521 lines
14 KiB
Go
521 lines
14 KiB
Go
package service
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import (
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"axolotl/models"
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"database/sql"
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"errors"
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"fmt"
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"maps"
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"math/rand"
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"os"
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"path/filepath"
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"regexp"
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"slices"
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"strings"
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"time"
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_ "modernc.org/sqlite"
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)
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type sqliteNodeService struct {
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db *sql.DB
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userID string
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}
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var migrations = []string{
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`CREATE TABLE IF NOT EXISTS nodes (id TEXT PRIMARY KEY, title TEXT NOT NULL, content TEXT, due_date TEXT, created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP, updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP)`,
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`CREATE TABLE IF NOT EXISTS tags (node_id TEXT NOT NULL, tag TEXT NOT NULL, PRIMARY KEY (node_id, tag), FOREIGN KEY (node_id) REFERENCES nodes(id) ON DELETE CASCADE)`,
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`CREATE TABLE IF NOT EXISTS rels (from_id TEXT NOT NULL, to_id TEXT NOT NULL, rel_type TEXT NOT NULL, PRIMARY KEY (from_id, to_id, rel_type), FOREIGN KEY (from_id) REFERENCES nodes(id) ON DELETE CASCADE, FOREIGN KEY (to_id) REFERENCES nodes(id) ON DELETE CASCADE)`,
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`CREATE INDEX IF NOT EXISTS idx_tags_tag ON tags(tag)`, `CREATE INDEX IF NOT EXISTS idx_rels_from ON rels(from_id)`, `CREATE INDEX IF NOT EXISTS idx_rels_to ON rels(to_id)`,
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}
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var mentionRegex = regexp.MustCompile(`@([a-z0-9_]+)`)
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func mentions(t string) []string {
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seen := make(map[string]bool)
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for _, m := range mentionRegex.FindAllStringSubmatch(t, -1) {
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seen[m[1]] = true
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}
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return slices.Collect(maps.Keys(seen))
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}
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func InitSqliteDB(path string) error {
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if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
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return err
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}
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var err error
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db, err := sql.Open("sqlite", path)
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if err != nil {
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return err
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}
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for _, q := range append([]string{"PRAGMA journal_mode=WAL", "PRAGMA busy_timeout=5000", "PRAGMA foreign_keys=ON"}, migrations...) {
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if _, err := db.Exec(q); err != nil {
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return err
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}
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}
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return err
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}
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func GetSqliteDB(cfg Config) (*sql.DB, error) {
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dir, err := filepath.Abs(".")
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if err != nil {
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return nil, err
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}
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for {
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dbpath := filepath.Join(dir, ".ax.db")
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if _, err := os.Stat(dbpath); err == nil {
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db, err := sql.Open("sqlite", dbpath)
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if err != nil {
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return nil, fmt.Errorf("failed to open database: %w", err)
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}
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return db, nil
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}
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if parent := filepath.Dir(dir); parent == dir {
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return nil, errors.New("no .ax.db found (run 'ax init' first)")
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} else {
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dir = parent
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}
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}
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}
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func (s *sqliteNodeService) GetByID(id string) (*models.Node, error) {
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n := models.NewNode()
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q := s.db.QueryRow("SELECT id, title, COALESCE(content, ''), COALESCE(due_date, ''), created_at, updated_at FROM nodes WHERE id = ?", id)
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if err := q.Scan(&n.ID, &n.Title, &n.Content, &n.DueDate, &n.CreatedAt, &n.UpdatedAt); err != nil {
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return nil, err
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}
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if rows, err := s.db.Query("SELECT tag FROM tags WHERE node_id = ?", id); err == nil {
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defer rows.Close()
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for rows.Next() {
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var tag string
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rows.Scan(&tag)
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n.AddTag(tag)
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}
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} else {
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return nil, err
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}
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if rows, err := s.db.Query("SELECT to_id, rel_type FROM rels WHERE from_id = ?", id); err == nil {
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defer rows.Close()
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for rows.Next() {
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var toID, relType string
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rows.Scan(&toID, &relType)
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n.AddRelation(models.RelType(relType), toID)
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}
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} else {
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return nil, err
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}
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return n, nil
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}
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func (s *sqliteNodeService) Exists(id string) (bool, error) {
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var e bool
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err := s.db.QueryRow("SELECT EXISTS(SELECT 1 FROM nodes WHERE id = ?)", id).Scan(&e)
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return e, err
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}
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func (s *sqliteNodeService) Delete(id string) error {
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_, err := s.db.Exec("DELETE FROM nodes WHERE id = ?", id)
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return err
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}
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func (s *sqliteNodeService) CanClose(id string) (bool, []string, error) {
