Initial commit: DSH Web Manager

2026-10-13 09:34:47 +08:00
commit 85332bbc56
135 changed files with 19712 additions and 0 deletions
@@ -0,0 +1,133 @@
+package store
+
+import (
+	"database/sql"
+	"errors"
+	"time"
+)
+
+var ErrInstanceLimit = errors.New("instance limit reached")
+var ErrIntentState = errors.New("intent is no longer waiting")
+
+type Intent struct {
+	ID         string `json:"id"`
+	UID        string `json:"uid"`
+	Name       string `json:"name"`
+	Version    string `json:"version"`
+	BuildID    string `json:"build_id"`
+	InstanceID string `json:"instance_id"`
+	Status     string `json:"status"`
+	Error      string `json:"error"`
+	Host       string `json:"-"`
+	Created    int64  `json:"created_at"`
+}
+
+func (s *Store) EnsureIntents() error {
+	_, err := s.DB.Exec(`CREATE TABLE IF NOT EXISTS creation_intents(id TEXT PRIMARY KEY,uid TEXT NOT NULL,name TEXT NOT NULL,version TEXT NOT NULL,build_id TEXT NOT NULL DEFAULT '',instance_id TEXT NOT NULL DEFAULT '',status TEXT NOT NULL,error TEXT NOT NULL DEFAULT '',host TEXT NOT NULL,created INTEGER NOT NULL); CREATE INDEX IF NOT EXISTS intents_owner ON creation_intents(uid,status);`)
+	return err
+}
+
+func reserveSlot(tx *sql.Tx, uid string) error {
+	var count int
+	if err := tx.QueryRow(`SELECT (SELECT count(*) FROM instances WHERE uid=?) + (SELECT count(*) FROM creation_intents WHERE uid=? AND status='waiting')`, uid, uid).Scan(&count); err != nil {
+		return err
+	}
+	if count >= 2 {
+		return ErrInstanceLimit
+	}
+	return nil
+}
+
+func (s *Store) ReserveIntent(i Intent) error {
+	tx, err := s.DB.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+	if err = reserveSlot(tx, i.UID); err != nil {
+		return err
+	}
+	_, err = tx.Exec(`INSERT INTO creation_intents(id,uid,name,version,status,host,created) VALUES(?,?,?,?,'waiting',?,?)`, i.ID, i.UID, i.Name, i.Version, i.Host, time.Now().Unix())
+	if err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+func (s *Store) ReserveInstance(i Instance) error {
+	tx, err := s.DB.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+	if err = reserveSlot(tx, i.UID); err != nil {
+		return err
+	}
+	if err = insertInstance(tx, i); err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+func insertInstance(tx *sql.Tx, i Instance) error {
+	_, err := tx.Exec(`INSERT INTO instances VALUES(?,?,?,?,?,?,?,?)`, i.ID, i.UID, i.Name, i.Version, i.ImageID, i.Status, i.ContainerID, time.Now().Unix())
+	return err
+}
+func (s *Store) ClaimIntent(id string, i Instance) error {
+	tx, err := s.DB.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+	result, err := tx.Exec(`UPDATE creation_intents SET status='creating',instance_id=? WHERE id=? AND uid=? AND version=? AND status='waiting'`, i.ID, id, i.UID, i.Version)
+	if err != nil {
+		return err
+	}
+	n, err := result.RowsAffected()
+	if err != nil {
+		return err
+	}
+	if n != 1 {
+		return ErrIntentState
+	}
+	if err = insertInstance(tx, i); err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+func (s *Store) CancelIntent(id, uid string) error {
+	r, err := s.DB.Exec(`UPDATE creation_intents SET status='cancelled' WHERE id=? AND uid=? AND status='waiting'`, id, uid)
+	if err != nil {
+		return err
+	}
+	n, err := r.RowsAffected()
+	if err != nil {
+		return err
+	}
+	if n != 1 {
+		return ErrIntentState
+	}
+	return nil
+}
+func (s *Store) Intents(uid string) ([]Intent, error) {
+	query := `SELECT id,uid,name,version,build_id,instance_id,status,error,host,created FROM creation_intents`
+	var args []any
+	if uid != "" {
+		query += ` WHERE uid=?`
+		args = append(args, uid)
+	}
+	query += ` ORDER BY created,id`
+	rows, err := s.DB.Query(query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	out := []Intent{}
+	for rows.Next() {
+		var i Intent
+		if err = rows.Scan(&i.ID, &i.UID, &i.Name, &i.Version, &i.BuildID, &i.InstanceID, &i.Status, &i.Error, &i.Host, &i.Created); err != nil {
+			return nil, err
+		}
+		out = append(out, i)
+	}
+	return out, rows.Err()
+}