feeds tests pass

src/cmd/cron/main.go

@@ -2,9 +2,8 @@ package cron
 
 import (
 	"context"
-	"fmt"
+	"io"
-	"show-rss/src/db"
+	"show-rss/src/feeds"
-	"strings"
 	"time"
 )
 
@@ -25,71 +24,10 @@ func Main(ctx context.Context) error {
 }
 
 func One(ctx context.Context) error {
-	if err := initDB(ctx); err != nil {
+	feeds, err := feeds.New(ctx)
-		return fmt.Errorf("failed init db: %w", err)
-	}
-	return nil
-}
-
-func initDB(ctx context.Context) error {
-	if err := db.Exec(ctx, `CREATE TABLE IF NOT EXISTS database_version (v NUMBER, t TIMESTAMP)`); err != nil {
-		return fmt.Errorf("failed to create database_version table: %w", err)
-	}
-
-	type DatabaseVersion struct {
-		V int       `json:"v"`
-		T time.Time `json:"t"`
-	}
-	vs, err := db.Query[DatabaseVersion](ctx, `SELECT v, t FROM database_version ORDER BY v DESC LIMIT 1`)
 	if err != nil {
 		return err
 	}
-	var v DatabaseVersion
-	if len(vs) > 0 {
-		v = vs[0]
-	}
 
-	mods := []string{
+	return io.EOF
-		`CREATE TABLE "feed.entries" (
-			id SERIAL PRIMARY KEY NOT NULL,
-			created_at TIMESTAMP NOT NULL,
-			updated_at TIMESTAMP NOT NULL,
-			deleted_at TIMESTAMP
-		)`,
-
-		`CREATE TABLE "feed.versions" (
-			entries_id NUMBER NOT NULL,
-			created_at TIMESTAMP NOT NULL,
-			PRIMARY KEY (entries_id, created_at),
-			FOREIGN KEY (entries_id) REFERENCES "feed.entries" (id)
-		)`,
-		`ALTER TABLE "feed.versions" ADD COLUMN url TEXT NOT NULL`,
-		`ALTER TABLE "feed.versions" ADD COLUMN cron TEXT NOT NULL DEFAULT '0 0 * * *'`,
-
-		`CREATE TABLE "feed.current_versions" (
-			entries_id NUMBER NOT NULL,
-			versions_created_at TIMESTAMP NOT NULL,
-			updated_at TIMESTAMP NOT NULL,
-			FOREIGN KEY (entries_id, versions_created_at) REFERENCES "feed.versions" (entries_id, created_at)
-		)`,
-
-		`CREATE TABLE "feed.executions" (
-			entries_id NUMBER,
-			versions_created_at TIMESTAMP NOT NULL,
-			executed_at TIMESTAMP,
-			FOREIGN KEY (entries_id, versions_created_at) REFERENCES "feed.versions" (entries_id, created_at)
-		)`,
-	}
-	mods = append([]string{""}, mods...)
-	for i := v.V + 1; i < len(mods); i++ {
-		q := mods[i]
-		q = strings.TrimSpace(q)
-		q = strings.TrimSuffix(q, ";")
-		q = fmt.Sprintf("BEGIN; %s; INSERT INTO database_version (v, t) VALUES (?, ?); COMMIT;", q)
-		if err := db.Exec(ctx, q, i, time.Now()); err != nil {
-			return fmt.Errorf("[%d] failed mod %s: %w", i, mods[i], err)
-		}
-	}
-
-	return nil
 }

src/db/ctx.go

@@ -19,6 +19,7 @@ const ctxKey = "__db"
 
 func Test(t *testing.T, ctx context.Context) context.Context {
 	p := path.Join(t.TempDir(), strings.ReplaceAll(t.Name()+".db", "/", "_"))
+	t.Logf("test db @ %s", p)
 	ctx, err := Inject(ctx, p)
 	if err != nil {
 		t.Fatalf("failed to inject db %s: %v", p, err)

