Add background fetch routine and handle fetch operations in parallel
This commit is contained in:
parent
8b098dadb2
commit
77031ef602
1
Makefile
1
Makefile
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@ -17,6 +17,7 @@ bin/moq:
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gen-mocks: bin/moq
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gen-mocks: bin/moq
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./bin/moq -pkg db_mock -out ./mocks/db/db.go ./db DB
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./bin/moq -pkg db_mock -out ./mocks/db/db.go ./db DB
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./bin/moq -pkg parser_mock -out ./mocks/feedparser/feedparser.go ./feedparser Parser
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go fmt ./...
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go fmt ./...
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bin/golangci-lint:
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bin/golangci-lint:
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19
cmd/main.go
19
cmd/main.go
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@ -13,6 +13,7 @@ import (
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/config"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/config"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/feedparser"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/handler"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/handler"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/auth"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/auth"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/ytrssil"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/ytrssil"
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@ -24,6 +25,16 @@ func init() {
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time.Local = time.UTC
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time.Local = time.UTC
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}
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}
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func fetcherRoutine(l log.Logger, h handler.Handler) {
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for {
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err := h.FetchVideos(context.Background())
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if err != nil {
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l.Log("level", "ERROR", "function", "main.fetcherRoutine", "call", "handler.FetchVideos", "err", err)
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}
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time.Sleep(5 * time.Minute)
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}
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}
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func main() {
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func main() {
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log := log.NewLogger()
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log := log.NewLogger()
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@ -32,14 +43,13 @@ func main() {
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log.Log("level", "FATAL", "call", "config.Parse", "error", err)
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log.Log("level", "FATAL", "call", "config.Parse", "error", err)
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return
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return
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}
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}
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db, err := db.NewPostgresDB(log, config.DB)
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db, err := db.NewPostgresDB(log, config.DB)
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if err != nil {
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if err != nil {
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log.Log("level", "FATAL", "call", "db.NewPostgresDB", "error", err)
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log.Log("level", "FATAL", "call", "db.NewPostgresDB", "error", err)
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return
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return
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}
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}
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parser := feedparser.NewParser(log)
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handler := handler.New(log, db)
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handler := handler.New(log, db, parser)
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gin.SetMode(gin.ReleaseMode)
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gin.SetMode(gin.ReleaseMode)
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router, err := ytrssil.SetupGinRouter(
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router, err := ytrssil.SetupGinRouter(
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log,
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log,
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@ -79,6 +89,9 @@ func main() {
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}
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}
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}()
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}()
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// start periodic fetch videos routine
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go fetcherRoutine(log, handler)
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log.Log(
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log.Log(
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"level", "INFO",
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"level", "INFO",
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"msg", "ytrssil API is starting up",
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"msg", "ytrssil API is starting up",
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@ -14,6 +14,7 @@ import (
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/config"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/config"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/feedparser"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/handler"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/handler"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/auth"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/auth"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/ytrssil"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/httpserver/ytrssil"
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@ -34,8 +35,8 @@ func setupTestServer(t *testing.T, authEnabled bool) (*http.Server, db.DB) {
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if !assert.NoError(t, err) {
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if !assert.NoError(t, err) {
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return nil, nil
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return nil, nil
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}
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}
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parser := feedparser.NewParser(l)
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handler := handler.New(l, db)
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handler := handler.New(l, db, parser)
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gin.SetMode(gin.TestMode)
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gin.SetMode(gin.TestMode)
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router, err := ytrssil.SetupGinRouter(
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router, err := ytrssil.SetupGinRouter(
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l,
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l,
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@ -6,6 +6,7 @@ import (
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"fmt"
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"fmt"
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"io"
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"io"
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"net/http"
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"net/http"
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"sync"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/lib/log"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/lib/log"
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"github.com/paulrosania/go-charset/charset"
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"github.com/paulrosania/go-charset/charset"
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@ -18,29 +19,31 @@ var (
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var urlFormat = "https://www.youtube.com/feeds/videos.xml?channel_id=%s"
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var urlFormat = "https://www.youtube.com/feeds/videos.xml?channel_id=%s"
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// Video struct for each video in the feed
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type Parser interface {
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type Video struct {
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Parse(channelID string) (*Channel, error)
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ID string `xml:"id"`
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ParseThreadSafe(channelID string, channelChan chan *Channel, errChan chan error, mu *sync.Mutex, wg *sync.WaitGroup)
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Title string `xml:"title"`
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Published Date `xml:"published"`
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}
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}
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// Channel struct for RSS
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type parser struct {
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type Channel struct {
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log log.Logger
