Implement delete and check token

users.go

@@ -1,6 +1,8 @@
 package users
 
 import (
+	"fmt"
+
 	"github.com/jmoiron/sqlx"
 	"gitlab.quimbo.fr/odwrtw/canape-sql/random"
 )
@@ -11,7 +13,7 @@ CREATE TABLE users (
 	name text NOT NULL UNIQUE
 );
 
-CREATE TABLE token (
+CREATE TABLE tokens (
 	id SERIAL,
 	value text NOT NULL UNIQUE,
 	users_id integer REFERENCES users (id) ON DELETE CASCADE
@@ -23,8 +25,10 @@ const (
 	updateUserQuery = `UPDATE users SET (name)=(:name);`
 	deleteUseQuery  = `DELETE FROM users WHERE id=:id;`
 
-	addTokenQuery  = `INSERT INTO token (value, users_id) VALUES ($1, $2) RETURNING id;`
-	getTokensQuery = `SELECT id, value FROM token WHERE users_id=$1;`
+	addTokenQuery    = `INSERT INTO tokens (value, users_id) VALUES ($1, $2) RETURNING id;`
+	getTokensQuery   = `SELECT id, value FROM tokens WHERE users_id=$1;`
+	checkTokenQuery  = `SELECT count(*) FROM tokens WHERE users_id=$1 AND value=$2;`
+	deleteTokenQuery = `DELETE FROM tokens WHERE users_id=$1 AND value=$2;`
 )
 
 // User represents an user
@@ -33,6 +37,7 @@ type User struct {
 	Name string
 }
 
+// Token represents a token
 type Token struct {
 	ID    int
 	Value string
@@ -77,6 +82,7 @@ func (u *User) Delete(ex *sqlx.DB) error {
 	return nil
 }
 
+// GetTokens returns all tokens owned by the user
 func (u *User) GetTokens(ex *sqlx.DB) ([]*Token, error) {
 	tokens := []*Token{}
 	err := ex.Select(&tokens, getTokensQuery, u.ID)
@@ -86,6 +92,7 @@ func (u *User) GetTokens(ex *sqlx.DB) ([]*Token, error) {
 	return tokens, nil
 }
 
+// NewToken generates a new token for the user
 func (u *User) NewToken(ex *sqlx.DB) (*Token, error) {
 	t := &Token{
 		Value: random.String(50),
@@ -100,10 +107,28 @@ func (u *User) NewToken(ex *sqlx.DB) (*Token, error) {
 	return t, nil
 }
 
-func (u *User) CheckToken(ex *sqlx.DB, value string) error {
-	return nil
+// CheckToken checks if specified value exists in token's values for the user
+func (u *User) CheckToken(ex *sqlx.DB, value string) (bool, error) {
+	var count int
+	err := ex.QueryRowx(checkTokenQuery, u.ID, value).Scan(&count)
+	if err != nil {
+		return false, err
+	}
+	if count != 1 {
+		return false, nil
+	}
+	return true, nil
 }
 
+// DeleteToken delete token by value
 func (u *User) DeleteToken(ex *sqlx.DB, value string) error {
+	r, err := ex.Exec(deleteTokenQuery, u.ID, value)
+	if err != nil {
+		return err
+	}
+	count, _ := r.RowsAffected()
+	if count != 1 {
+		return fmt.Errorf("Unexpected number of row deleted: %d", count)
+	}
 	return nil
 }

users_test.go

@@ -12,7 +12,7 @@ import (
 )
 
 const drop = `
-DROP TABLE token;
+DROP TABLE tokens;
 DROP TABLE users;`
 
 var db *sqlx.DB
@@ -109,6 +109,7 @@ func TestTokenAddDelete(t *testing.T) {
 		// Add many token
 		_, err = u.NewToken(db)
 		_, err = u.NewToken(db)
+		token, err := u.NewToken(db)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -118,13 +119,32 @@ func TestTokenAddDelete(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
+		if len(tokens) != 3 {
+			t.Fatalf("Unexpected number of token: %q", len(tokens))
+		}
+
+		// Delete token
+		err = u.DeleteToken(db, token.Value)
+		if err != nil {
+			t.Fatal(err)
+		}
+		tokens, _ = u.GetTokens(db)
 		if len(tokens) != 2 {
 			t.Fatalf("Unexpected number of token: %q", len(tokens))
 		}
 
+		// Delete a fake token
+		err = u.DeleteToken(db, "plop")
+		if err == nil {
+			t.Fatalf("We expect an error when try to delete a fake token")
+		}
+		if err.Error() != "Unexpected number of row deleted: 0" {
+			t.Fatalf("Unexpected error: %q", err)
+		}
+
 		// Remove user and test auto delete token
 		u.Delete(db)
-		q := `SELECT count(*) FROM token WHERE users_id=$1;`
+		q := `SELECT count(*) FROM tokens WHERE users_id=$1;`
 		var count int
 		err = db.QueryRowx(q, u.ID).Scan(&count)
 		if err != nil {
@@ -136,3 +156,29 @@ func TestTokenAddDelete(t *testing.T) {
 
 	})
 }
+
+func TestTokenCheck(t *testing.T) {
+	sqltest.RunWithSchema(db, usersCreate, drop, t, func(db *sqlx.DB, t *testing.T) {
+		u := &User{Name: "plop"}
+		u.Add(db)
+		token, err := u.NewToken(db)
+
+		ok, err := u.CheckToken(db, token.Value)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !ok {
+			t.Fatalf("Token not found")
+		}
+
+		// test fake token
+		ok, err = u.CheckToken(db, "plop")
+		if err != nil {
+			t.Fatal(err)
+		}
+		if ok {
+			t.Fatalf("Token found otherwise we don't expect")
+		}
+
+	})
+}