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rows, err := s.db.Query("SELECT to_id FROM rels WHERE from_id = ? AND rel_type = ?", id, models.RelBlocks)
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if err != nil {
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return false, nil, err
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}
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defer rows.Close()
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var blocking []string
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for rows.Next() {
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var bID, tag string
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if err := rows.Scan(&bID); err != nil {
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return false, nil, err
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}
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if err := s.db.QueryRow("SELECT tag FROM tags WHERE node_id = ? AND tag LIKE '_status::%'", bID).Scan(&tag); err == sql.ErrNoRows {
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continue
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} else if err != nil {
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return false, nil, err
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}
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if strings.HasSuffix(tag, "::open") {
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blocking = append(blocking, bID)
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}
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}
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return len(blocking) == 0, blocking, nil
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}
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func genID() string {
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b := make([]byte, 5)
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for i := range b {
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b[i] = "abcdefghijklmnopqrstuvwxyz"[rand.Intn(26)]
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}
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return string(b)
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}
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func (s *sqliteNodeService) generateUniqueID() string {
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for {
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id := genID()
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if exists, _ := s.Exists(id); !exists {
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return id
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}
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}
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}
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func (s *sqliteNodeService) Create(title, content, dueDate string, tags []string, rels map[models.RelType][]string) (*models.Node, error) {
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tx, err := s.db.Begin()
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if err != nil {
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return nil, err
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}
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defer tx.Rollback()
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now, id := time.Now().UTC().Format(time.RFC3339), s.generateUniqueID()
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if _, err := tx.Exec("INSERT INTO nodes (id, title, content, due_date, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?)",
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id, title, content, dueDate, now, now); err != nil {
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return nil, err
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}
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for _, m := range mentions(title + " " + content) {
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userID, err := s.resolveUserRef(tx, m)
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if err != nil {
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return nil, err
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}
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if _, err := tx.Exec("INSERT INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)", id, userID, models.RelMentions); err != nil {
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return nil, err
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}
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}
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for _, t := range tags {
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if _, err := tx.Exec("INSERT INTO tags (node_id, tag) VALUES (?, ?)", id, t); err != nil {
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return nil, err
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}
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}
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hasCreated := false
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for rt, tgts := range rels {
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for _, tgt := range tgts {
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if rt == models.RelCreated {
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hasCreated = true
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}
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if rt == models.RelAssignee || rt == models.RelCreated {
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var err error
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if tgt, err = s.resolveUserRef(tx, tgt); err != nil {
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return nil, err
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}
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}
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if rt == models.RelInNamespace {
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var err error
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if tgt, err = s.resolveNamespaceRef(tx, tgt); err != nil {
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return nil, err
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}
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}
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if _, err := tx.Exec("INSERT INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)", id, tgt, rt); err != nil {
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return nil, err
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}
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}
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}
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if !hasCreated {
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userID, err := s.resolveUserRef(tx, s.userID)
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if err != nil {
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return nil, err
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}
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if _, err := tx.Exec("INSERT INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)", id, userID, models.RelCreated); err != nil {
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return nil, err
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}
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}
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if err := tx.Commit(); err != nil {
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return nil, err
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}
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return s.GetByID(id)
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}
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func (s *sqliteNodeService) Update(node *models.Node) error {
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current, err := s.GetByID(node.ID)
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if err != nil {
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return err
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}
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tx, err := s.db.Begin()
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if err != nil {
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return err
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}
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defer tx.Rollback()
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upd := func(col, val string) error {
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_, err := tx.Exec("UPDATE nodes SET "+col+" = ? WHERE id = ?", val, node.ID)
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return err
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}
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newTitle, newContent := current.Title, current.Content
