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Docs in server.yml, schemaVersion table, refactoring

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binwiederhier 2023-06-08 21:45:52 -04:00
parent d3ac976d05
commit 9d38aeb863
7 changed files with 74 additions and 37 deletions

211
server/webpush_store.go Normal file
View file

@ -0,0 +1,211 @@
package server
import (
"database/sql"
"fmt"
"time"
"github.com/SherClockHolmes/webpush-go"
_ "github.com/mattn/go-sqlite3" // SQLite driver
)
const (
createWebPushSubscriptionsTableQuery = `
BEGIN;
CREATE TABLE IF NOT EXISTS subscriptions (
id INTEGER PRIMARY KEY AUTOINCREMENT,
topic TEXT NOT NULL,
user_id TEXT,
endpoint TEXT NOT NULL,
key_auth TEXT NOT NULL,
key_p256dh TEXT NOT NULL,
updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
warning_sent BOOLEAN DEFAULT FALSE
);
CREATE TABLE IF NOT EXISTS schemaVersion (
id INT PRIMARY KEY,
version INT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_topic ON subscriptions (topic);
CREATE INDEX IF NOT EXISTS idx_endpoint ON subscriptions (endpoint);
CREATE UNIQUE INDEX IF NOT EXISTS idx_topic_endpoint ON subscriptions (topic, endpoint);
COMMIT;
`
insertWebPushSubscriptionQuery = `
INSERT OR REPLACE INTO subscriptions (topic, user_id, endpoint, key_auth, key_p256dh)
VALUES (?, ?, ?, ?, ?)
`
deleteWebPushSubscriptionByEndpointQuery = `DELETE FROM subscriptions WHERE endpoint = ?`
deleteWebPushSubscriptionByUserIDQuery = `DELETE FROM subscriptions WHERE user_id = ?`
deleteWebPushSubscriptionsByAgeQuery = `DELETE FROM subscriptions WHERE warning_sent = 1 AND updated_at <= datetime('now', ?)`
selectWebPushSubscriptionsForTopicQuery = `SELECT endpoint, key_auth, key_p256dh, user_id FROM subscriptions WHERE topic = ?`
selectWebPushSubscriptionsExpiringSoonQuery = `SELECT DISTINCT endpoint, key_auth, key_p256dh FROM subscriptions WHERE warning_sent = 0 AND updated_at <= datetime('now', ?)`
updateWarningSentQuery = `UPDATE subscriptions SET warning_sent = true WHERE warning_sent = 0 AND updated_at <= datetime('now', ?)`
)
// Schema management queries
const (
currentWebPushSchemaVersion = 1
insertWebPushSchemaVersion = `INSERT INTO schemaVersion VALUES (1, ?)`
selectWebPushSchemaVersionQuery = `SELECT version FROM schemaVersion WHERE id = 1`
)
type webPushStore struct {
db *sql.DB
}
func newWebPushStore(filename string) (*webPushStore, error) {
db, err := sql.Open("sqlite3", filename)
if err != nil {
return nil, err
}
if err := setupWebPushDB(db); err != nil {
return nil, err
}
return &webPushStore{
db: db,
}, nil
}
func setupWebPushDB(db *sql.DB) error {
// If 'schemaVersion' table does not exist, this must be a new database
rows, err := db.Query(selectWebPushSchemaVersionQuery)
if err != nil {
return setupNewWebPushDB(db)
}
return rows.Close()
}
func setupNewWebPushDB(db *sql.DB) error {
if _, err := db.Exec(createWebPushSubscriptionsTableQuery); err != nil {
return err
}
if _, err := db.Exec(insertWebPushSchemaVersion, currentWebPushSchemaVersion); err != nil {
return err
}
return nil
}
// UpdateSubscriptions updates the subscriptions for the given topics and user ID. It always first deletes all
// existing entries for a given endpoint.
func (c *webPushStore) UpdateSubscriptions(topics []string, userID string, subscription webpush.Subscription) error {
tx, err := c.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
if _, err := tx.Exec(deleteWebPushSubscriptionByEndpointQuery, subscription.Endpoint); err != nil {
return err
}
for _, topic := range topics {
if _, err = tx.Exec(insertWebPushSubscriptionQuery, topic, userID, subscription.Endpoint, subscription.Keys.Auth, subscription.Keys.P256dh); err != nil {
return err
}
}
return tx.Commit()
}
func (c *webPushStore) AddSubscription(topic string, userID string, subscription webpush.Subscription) error {
_, err := c.db.Exec(
insertWebPushSubscriptionQuery,
topic,
userID,
subscription.Endpoint,
subscription.Keys.Auth,
subscription.Keys.P256dh,
)
return err
}
func (c *webPushStore) SubscriptionsForTopic(topic string) (subscriptions []*webPushSubscription, err error) {
rows, err := c.db.Query(selectWebPushSubscriptionsForTopicQuery, topic)
if err != nil {
return nil, err
}
defer rows.Close()
var data []*webPushSubscription
for rows.Next() {
var userID, endpoint, auth, p256dh string
if err = rows.Scan(&endpoint, &auth, &p256dh, &userID); err != nil {
return nil, err
}
data = append(data, &webPushSubscription{
UserID: userID,
BrowserSubscription: webpush.Subscription{
Endpoint: endpoint,
Keys: webpush.Keys{
Auth: auth,
P256dh: p256dh,
},
},
})
}
return data, nil
}
func (c *webPushStore) ExpireAndGetExpiringSubscriptions(warningDuration time.Duration, expiryDuration time.Duration) (subscriptions []webPushSubscription, err error) {
// TODO this should be two functions
tx, err := c.db.Begin()
if err != nil {
return nil, err
}
defer tx.Rollback()
_, err = tx.Exec(deleteWebPushSubscriptionsByAgeQuery, fmt.Sprintf("-%.2f seconds", expiryDuration.Seconds()))
if err != nil {
return nil, err
}
rows, err := tx.Query(selectWebPushSubscriptionsExpiringSoonQuery, fmt.Sprintf("-%.2f seconds", warningDuration.Seconds()))
if err != nil {
return nil, err
}
defer rows.Close()
var data []webPushSubscription
for rows.Next() {
i := webPushSubscription{}
err = rows.Scan(&i.BrowserSubscription.Endpoint, &i.BrowserSubscription.Keys.Auth, &i.BrowserSubscription.Keys.P256dh)
fmt.Printf("%v+", i)
if err != nil {
return nil, err
}
data = append(data, i)
}
// also set warning as sent
_, err = tx.Exec(updateWarningSentQuery, fmt.Sprintf("-%.2f seconds", warningDuration.Seconds()))
if err != nil {
return nil, err
}
if err = tx.Commit(); err != nil {
return nil, err
}
return data, nil
}
func (c *webPushStore) RemoveByEndpoint(endpoint string) error {
_, err := c.db.Exec(
deleteWebPushSubscriptionByEndpointQuery,
endpoint,
)
return err
}
func (c *webPushStore) RemoveByUserID(userID string) error {
_, err := c.db.Exec(
deleteWebPushSubscriptionByUserIDQuery,
userID,
)
return err
}
func (c *webPushStore) Close() error {
return c.db.Close()
}