gonna swap from feeds.Feeds

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
 	golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 // indirect
 	golang.org/x/sys v0.31.0 // indirect
 	modernc.org/libc v1.62.1 // indirect

go.sum

@@ -10,6 +10,8 @@ github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdh
 github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
+github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 h1:nDVHiLt8aIbd/VzvPWN6kSOPE7+F/fNFDSXLVYkE/Iw=
 golang.org/x/exp v0.0.0-20250305212735-054e65f0b394/go.mod h1:sIifuuw/Yco/y6yb6+bDNfyeQ/MdPUy/hKEMYQV17cM=
 golang.org/x/mod v0.24.0 h1:ZfthKaKaT4NrhGVZHO1/WDTwGES4De8KtWO0SIbNJMU=

src/cmd/cron/main.go

@@ -2,9 +2,11 @@ package cron
 
 import (
 	"context"
-	"io"
+	"fmt"
 	"show-rss/src/feeds"
 	"time"
+
+	"github.com/robfig/cron/v3"
 )
 
 func Main(ctx context.Context) error {
@@ -30,10 +32,33 @@ func One(ctx context.Context) error {
 	}
 
 	return f.ForEach(ctx, func(feed feeds.Feed) error {
-		return one(ctx, feed)
+		if err := one(ctx, feed); err != nil {
+			return fmt.Errorf("failed to cron %s (%+v): %w", feed.Entry.ID, feed.Version, err)
+		}
+		return nil
 	})
 }
 
 func one(ctx context.Context, feed feeds.Feed) error {
-	return io.EOF
+	if schedule, err := cron.NewParser(
+		cron.SecondOptional |
+			cron.Minute |
+			cron.Hour |
+			cron.Dom |
+			cron.Month |
+			cron.Dow |
+			cron.Descriptor,
+	).Parse(feed.Version.Cron); err != nil {
+		return fmt.Errorf("illegal cron %q", feed.Version.Cron)
+	} else if next := schedule.Next(feed.Execution.Executed); time.Now().Before(next) {
+		return nil
+	}
+
+	return fmt.Errorf("should GET %s", feed.Version.URL)
+
+	f, err := feeds.New(ctx)
+	if err != nil {
+		return fmt.Errorf("failed new feeds to executed %s: %w", feed.Entry.ID, err)
+	}
+	return f.Executed(ctx, feed.Entry.ID, feed.Version.Created)
 }

src/cmd/cron/main_test.go

@@ -2,9 +2,13 @@ package cron_test
 
 import (
 	"context"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
 	"show-rss/src/cmd/cron"
 	"show-rss/src/db"
 	"show-rss/src/feeds"
+	"slices"
 	"strconv"
 	"testing"
 	"time"
@@ -19,6 +23,19 @@ func TestOne(t *testing.T) {
 			return db.Test(t, ctx)
 		},
 		"feeds": func() context.Context {
+			gets := []string{}
+			s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				gets = append(gets, r.URL.String())
+				t.Logf("%s", gets[len(gets)-1])
+			}))
+			t.Cleanup(s.Close)
+			t.Cleanup(func() {
+				slices.Sort(gets)
+				if len(gets) != 2+2+2 { // id=1+id=2 for each of 2 unrecycled ctx, id=1+id=2 for one across shared ctx
+					t.Errorf("didn't call urls exactly twice: %+v", gets)
+				}
+			})
+
 			ctx := db.Test(t, ctx)
 
 			f, err := feeds.New(ctx)
@@ -26,7 +43,7 @@ func TestOne(t *testing.T) {
 				t.Fatal(err)
 			}
 			for i := 0; i < 2; i++ {
-				if _, err := f.Insert(ctx, strconv.Itoa(i), "* * * * *"); err != nil {
+				if _, err := f.Insert(ctx, fmt.Sprintf("%s?idx=%d", s.URL, i), "* * * * *"); err != nil {
 					t.Fatal(err)
 				}
 			}