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if node.Title != current.Title {
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if err := upd("title", node.Title); err != nil {
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return err
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}
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newTitle = node.Title
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}
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if node.Content != current.Content {
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if err := upd("content", node.Content); err != nil {
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return err
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}
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newContent = node.Content
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}
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if node.DueDate != current.DueDate {
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if node.DueDate == "" {
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if _, err := tx.Exec("UPDATE nodes SET due_date = NULL WHERE id = ?", node.ID); err != nil {
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return err
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}
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} else {
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if err := upd("due_date", node.DueDate); err != nil {
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return err
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}
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}
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}
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if node.Title != current.Title || node.Content != current.Content {
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newMentions := mentions(newTitle + " " + newContent)
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rows, err := tx.Query("SELECT to_id FROM rels WHERE from_id = ? AND rel_type = ?", node.ID, models.RelMentions)
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if err != nil {
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return err
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}
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existingMentionIDs := make(map[string]bool)
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for rows.Next() {
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var uid string
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if err := rows.Scan(&uid); err != nil {
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rows.Close()
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return err
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}
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existingMentionIDs[uid] = true
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}
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rows.Close()
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mentionedUserIDs := make(map[string]bool)
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for _, m := range newMentions {
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userID, err := s.resolveUserRef(tx, m)
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if err != nil {
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return err
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}
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mentionedUserIDs[userID] = true
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if !existingMentionIDs[userID] {
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if _, err := tx.Exec("INSERT INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)", node.ID, userID, models.RelMentions); err != nil {
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return err
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}
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}
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}
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for uid := range existingMentionIDs {
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if !mentionedUserIDs[uid] {
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if _, err := tx.Exec("DELETE FROM rels WHERE from_id = ? AND to_id = ? AND rel_type = ?", node.ID, uid, models.RelMentions); err != nil {
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return err
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}
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}
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}
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}
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currentTags := current.Tags()
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nodeTags := node.Tags()
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for _, t := range currentTags {
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if !slices.Contains(nodeTags, t) {
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tx.Exec("DELETE FROM tags WHERE node_id = ? AND tag = ?", node.ID, t)
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}
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}
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for _, t := range nodeTags {
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if !slices.Contains(currentTags, t) {
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tx.Exec("INSERT OR IGNORE INTO tags (node_id, tag) VALUES (?, ?)", node.ID, t)
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}
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}
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currentRels := current.Relations()
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nodeRels := node.Relations()
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for rt, tgts := range currentRels {
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for _, tgt := range tgts {
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if nodeRels[rt] == nil || !slices.Contains(nodeRels[rt], tgt) {
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tx.Exec("DELETE FROM rels WHERE from_id = ? AND to_id = ? AND rel_type = ?", node.ID, tgt, rt)
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}
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}
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}
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for rt, tgts := range nodeRels {
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for _, tgt := range tgts {
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if currentRels[rt] == nil || !slices.Contains(currentRels[rt], tgt) {
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resolvedTgt := tgt
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if models.RelType(rt) == models.RelAssignee || models.RelType(rt) == models.RelCreated {
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var err error
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if resolvedTgt, err = s.resolveUserRef(tx, tgt); err != nil {
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return err
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}
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}
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if models.RelType(rt) == models.RelInNamespace {
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var err error
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if resolvedTgt, err = s.resolveNamespaceRef(tx, tgt); err != nil {
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return err
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}
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}
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tx.Exec("INSERT OR IGNORE INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)", node.ID, resolvedTgt, rt)
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}
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}
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}
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if _, err := tx.Exec("UPDATE nodes SET updated_at = ? WHERE id = ?", time.Now().UTC().Format(time.RFC3339), node.ID); err != nil {
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return err
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}
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return tx.Commit()
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}
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func (s *sqliteNodeService) resolveIDByNameAndTypeTx(tx *sql.Tx, title, nodeType string) (string, error) {
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var id string
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query := `
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SELECT n.id FROM nodes n
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JOIN tags t ON n.id = t.node_id
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WHERE n.title = ? AND t.tag = ?
