feat: add phase 3 readonly models

internal/runtime/store.go

@@ -0,0 +1,157 @@
+package runtime
+
+import (
+	"database/sql"
+	"errors"
+	"net/url"
+	"os"
+	"strings"
+
+	"codex-agent-manager/internal/codexhome"
+
+	_ "modernc.org/sqlite"
+)
+
+type Store struct {
+	CodexHome string
+}
+
+func (s Store) Snapshot() (Snapshot, error) {
+	statePath, err := codexhome.ResolveInside(s.CodexHome, "state_5.sqlite")
+	if err != nil {
+		return Snapshot{}, err
+	}
+	goalsPath, err := codexhome.ResolveInside(s.CodexHome, "goals_1.sqlite")
+	if err != nil {
+		return Snapshot{}, err
+	}
+	stateExists := fileExists(statePath)
+	goalsExists := fileExists(goalsPath)
+	if !stateExists && !goalsExists {
+		return Snapshot{
+			Threads:    []Thread{},
+			SpawnEdges: []SpawnEdge{},
+			Goals:      []Goal{},
+			Source: SourceEvidence{
+				Kind:       "sqlite_missing",
+				Confidence: "low",
+				Message:    "Codex SQLite files were not found; returning an empty read-only snapshot.",
+			},
+		}, nil
+	}
+
+	snapshot := Snapshot{
+		Threads:    []Thread{},
+		SpawnEdges: []SpawnEdge{},
+		Goals:      []Goal{},
+		Source:     SourceEvidence{Kind: "sqlite_readonly", Path: statePath, Confidence: "high"},
+	}
+	if stateExists {
+		db, err := openReadonlySQLite(statePath)
+		if err != nil {
+			return Snapshot{}, err
+		}
+		defer db.Close()
+		snapshot.Threads, err = readThreads(db, statePath)
+		if err != nil {
+			return Snapshot{}, err
+		}
+		snapshot.SpawnEdges, err = readSpawnEdges(db, statePath)
+		if err != nil {
+			return Snapshot{}, err
+		}
+	}
+	if goalsExists {
+		db, err := openReadonlySQLite(goalsPath)
+		if err != nil {
+			return Snapshot{}, err
+		}
+		defer db.Close()
+		snapshot.Goals, err = readGoals(db, goalsPath)
+		if err != nil {
+			return Snapshot{}, err
+		}
+	}
+	return snapshot, nil
+}
+
+func openReadonlySQLite(path string) (*sql.DB, error) {
+	uri := url.URL{Scheme: "file", Path: path}
+	query := uri.Query()
+	query.Set("mode", "ro")
+	query.Set("immutable", "1")
+	uri.RawQuery = query.Encode()
+	return sql.Open("sqlite", uri.String())
+}
+
+func readThreads(db *sql.DB, sourcePath string) ([]Thread, error) {
+	rows, err := db.Query(`SELECT id, role, status, created_at, updated_at FROM threads ORDER BY created_at, id`)
+	if err != nil {
+		if isMissingTable(err) {
+			return []Thread{}, nil
+		}
+		return nil, err
+	}
+	defer rows.Close()
+	var threads []Thread
+	for rows.Next() {
+		var item Thread
+		if err := rows.Scan(&item.ID, &item.Role, &item.Status, &item.CreatedAt, &item.UpdatedAt); err != nil {
+			return nil, err
+		}
+		item.Source = SourceEvidence{Kind: "sqlite_table", Path: sourcePath, Confidence: "high"}
+		threads = append(threads, item)
+	}
+	return threads, rows.Err()
+}
+
+func readSpawnEdges(db *sql.DB, sourcePath string) ([]SpawnEdge, error) {
+	rows, err := db.Query(`SELECT from_thread_id, to_thread_id, reason, created_at FROM thread_spawn_edges ORDER BY created_at, from_thread_id, to_thread_id`)
+	if err != nil {
+		if isMissingTable(err) {
+			return []SpawnEdge{}, nil
+		}
+		return nil, err
+	}
+	defer rows.Close()
+	var edges []SpawnEdge
+	for rows.Next() {
+		var item SpawnEdge
+		if err := rows.Scan(&item.FromThreadID, &item.ToThreadID, &item.Reason, &item.CreatedAt); err != nil {
+			return nil, err
+		}
+		item.Source = SourceEvidence{Kind: "sqlite_table", Path: sourcePath, Confidence: "high"}
+		edges = append(edges, item)
+	}
+	return edges, rows.Err()
+}
+
+func readGoals(db *sql.DB, sourcePath string) ([]Goal, error) {
+	rows, err := db.Query(`SELECT thread_id, goal, status, updated_at FROM thread_goals ORDER BY updated_at, thread_id`)
+	if err != nil {
+		if isMissingTable(err) {
+			return []Goal{}, nil
+		}
+		return nil, err
+	}
+	defer rows.Close()
+	var goals []Goal
+	for rows.Next() {
+		var item Goal
+		if err := rows.Scan(&item.ThreadID, &item.Goal, &item.Status, &item.UpdatedAt); err != nil {
+			return nil, err
+		}
+		item.Source = SourceEvidence{Kind: "sqlite_table", Path: sourcePath, Confidence: "high"}
+		goals = append(goals, item)
+	}
+	return goals, rows.Err()
+}
+
+func fileExists(path string) bool {
+	info, err := os.Stat(path)
+	return err == nil && !info.IsDir()
+}
+
+func isMissingTable(err error) bool {
+	return err != nil && (strings.Contains(err.Error(), "no such table") || errors.Is(err, sql.ErrNoRows))
+}