impl asses.checkLast(), .check()

src/asses/db.go

@@ -33,11 +33,49 @@ func Record(ctx context.Context) error {
 	return db.Exec(ctx, `INSERT INTO "asses.executions" (id, executed_at) VALUES ($1, $2)`, uuid.New().String(), time.Now())
 }
 
+type last struct {
+	T     time.Time `json:"checked_at"`
+	Cksum string    `json:"cksum"`
+}
+
+func checkLast(ctx context.Context, p string) (last, error) {
+	if err := initDB(ctx); err != nil {
+		return last{}, err
+	}
+
+	return db.QueryOne[last](ctx, `
+		SELECT checked_at, cksum
+		FROM "asses.checks"
+		WHERE p=$1
+	`, p)
+}
+
+func checked(ctx context.Context, p, cksum string) error {
+	if err := initDB(ctx); err != nil {
+		return err
+	}
+
+	return db.Exec(ctx, `
+		INSERT INTO "asses.checks"
+		(p, checked_at, cksum)
+		VALUES ($1, $2, $3)
+
+		ON CONFLICT DO UPDATE
+		SET checked_at=$2, cksum=$3
+		WHERE p=$1
+	`, p, time.Now(), cksum)
+}
+
 func initDB(ctx context.Context) error {
 	return db.InitializeSchema(ctx, "asses", []string{
 		`CREATE TABLE "asses.executions" (
 			id TEXT PRIMARY KEY NOT NULL,
 			executed_at TIMESTAMP NOT NULL
 		)`,
+		`CREATE TABLE "asses.checks" (
+			p TEXT PRIMARY KEY NOT NULL,
+			checked_at TIMESTAMP NOT NULL,
+			cksum TEXT NOT NULL
+		)`,
 	})
 }

src/asses/db_integration_test.go

@@ -0,0 +1,29 @@
+package asses_test
+
+import (
+	"context"
+	"show-rss/src/asses"
+	"show-rss/src/db"
+	"testing"
+	"time"
+)
+
+func TestNextRecord(t *testing.T) {
+	ctx := db.Test(t, context.Background())
+
+	if v, err := asses.Next(ctx); err != nil {
+		t.Fatal(err)
+	} else if zero := v.IsZero(); !zero {
+		t.Fatal(v)
+	}
+
+	if err := asses.Record(ctx); err != nil {
+		t.Fatal(err)
+	}
+
+	if v, err := asses.Next(ctx); err != nil {
+		t.Fatal(err)
+	} else if since := time.Since(v); since > time.Minute {
+		t.Fatal(since)
+	}
+}

src/asses/db_test.go

@@ -1,29 +1,29 @@
-package asses_test
+package asses
 
 import (
 	"context"
-	"show-rss/src/asses"
 	"show-rss/src/db"
 	"testing"
-	"time"
 )
 
-func TestNextRecord(t *testing.T) {
+func TestLast(t *testing.T) {
 	ctx := db.Test(t, context.Background())
 
-	if v, err := asses.Next(ctx); err != nil {
+	if last, err := checkLast(ctx, "p"); err != nil {
 		t.Fatal(err)
-	} else if zero := v.IsZero(); !zero {
-		t.Fatal(v)
+	} else if !last.T.IsZero() || last.Cksum != "" {
+		t.Fatal(last)
 	}
 
-	if err := asses.Record(ctx); err != nil {
+	if err := checked(ctx, "p", "cksum"); err != nil {
+		t.Fatal(err)
+	} else if err := checked(ctx, "p", "cksum"); err != nil {
 		t.Fatal(err)
 	}
 
-	if v, err := asses.Next(ctx); err != nil {
+	if last, err := checkLast(ctx, "p"); err != nil {
 		t.Fatal(err)
-	} else if since := time.Since(v); since > time.Minute {
-		t.Fatal(since)
+	} else if last.T.IsZero() || last.Cksum != "cksum" {
+		t.Fatal(last)
 	}
 }

src/asses/one.go

@@ -0,0 +1,10 @@
+package asses
+
+import (
+	"context"
+	"io"
+)
+
+func One(ctx context.Context, p string) error {
+	return io.EOF
+}