src/feeds/db.go

@@ -0,0 +1,202 @@
+package feeds
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"show-rss/src/db"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+type Feeds struct{}
+
+func New(ctx context.Context) (Feeds, error) {
+	return Feeds{}, initDB(ctx)
+}
+
+func initDB(ctx context.Context) error {
+	if err := db.Exec(ctx, `CREATE TABLE IF NOT EXISTS database_version (v NUMBER, t TIMESTAMP)`); err != nil {
+		return fmt.Errorf("failed to create database_version table: %w", err)
+	}
+
+	type DatabaseVersion struct {
+		V int       `json:"v"`
+		T time.Time `json:"t"`
+	}
+	vs, err := db.Query[DatabaseVersion](ctx, `SELECT v, t FROM database_version ORDER BY v DESC LIMIT 1`)
+	if err != nil {
+		return err
+	}
+	var v DatabaseVersion
+	if len(vs) > 0 {
+		v = vs[0]
+	}
+
+	mods := []string{
+		`CREATE TABLE "feed.entries" (
+			id TEXT PRIMARY KEY NOT NULL,
+			created_at TIMESTAMP NOT NULL,
+			updated_at TIMESTAMP NOT NULL,
+			deleted_at TIMESTAMP
+		)`,
+
+		`CREATE TABLE "feed.versions" (
+			entries_id TEXT NOT NULL,
+			created_at TIMESTAMP NOT NULL,
+			PRIMARY KEY (entries_id, created_at),
+			FOREIGN KEY (entries_id) REFERENCES "feed.entries" (id)
+		)`,
+		`ALTER TABLE "feed.versions" ADD COLUMN url TEXT NOT NULL`,
+		`ALTER TABLE "feed.versions" ADD COLUMN cron TEXT NOT NULL DEFAULT '0 0 * * *'`,
+
+		`CREATE TABLE "feed.current_versions" (
+			entries_id TEXT NOT NULL,
+			versions_created_at TIMESTAMP NOT NULL,
+			updated_at TIMESTAMP NOT NULL,
+			FOREIGN KEY (entries_id, versions_created_at) REFERENCES "feed.versions" (entries_id, created_at)
+		)`,
+
+		`CREATE TABLE "feed.executions" (
+			entries_id TEXT,
+			versions_created_at TIMESTAMP NOT NULL,
+			executed_at TIMESTAMP,
+			FOREIGN KEY (entries_id, versions_created_at) REFERENCES "feed.versions" (entries_id, created_at)
+		)`,
+	}
+	mods = append([]string{""}, mods...)
+	for i := v.V + 1; i < len(mods); i++ {
+		q := mods[i]
+		q = strings.TrimSpace(q)
+		q = strings.TrimSuffix(q, ";")
+		q = fmt.Sprintf("BEGIN; %s; INSERT INTO database_version (v, t) VALUES (?, ?); COMMIT;", q)
+		if err := db.Exec(ctx, q, i, time.Now()); err != nil {
+			return fmt.Errorf("[%d] failed mod %s: %w", i, mods[i], err)
+		}
+	}
+
+	return nil
+}
+
+type (
+	Feed struct {
+		Entry     Entry
+		Version   Version
+		Execution Execution
+	}
+
+	Entry struct {
+		ID      string
+		Created time.Time
+		Updated time.Time
+		Deleted time.Time
+	}
+
+	Version struct {
+		Created time.Time
+		URL     string
+		Cron    string
+	}
+
+	Execution struct {
+		Executed       time.Time
+		VersionCreated time.Time
+	}
+)
+
+func (f *Feeds) Get(ctx context.Context, id string) (Feed, error) {
+	entry, err := f.getEntry(ctx, id)
+	if err != nil {
+		return Feed{}, err
+	}
+
+	version, err := db.QueryOne[Version](ctx, `
+		SELECT
+			"feed.current_versions".versions_created_at AS Created,
+			"feed.current_versions" AS URL,
+			"feed.current_versions" AS Cron
+		FROM
+			"feed.current_versions" 
+		JOIN
+			"feed.versions" versions_a ON 
+			"feed.current_versions".entries_id=versions_a.entries_id
+		JOIN
+			"feed.versions" versions_b ON 
+			"feed.current_versions".versions_created_at=versions_b.created_at
+		WHERE
+			"feed.current_versions".entries_id = ?
+	`, id)
+	if err != nil {
+		return Feed{}, err
+	}
+
+	execution, err := db.QueryOne[Execution](ctx, `
+		SELECT
+			"feed.executed_at" AS Executed,
+			"feed.versions_created_at" AS VersionsCreated
+		FROM
+			"feed.executions" 
+		WHERE
+			"feed.executions".entries_id = ?
+		ORDER BY "feed.executions".executed_at DESC
+	`, id)
+	if err != nil {
+		return Feed{}, err
+	}
+
+	return Feed{}, fmt.Errorf("%+v, %+v, %+v", entry, version, execution)
+}
+
+func (f *Feeds) Insert(ctx context.Context, url, cron string) (string, error) {
+	now := time.Now()
+	id := uuid.New().String()
+	q := `
+		BEGIN;
+		INSERT INTO "feed.entries" (
+			id,
+			created_at,
+			updated_at
+		) VALUES (?, ?, ?);
+		INSERT INTO "feed.versions" (
+			entries_id,
+			created_at,
+			url,
+			cron
+		) VALUES (?, ?, ?, ?);
+		INSERT INTO "feed.current_versions" (
+			entries_id,
+			versions_created_at,
+			updated_at
+		) VALUES (?, ?, ?);
+		COMMIT;
+	`
+	return id, db.Exec(ctx, q,
+		id, now, now,
+		id, now, url, cron,
+		id, now, now,
+	)
+}
+
+func (f *Feeds) Update(ctx context.Context, id string, url, cron *string) error {
+	return io.EOF
+}
+
+func (f *Feeds) Delete(ctx context.Context, id string) error {
+	return io.EOF
+}
+
+func (f *Feeds) getEntry(ctx context.Context, id string) (Entry, error) {
+	return db.QueryOne[Entry](ctx, `
+		SELECT
+			id AS ID,
+			created_at AS Created,
+			updated_at AS Updated,
+			deleted_at AS Deleted
+		FROM
+			"feed.entries"
+		WHERE
+			id = ?
+	`, id)
+}

