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queries.go
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queries.go
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package database
import (
"database/sql"
"time"
)
func (db *Database) InsertUser(user User) (User, error) {
_, err := db.database.Exec("INSERT INTO users(uuid, username) VALUES (?, ?)", user.UUID, user.Username)
return user, err
}
func (db *Database) FindUser(username string) (*User, error) {
var user User
err := db.database.QueryRow("SELECT uuid, username FROM users WHERE username = ? LIMIT 1", username).Scan(&user.UUID, &user.Username)
if err != nil {
return nil, err
}
return &user, nil
}
func (db *Database) InsertMessage(message Message) (Message, error) {
_, err := db.database.Exec("INSERT INTO messages(uuid, content, sender, recipient, created_at) VALUES (?, ?, ?, ?, ?)",
message.UUID, message.Content, message.Sender.UUID, message.Recipient.UUID, message.CreatedAt.Format(time.RFC3339Nano))
return message, err
}
func (db *Database) FindMessagesForUser(user User, from time.Time, offset uint64, limit uint64) ([]Message, error) {
rows, err := db.database.Query(`
SELECT messages.uuid, messages.content, messages.created_at, senderUser.uuid, senderUser.username, recipientUser.uuid, recipientUser.username FROM messages
LEFT JOIN users senderUser ON senderUser.uuid = messages.sender LEFT JOIN users recipientUser ON recipientUser.uuid = messages.recipient
WHERE recipient = ? AND created_at >= ? ORDER BY messages.created_at LIMIT ? OFFSET ?
`, user.UUID, from.Format(time.RFC3339Nano), limit, offset)
if err != nil {
return nil, err
}
defer rows.Close()
return parseMessages(rows)
}
func (db *Database) FindMessagesForUserFromSender(user User, sender User, from time.Time, offset uint64, limit uint64) ([]Message, error) {
rows, err := db.database.Query(`
SELECT messages.uuid, messages.content, messages.created_at, senderUser.uuid, senderUser.username, recipientUser.uuid, recipientUser.username FROM messages
LEFT JOIN users senderUser ON senderUser.uuid = messages.sender LEFT JOIN users recipientUser ON recipientUser.uuid = messages.recipient
WHERE recipient = ? and sender = ? AND created_at >= ? ORDER BY messages.created_at LIMIT ? OFFSET ?
`, user.UUID, sender.UUID, from.Format(time.RFC3339Nano), limit, offset)
if err != nil {
return nil, err
}
defer rows.Close()
return parseMessages(rows)
}
func parseMessages(rows *sql.Rows) ([]Message, error) {
messages := make([]Message, 0)
for rows.Next() {
var message Message
var createdAtString string
err := rows.Scan(&message.UUID, &message.Content, &createdAtString, &message.Sender.UUID, &message.Sender.Username, &message.Recipient.UUID, &message.Recipient.Username)
if err != nil {
return messages, err
}
message.CreatedAt, err = time.Parse(time.RFC3339Nano, createdAtString)
message.CreatedAt = message.CreatedAt.In(time.UTC)
if err != nil {
return messages, err
}
messages = append(messages, message)
}
return messages, nil
}