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Name string `xml:"title"`
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Videos []Video `xml:"entry"`
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}
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}
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func read(l log.Logger, url string) (io.ReadCloser, error) {
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func NewParser(l log.Logger) *parser {
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return &parser{
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log: l,
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}
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}
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func (p *parser) fetch(url string) (io.ReadCloser, error) {
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req, err := http.NewRequest("GET", url, nil)
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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if err != nil {
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l.Log("level", "ERROR", "function", "feedparser.read", "call", "http.NewRequest", "error", err)
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p.log.Log("level", "ERROR", "function", "feedparser.fetch", "call", "http.NewRequest", "error", err)
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return nil, err
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return nil, err
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}
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}
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response, err := http.DefaultClient.Do(req)
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response, err := http.DefaultClient.Do(req)
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if err != nil {
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if err != nil {
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l.Log("level", "ERROR", "function", "feedparser.read", "call", "http.Do", "error", err)
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p.log.Log("level", "ERROR", "function", "feedparser.fetch", "call", "http.Do", "error", err)
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return nil, err
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return nil, err
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}
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}
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@ -54,9 +57,9 @@ func read(l log.Logger, url string) (io.ReadCloser, error) {
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}
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}
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// Parse parses a YouTube channel XML feed from a channel ID
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// Parse parses a YouTube channel XML feed from a channel ID
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func Parse(l log.Logger, channelID string) (*Channel, error) {
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func (p *parser) Parse(channelID string) (*Channel, error) {
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url := fmt.Sprintf(urlFormat, channelID)
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url := fmt.Sprintf(urlFormat, channelID)
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reader, err := read(l, url)
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reader, err := p.fetch(url)
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if err != nil {
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if err != nil {
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return nil, err
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return nil, err
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}
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}
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@ -67,8 +70,23 @@ func Parse(l log.Logger, channelID string) (*Channel, error) {
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var channel Channel
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var channel Channel
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if err := xmlDecoder.Decode(&channel); err != nil {
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if err := xmlDecoder.Decode(&channel); err != nil {
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l.Log("level", "ERROR", "function", "feedparser.read", "call", "xml.Decode", "error", err)
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p.log.Log("level", "ERROR", "function", "feedparser.Parse", "call", "xml.Decode", "error", err)
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return nil, fmt.Errorf("%w: %s", ErrParseFailed, err.Error())
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return nil, fmt.Errorf("%w: %s", ErrParseFailed, err.Error())
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}
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}
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channel.ID = channelID
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return &channel, nil
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return &channel, nil
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}
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}
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// ParseThreadSafe calls Parse, but additionally accepts an out parameter to store the result,
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// as well as a mutex and wait group to run multiple fetches in parallel
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func (p *parser) ParseThreadSafe(
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channelID string, channelChan chan *Channel, errChan chan error, mu *sync.Mutex, wg *sync.WaitGroup,
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) {
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channel, err := p.Parse(channelID)
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mu.Lock()
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channelChan <- channel
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errChan <- err
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mu.Unlock()
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wg.Done()
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}
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@ -0,0 +1,15 @@
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package feedparser
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// Video struct for each video in the feed
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type Video struct {
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ID string `xml:"id"`
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Title string `xml:"title"`
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Published Date `xml:"published"`
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}
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// Channel struct for RSS
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type Channel struct {
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ID string
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Name string `xml:"title"`
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Videos []Video `xml:"entry"`
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}
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@ -5,12 +5,11 @@ import (
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"errors"
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"errors"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/feedparser"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/models"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/models"
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)
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)
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func (h *handler) SubscribeToChannel(ctx context.Context, username string, channelID string) error {
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func (h *handler) SubscribeToChannel(ctx context.Context, username string, channelID string) error {
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parsedChannel, err := feedparser.Parse(h.log, channelID)
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parsedChannel, err := h.parser.Parse(channelID)
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if err != nil {
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if err != nil {
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return err
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return err
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}
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}
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@ -4,6 +4,7 @@ import (
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"context"
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"context"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/feedparser"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/lib/log"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/lib/log"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/models"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/models"
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)
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)
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@ -22,8 +23,13 @@ type Handler interface {
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type handler struct {
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type handler struct {
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log log.Logger
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log log.Logger
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db db.DB
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db db.DB
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parser feedparser.Parser
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}
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}
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func New(log log.Logger, db db.DB) *handler {