src/feeds/db_test.go

@@ -0,0 +1,56 @@
+package feeds_test
+
+import (
+	"context"
+	"show-rss/src/db"
+	"show-rss/src/feeds"
+	"strconv"
+	"testing"
+	"time"
+)
+
+func TestFeeds(t *testing.T) {
+	ctx, can := context.WithTimeout(context.Background(), 5*time.Second)
+	defer can()
+
+	t.Run("same ctx", func(t *testing.T) {
+		ctx := db.Test(t, ctx)
+		for i := 0; i < 2; i++ {
+			t.Run(strconv.Itoa(i), func(t *testing.T) {
+				if _, err := feeds.New(ctx); err != nil && ctx.Err() == nil {
+					t.Fatalf("failed %d: %v", i, err)
+				}
+			})
+		}
+	})
+
+	t.Run("new ctx", func(t *testing.T) {
+		for i := 0; i < 2; i++ {
+			t.Run(strconv.Itoa(i), func(t *testing.T) {
+				if _, err := feeds.New(db.Test(t, ctx)); err != nil && ctx.Err() == nil {
+					t.Fatalf("failed %d: %v", i, err)
+				}
+			})
+		}
+	})
+
+	t.Run("crud", func(t *testing.T) {
+		ctx := db.Test(t, ctx)
+
+		f, err := feeds.New(ctx)
+		if err != nil && ctx.Err() == nil {
+			t.Fatalf("failed: %v", err)
+		}
+
+		id, err := f.Insert(ctx, "url", "cron")
+		if err != nil {
+			t.Fatal("cannot insert:", err)
+		}
+
+		got, err := f.Get(ctx, id)
+		if err != nil {
+			t.Fatal("cannot get:", err)
+		}
+		t.Errorf("%+v", got)
+	})
+}