/
db.go
200 lines (161 loc) · 4.8 KB
/
db.go
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package main
import (
"database/sql"
"github.com/mattn/go-sqlite3"
)
const schema string = `
CREATE TABLE IF NOT EXISTS teams (
id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
askgod_id INTEGER NOT NULL,
askgod_name TEXT,
discourse_name TEXT,
discourse_group_id INTEGER NOT NULL,
discourse_category_id INTEGER NOT NULL
);
CREATE TABLE IF NOT EXISTS posts (
id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
name TEXT,
team_id INTEGER NOT NULL,
discourse_post_id INTEGER NOT NULL,
FOREIGN KEY(team_id) REFERENCES teams (id) ON DELETE CASCADE
);
`
type dbTeam struct {
ID int64
AskgodID int64
AskgodName string
DiscourseName string
DiscourseGroupID int64
DiscourseCategoryID int64
}
func enableForeignKeys(conn *sqlite3.SQLiteConn) error {
_, err := conn.Exec("PRAGMA foreign_keys=ON;", nil)
return err
}
func init() {
sql.Register("sqlite3_with_fk", &sqlite3.SQLiteDriver{ConnectHook: enableForeignKeys})
}
// Connect sets up the database connection and returns a DB struct
func (s *syncer) dbSetup() error {
s.logger.Info("Connecting to the database")
sqlDB, err := sql.Open("sqlite3_with_fk", s.config.Database)
if err != nil {
return err
}
// Setup the DB struct
s.db = sqlDB
// We don't want multiple clients during setup
s.db.SetMaxOpenConns(1)
// Test the connection
err = s.db.Ping()
if err != nil {
return err
}
// Create the DB schema (if needed)
_, err = s.db.Exec(schema)
if err != nil {
return err
}
// Set the connection limit for the DB pool
s.db.SetMaxOpenConns(10)
return nil
}
func (s *syncer) dbGetTeams() ([]dbTeam, error) {
// Return a list of teams
resp := []dbTeam{}
// Query all the teams from the database
rows, err := s.db.Query("SELECT id, askgod_id, askgod_name, discourse_name, discourse_group_id, discourse_category_id FROM teams ORDER BY id ASC;")
if err != nil {
return nil, err
}
defer rows.Close()
// Iterate through the results
for rows.Next() {
row := dbTeam{}
err := rows.Scan(&row.ID, &row.AskgodID, &row.AskgodName, &row.DiscourseName, &row.DiscourseGroupID, &row.DiscourseCategoryID)
if err != nil {
return nil, err
}
resp = append(resp, row)
}
// Check for any error that might have happened
err = rows.Err()
if err != nil {
return nil, err
}
return resp, nil
}
func (s *syncer) dbCreateTeam(askgodID int64, askgodName string, discourseName string, discourseGroupID int64, discourseCategoryID int64) error {
// Create a team DB entry
_, err := s.db.Exec("INSERT INTO teams (askgod_id, askgod_name, discourse_name, discourse_group_id, discourse_category_id) VALUES (?, ?, ?, ?, ?);",
askgodID, askgodName, discourseName, discourseGroupID, discourseCategoryID)
if err != nil {
return err
}
return nil
}
func (s *syncer) dbRenameTeam(discourseGroupID int64, askgodName string) error {
// Change the askgod name on record
_, err := s.db.Exec("UPDATE teams SET askgod_name=? WHERE discourse_group_id=?;", askgodName, discourseGroupID)
if err != nil {
return err
}
return nil
}
func (s *syncer) dbDeleteTeam(discourseName string, discourseGroupID int64, discourseCategoryID int64) error {
// Delete a team DB entry
_, err := s.db.Exec("DELETE FROM teams WHERE discourse_name=? AND discourse_group_id=? AND discourse_category_id=?;", discourseName, discourseGroupID, discourseCategoryID)
if err != nil {
return err
}
return nil
}
func (s *syncer) dbDeletePost(discoursePostID int64) error {
// Delete a team DB entry
_, err := s.db.Exec("DELETE FROM posts WHERE discourse_post_id=?;", discoursePostID)
if err != nil {
return err
}
return nil
}
func (s *syncer) dbGetTeamPosts() (map[int64]map[string][]int64, error) {
// Return a map of askgod teamids to map of post to postid
resp := map[int64]map[string][]int64{}
// Fetch the needed data
rows, err := s.db.Query("SELECT teams.askgod_id, posts.name, posts.discourse_post_id FROM posts LEFT JOIN teams ON teams.id=posts.team_id;")
if err != nil {
return nil, err
}
defer rows.Close()
// Iterate through the results
for rows.Next() {
teamid := int64(-1)
name := ""
postid := int64(-1)
err := rows.Scan(&teamid, &name, &postid)
if err != nil {
return nil, err
}
if resp[teamid] == nil {
resp[teamid] = map[string][]int64{}
}
if resp[teamid][name] == nil {
resp[teamid][name] = []int64{}
}
resp[teamid][name] = append(resp[teamid][name], postid)
}
// Check for any error that might have happened
err = rows.Err()
if err != nil {
return nil, err
}
return resp, nil
}
func (s *syncer) dbCreatePost(askgodID int64, postName string, postID int64) error {
_, err := s.db.Exec("INSERT INTO posts (team_id, name, discourse_post_id) VALUES ((SELECT id FROM teams WHERE askgod_id=?), ?, ?);",
askgodID, postName, postID)
if err != nil {
return err
}
return nil
}