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func New(log log.Logger, db db.DB, parser feedparser.Parser) *handler {
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return &handler{log: log, db: db}
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return &handler{
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log: log,
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db: db,
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parser: parser,
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}
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}
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}
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@ -10,6 +10,7 @@ import (
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/config"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/config"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/lib/log"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/lib/log"
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db_mock "gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/mocks/db"
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db_mock "gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/mocks/db"
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parser_mock "gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/mocks/feedparser"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/models"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/models"
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)
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)
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@ -35,7 +36,7 @@ func TestGetNewVideos(t *testing.T) {
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},
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},
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}, nil
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}, nil
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},
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},
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})
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}, &parser_mock.ParserMock{})
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// Act
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// Act
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resp, err := handler.GetNewVideos(context.TODO(), "username")
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resp, err := handler.GetNewVideos(context.TODO(), "username")
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@ -4,6 +4,7 @@ import (
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"context"
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"context"
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"errors"
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"errors"
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"strings"
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"strings"
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"sync"
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"time"
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"time"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/db"
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@ -37,7 +38,7 @@ func (h *handler) addVideoToAllSubscribers(ctx context.Context, channelID string
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return nil
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return nil
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}
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}
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func (h *handler) fetchVideosForChannel(ctx context.Context, channelID string, parsedChannel *feedparser.Channel) {
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func (h *handler) addVideosForChannel(ctx context.Context, parsedChannel *feedparser.Channel) {
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for _, parsedVideo := range parsedChannel.Videos {
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for _, parsedVideo := range parsedChannel.Videos {
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date, err := parsedVideo.Published.Parse()
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date, err := parsedVideo.Published.Parse()
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if err != nil {
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if err != nil {
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@ -45,20 +46,20 @@ func (h *handler) fetchVideosForChannel(ctx context.Context, channelID string, p
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continue
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continue
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}
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}
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id := strings.Split(parsedVideo.ID, ":")[2]
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videoID := strings.Split(parsedVideo.ID, ":")[2]
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video := models.Video{
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video := models.Video{
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ID: id,
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ID: videoID,
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Title: parsedVideo.Title,
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Title: parsedVideo.Title,
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PublishedTime: date,
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PublishedTime: date,
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}
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}
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err = h.db.AddVideo(ctx, video, channelID)
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err = h.db.AddVideo(ctx, video, parsedChannel.ID)
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if err != nil {
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if err != nil {
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if !errors.Is(err, db.ErrVideoExists) {
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if !errors.Is(err, db.ErrVideoExists) {
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h.log.Log("level", "WARNING", "call", "db.AddVideo", "err", err)
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h.log.Log("level", "WARNING", "call", "db.AddVideo", "err", err)
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}
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}
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continue
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continue
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}
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}
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err = h.addVideoToAllSubscribers(ctx, channelID, id)
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err = h.addVideoToAllSubscribers(ctx, parsedChannel.ID, videoID)
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if err != nil {
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if err != nil {
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continue
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continue
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}
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}
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@ -66,18 +67,29 @@ func (h *handler) fetchVideosForChannel(ctx context.Context, channelID string, p
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}
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}
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func (h *handler) FetchVideos(ctx context.Context) error {
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func (h *handler) FetchVideos(ctx context.Context) error {
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h.log.Log("level", "INFO", "msg", "fetching new videos for all channels")
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channels, err := h.db.ListChannels(ctx)
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channels, err := h.db.ListChannels(ctx)
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if err != nil {
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if err != nil {
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return err
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return err
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}
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}
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var parsedChannels = make(chan *feedparser.Channel, len(channels))
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var errors = make(chan error, len(channels))
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var wg sync.WaitGroup
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var mu sync.Mutex
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for _, channel := range channels {
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for _, channel := range channels {
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parsedChannel, err := feedparser.Parse(h.log, channel.ID)
|
wg.Add(1)
|
||||||
|
go h.parser.ParseThreadSafe(channel.ID, parsedChannels, errors, &mu, &wg)
|
||||||
|
}
|
||||||
|
wg.Wait()
|
||||||
|
|
||||||
|
for range channels {
|
||||||
|
parsedChannel := <-parsedChannels
|
||||||
|
err = <-errors
|
||||||
if err != nil {
|
if err != nil {
|
||||||
continue
|
continue
|
||||||
}
|
}
|
||||||
|
h.addVideosForChannel(ctx, parsedChannel)
|
||||||
h.fetchVideosForChannel(ctx, channel.ID, parsedChannel)
|
|
||||||
}
|
}
|
||||||
|
|
||||||
return nil
|
return nil
|
||||||
|
|
|
@ -28,7 +28,7 @@ func init() {
|
||||||
func setupTestServer(t *testing.T) *http.Server {
|
func setupTestServer(t *testing.T) *http.Server {
|
||||||
l := log.NewNopLogger()
|
l := log.NewNopLogger()
|
||||||
|
|
||||||
handler := handler.New(l, nil)
|
handler := handler.New(l, nil, nil)
|
||||||
|
|
||||||
gin.SetMode(gin.TestMode)
|
gin.SetMode(gin.TestMode)
|
||||||
router, err := ytrssil.SetupGinRouter(
|
router, err := ytrssil.SetupGinRouter(
|
||||||
|
|
|
@ -0,0 +1,143 @@
|
||||||
|
// Code generated by moq; DO NOT EDIT.