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LIMIT 1
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`
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tag := "_type::" + nodeType
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var err error
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if tx != nil {
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err = tx.QueryRow(query, title, tag).Scan(&id)
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} else {
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err = s.db.QueryRow(query, title, tag).Scan(&id)
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}
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if err == sql.ErrNoRows {
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return "", nil
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}
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return id, err
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}
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func (s *sqliteNodeService) resolveUserIDByNameTx(tx *sql.Tx, username string) (string, error) {
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return s.resolveIDByNameAndTypeTx(tx, username, "user")
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}
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func (s *sqliteNodeService) resolveUserIDByName(username string) (string, error) {
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return s.resolveUserIDByNameTx(nil, username)
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}
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func (s *sqliteNodeService) resolveNamespaceIDByNameTx(tx *sql.Tx, name string) (string, error) {
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return s.resolveIDByNameAndTypeTx(tx, name, "namespace")
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}
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func (s *sqliteNodeService) resolveNamespaceIDByName(name string) (string, error) {
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return s.resolveNamespaceIDByNameTx(nil, name)
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}
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func (s *sqliteNodeService) List(opts ...ListOption) ([]*models.Node, error) {
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f := &listFilter{}
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for _, opt := range opts {
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opt(f)
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}
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q, joins, whereConds, havingConds := "SELECT DISTINCT n.id FROM nodes n", []string{}, []string{}, []string{}
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var whereArgs, havingArgs []any
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if len(f.tagPrefixes) == 0 {
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f.tagPrefixes = append(f.tagPrefixes, "")
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}
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joins = append(joins, "JOIN tags t_tag ON n.id = t_tag.node_id")
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cond := ""
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for _, t := range f.tagPrefixes {
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cond += "t_tag.tag LIKE ? || '%' OR "
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havingArgs = append(havingArgs, t)
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}
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havingConds = append(havingConds, "SUM(CASE WHEN "+cond[:len(cond)-4]+" THEN 1 ELSE 0 END) >= ?")
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havingArgs = append(havingArgs, len(f.tagPrefixes))
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if len(joins) > 0 {
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q += " " + strings.Join(joins, " ") + " "
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}
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if len(whereConds) > 0 {
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q += " WHERE " + strings.Join(whereConds, " AND ")
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}
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q += " GROUP BY n.id"
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if len(havingConds) > 0 {
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q += " HAVING " + strings.Join(havingConds, " AND ")
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}
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args := append(whereArgs, havingArgs...)
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rows, err := s.db.Query(q+" ORDER BY n.created_at DESC", args...)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var nodes []*models.Node
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for rows.Next() {
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var id string
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if err := rows.Scan(&id); err != nil {
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return nil, err
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}
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if n, err := s.GetByID(id); err == nil {
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nodes = append(nodes, n)
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} else {
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return nil, err
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}
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}
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return nodes, nil
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}
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func (s *sqliteNodeService) resolveUserRef(tx *sql.Tx, ref string) (string, error) {
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if exists, _ := s.Exists(ref); exists {
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return ref, nil
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}
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return s.ensureUser(tx, ref)
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}
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func (s *sqliteNodeService) ensureUser(tx *sql.Tx, username string) (string, error) {
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userID, err := s.resolveUserIDByNameTx(tx, username)
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if err != nil {
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return "", err
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}
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if userID != "" {
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return userID, nil
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}
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id := s.generateUniqueID()
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now := time.Now().UTC().Format(time.RFC3339)
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if _, err := tx.Exec("INSERT INTO nodes (id, title, created_at, updated_at) VALUES (?, ?, ?, ?)",
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id, username, now, now); err != nil {
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return "", err
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}
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if _, err := tx.Exec("INSERT INTO tags (node_id, tag) VALUES (?, '_type::user')", id); err != nil {
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return "", err
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}
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return id, nil
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}
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func (s *sqliteNodeService) resolveNamespaceRef(tx *sql.Tx, ref string) (string, error) {
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if exists, _ := s.Exists(ref); exists {
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return ref, nil
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}
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return s.ensureNamespace(tx, ref)
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}
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func (s *sqliteNodeService) ensureNamespace(tx *sql.Tx, name string) (string, error) {
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nsID, err := s.resolveNamespaceIDByNameTx(tx, name)
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if err != nil {
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return "", err
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}
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if nsID != "" {
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return nsID, nil
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}
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id := s.generateUniqueID()
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now := time.Now().UTC().Format(time.RFC3339)
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if _, err := tx.Exec("INSERT INTO nodes (id, title, created_at, updated_at) VALUES (?, ?, ?, ?)",
|
|
id, name, now, now); err != nil {
|
|
return "", err
|
|
}
|
|
if _, err := tx.Exec("INSERT INTO tags (node_id, tag) VALUES (?, '_type::namespace')", id); err != nil {
|
|
return "", err
|
|
}
|
|
if _, err := tx.Exec("INSERT INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)",
|
|
id, id, models.RelInNamespace); err != nil {
|
|
return "", err
|
|
}
|
|
userID, err := s.resolveUserRef(tx, s.userID)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if _, err := tx.Exec("INSERT INTO rels (from_id, to_id, rel_type) VALUES (?, ?, ?)",
|
|
id, userID, models.RelCreated); err != nil {
|
|
return "", err
|
|
}
|
|
return id, nil
|
|
}
|