLocalService(repository download_request.Repository, uuidGen uuid.Gen, backgroundService download.BackgroundService, logger *zap.SugaredLogger) download.Service {
+	return &localService{
+		repository:        repository,
+		uuidGen:           uuidGen,
+		BackgroundService: backgroundService,
+		logger:            logger,
+	}
+}
+
+func (l *localService) Schedule(link string) (*entities.Download, error) {
+	download, err := entities.NewDownload(link)(l.uuidGen)
+	if err != nil {
+		l.logger.Warn("Could not parse download")
+		return nil, err
+	}
+
+	logger := l.logger.With("downloadId", download.ID)
+
+	persistedDownloadRequest, uploadErr := l.repository.Create(download)
+	if uploadErr != nil {
+		logger.Error("failed to insert download request")
+		return nil, uploadErr
+	}
+
+	err = l.BackgroundService.Run(persistedDownloadRequest)
+	if err != nil {
+		logger.Error("failed to run download request")
+		return nil, err
+	}
+
+	return persistedDownloadRequest, nil
+}
+
+func (l *localService) Get(id string) (*entities.Download, error) {
+	return l.repository.GetById(id)
+}

api/internal/core/services/download/service.go

@@ -0,0 +1,8 @@
+package download
+
+import "downloader/internal/core/entities"
+
+type Service interface {
+	Schedule(link string) (*entities.Download, error)
+	Get(id string) (*entities.Download, error)
+}

api/pkg/files/move.go

@@ -0,0 +1,31 @@
+package files
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+func MoveFile(sourcePath, destPath string) error {
+	inputFile, err := os.Open(sourcePath)
+	if err != nil {
+		return fmt.Errorf("couldn't open source file: %s", err)
+	}
+	outputFile, err := os.Create(destPath)
+	if err != nil {
+		inputFile.Close()
+		return fmt.Errorf("couldn't open dest file: %s", err)
+	}
+	defer outputFile.Close()
+	_, err = io.Copy(outputFile, inputFile)
+	inputFile.Close()
+	if err != nil {
+		return fmt.Errorf("writing to output file failed: %s", err)
+	}
+	// The copy was successful, so now delete the original file
+	err = os.Remove(sourcePath)
+	if err != nil {
+		return fmt.Errorf("failed removing original file: %s", err)
+	}
+	return nil
+}