|
||||||
|
// github.com/matryer/moq
|
||||||
|
|
||||||
|
package parser_mock
|
||||||
|
|
||||||
|
import (
|
||||||
|
"gitea.theedgeofrage.com/TheEdgeOfRage/ytrssil-api/feedparser"
|
||||||
|
"sync"
|
||||||
|
)
|
||||||
|
|
||||||
|
// Ensure, that ParserMock does implement feedparser.Parser.
|
||||||
|
// If this is not the case, regenerate this file with moq.
|
||||||
|
var _ feedparser.Parser = &ParserMock{}
|
||||||
|
|
||||||
|
// ParserMock is a mock implementation of feedparser.Parser.
|
||||||
|
//
|
||||||
|
// func TestSomethingThatUsesParser(t *testing.T) {
|
||||||
|
//
|
||||||
|
// // make and configure a mocked feedparser.Parser
|
||||||
|
// mockedParser := &ParserMock{
|
||||||
|
// ParseFunc: func(channelID string) (*feedparser.Channel, error) {
|
||||||
|
// panic("mock out the Parse method")
|
||||||
|
// },
|
||||||
|
// ParseThreadSafeFunc: func(channelID string, channelChan chan *feedparser.Channel, errChan chan error, mu *sync.Mutex, wg *sync.WaitGroup) {
|
||||||
|
// panic("mock out the ParseThreadSafe method")
|
||||||
|
// },
|
||||||
|
// }
|
||||||
|
//
|
||||||
|
// // use mockedParser in code that requires feedparser.Parser
|
||||||
|
// // and then make assertions.
|
||||||
|
//
|
||||||
|
// }
|
||||||
|
type ParserMock struct {
|
||||||
|
// ParseFunc mocks the Parse method.
|
||||||
|
ParseFunc func(channelID string) (*feedparser.Channel, error)
|
||||||
|
|
||||||
|
// ParseThreadSafeFunc mocks the ParseThreadSafe method.
|
||||||
|
ParseThreadSafeFunc func(channelID string, channelChan chan *feedparser.Channel, errChan chan error, mu *sync.Mutex, wg *sync.WaitGroup)
|
||||||
|
|
||||||
|
// calls tracks calls to the methods.
|
||||||
|
calls struct {
|
||||||
|
// Parse holds details about calls to the Parse method.
|
||||||
|
Parse []struct {
|
||||||
|
// ChannelID is the channelID argument value.
|
||||||
|
ChannelID string
|
||||||
|
}
|
||||||
|
// ParseThreadSafe holds details about calls to the ParseThreadSafe method.
|
||||||
|
ParseThreadSafe []struct {
|
||||||
|
// ChannelID is the channelID argument value.
|
||||||
|
ChannelID string
|
||||||
|
// ChannelChan is the channelChan argument value.
|
||||||
|
ChannelChan chan *feedparser.Channel
|
||||||
|
// ErrChan is the errChan argument value.
|
||||||
|
ErrChan chan error
|
||||||
|
// Mu is the mu argument value.
|
||||||
|
Mu *sync.Mutex
|
||||||
|
// Wg is the wg argument value.
