federationout.go

// Copyright 2020 the Exposure Notifications Server authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Package database is a database interface to federation out.
package database

import (
	"context"
	"errors"
	"fmt"

	"github.com/google/exposure-notifications-server/internal/federationin/model"
	"github.com/google/exposure-notifications-server/pkg/database"
	pgx "github.com/jackc/pgx/v4"
)

type FederationOutDB struct {
	db *database.DB
}

func New(db *database.DB) *FederationOutDB {
	return &FederationOutDB{
		db: db,
	}
}

// AddFederationOutAuthorization adds or updates a FederationOutAuthorization record.
func (db *FederationOutDB) AddFederationOutAuthorization(ctx context.Context, auth *model.FederationOutAuthorization) error {
	return db.db.InTx(ctx, pgx.ReadCommitted, func(tx pgx.Tx) error {
		q := `
			INSERT INTO
				FederationOutAuthorization
				(oidc_issuer, oidc_subject, oidc_audience, note, include_regions, exclude_regions)
			VALUES
				($1, $2, $3, $4, $5, $6)
			ON CONFLICT ON CONSTRAINT
				federation_authorization_pk
			DO UPDATE
				SET oidc_audience = $3, note = $4, include_regions = $5, exclude_regions = $6
		`
		_, err := tx.Exec(ctx, q, auth.Issuer, auth.Subject, auth.Audience, auth.Note, auth.IncludeRegions, auth.ExcludeRegions)
		if err != nil {
			return fmt.Errorf("upserting federation authorization: %w", err)
		}
		return nil
	})
}

// GetFederationOutAuthorization returns a FederationOutAuthorization record, or ErrNotFound if not found.
func (db *FederationOutDB) GetFederationOutAuthorization(ctx context.Context, issuer, subject string) (*model.FederationOutAuthorization, error) {
	var auth model.FederationOutAuthorization

	if err := db.db.InTx(ctx, pgx.ReadCommitted, func(tx pgx.Tx) error {
		row := tx.QueryRow(ctx, `
			SELECT
				oidc_issuer, oidc_subject, oidc_audience, note, include_regions, exclude_regions
			FROM
				FederationOutAuthorization
			WHERE
				oidc_issuer = $1
			AND
				oidc_subject = $2
			LIMIT 1
		`, issuer, subject)

		if err := row.Scan(&auth.Issuer, &auth.Subject, &auth.Audience, &auth.Note, &auth.IncludeRegions, &auth.ExcludeRegions); err != nil {
			if errors.Is(err, pgx.ErrNoRows) {
				return database.ErrNotFound
			}
			return fmt.Errorf("failed to parse: %w", err)
		}
		return nil
	}); err != nil {
		return nil, fmt.Errorf("get authorized app: %w", err)
	}

	return &auth, nil
}