|
||||||
|
Wg *sync.WaitGroup
|
||||||
|
}
|
||||||
|
}
|
||||||
|
lockParse sync.RWMutex
|
||||||
|
lockParseThreadSafe sync.RWMutex
|
||||||
|
}
|
||||||
|
|
||||||
|
// Parse calls ParseFunc.
|
||||||
|
func (mock *ParserMock) Parse(channelID string) (*feedparser.Channel, error) {
|
||||||
|
if mock.ParseFunc == nil {
|
||||||
|
panic("ParserMock.ParseFunc: method is nil but Parser.Parse was just called")
|
||||||
|
}
|
||||||
|
callInfo := struct {
|
||||||
|
ChannelID string
|
||||||
|
}{
|
||||||
|
ChannelID: channelID,
|
||||||
|
}
|
||||||
|
mock.lockParse.Lock()
|
||||||
|
mock.calls.Parse = append(mock.calls.Parse, callInfo)
|
||||||
|
mock.lockParse.Unlock()
|
||||||
|
return mock.ParseFunc(channelID)
|
||||||
|
}
|
||||||
|
|
||||||
|
// ParseCalls gets all the calls that were made to Parse.
|
||||||
|
// Check the length with:
|
||||||
|
//
|
||||||
|
// len(mockedParser.ParseCalls())
|
||||||
|
func (mock *ParserMock) ParseCalls() []struct {
|
||||||
|
ChannelID string
|
||||||
|
} {
|
||||||
|
var calls []struct {
|
||||||
|
ChannelID string
|
||||||
|
}
|
||||||
|
mock.lockParse.RLock()
|
||||||
|
calls = mock.calls.Parse
|
||||||
|
mock.lockParse.RUnlock()
|
||||||
|
return calls
|
||||||
|
}
|
||||||
|
|
||||||
|
// ParseThreadSafe calls ParseThreadSafeFunc.
|
||||||
|
func (mock *ParserMock) ParseThreadSafe(channelID string, channelChan chan *feedparser.Channel, errChan chan error, mu *sync.Mutex, wg *sync.WaitGroup) {
|
||||||
|
if mock.ParseThreadSafeFunc == nil {
|
||||||
|
panic("ParserMock.ParseThreadSafeFunc: method is nil but Parser.ParseThreadSafe was just called")
|
||||||
|
}
|
||||||
|
callInfo := struct {
|
||||||
|
ChannelID string
|
||||||
|
ChannelChan chan *feedparser.Channel
|
||||||
|
ErrChan chan error
|
||||||
|
Mu *sync.Mutex
|
||||||
|
Wg *sync.WaitGroup
|
||||||
|
}{
|
||||||
|
ChannelID: channelID,
|
||||||
|
ChannelChan: channelChan,
|
||||||
|
ErrChan: errChan,
|
||||||
|
Mu: mu,
|
||||||
|
Wg: wg,
|
||||||
|
}
|
||||||
|
mock.lockParseThreadSafe.Lock()
|
||||||
|
mock.calls.ParseThreadSafe = append(mock.calls.ParseThreadSafe, callInfo)
|
||||||
|
mock.lockParseThreadSafe.Unlock()
|
||||||
|
mock.ParseThreadSafeFunc(channelID, channelChan, errChan, mu, wg)
|
||||||
|
}
|
||||||
|
|
||||||
|
// ParseThreadSafeCalls gets all the calls that were made to ParseThreadSafe.
|
||||||
|
// Check the length with:
|
||||||
|
//
|
||||||
|
// len(mockedParser.ParseThreadSafeCalls())
|
||||||
|
func (mock *ParserMock) ParseThreadSafeCalls() []struct {
|
||||||
|
ChannelID string
|
||||||
|
ChannelChan chan *feedparser.Channel
|
||||||
|
ErrChan chan error
|
||||||
|
Mu *sync.Mutex
|
||||||
|
Wg *sync.WaitGroup
|
||||||
|
} {
|
||||||
|
var calls []struct {
|
||||||
|
ChannelID string
|
||||||
|
ChannelChan chan *feedparser.Channel
|
||||||
|
ErrChan chan error
|
||||||
|
Mu *sync.Mutex
|
||||||
|
Wg *sync.WaitGroup
|
||||||
|
}
|
||||||
|
mock.lockParseThreadSafe.RLock()
|
||||||
|
calls = mock.calls.ParseThreadSafe
|
||||||
|
mock.lockParseThreadSafe.RUnlock()
|
||||||
|
return calls
|
||||||
|
}
|
Loading…
Reference in New Issue