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package dice
import (
"fmt"
"io/fs"
"os"
"path"
"path/filepath"
"slices"
"strings"
"time"
"github.com/pkg/errors"
"github.com/spf13/afero"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"gorm.io/gorm/clause"
"github.com/hashicorp/golang-lru/v2/expirable"
)
type DatabaseLocation string
const (
NO_DATABASE DatabaseLocation = ""
INMEMORY_DATABASE DatabaseLocation = "file::memory:?cache=shared"
)
type Repository interface {
WithTransaction(fn func(*gorm.DB) error) error
connect() (*gorm.DB, error)
changeLocation(l string)
}
type repository struct {
db *gorm.DB
location string
config *gorm.Config
models []any
}
// do whatever within a separate withTransaction
func (r *repository) WithTransaction(fn func(conn *gorm.DB) error) error {
if _, err := r.connect(); err != nil {
return err
}
return r.db.Transaction(func(tx *gorm.DB) error {
return fn(tx) // pass new repo to handler
})
}
func (r *repository) connect() (*gorm.DB, error) {
if r.db != nil {
return r.db, nil
}
db, err := gorm.Open(sqlite.Open(r.location), r.config)
if err != nil {
return nil, errors.Wrapf(err, "failed to open database connection '%s'", r.location)
}
db = db.Exec("PRAGMA foreign_keys = ON")
if err := db.AutoMigrate(r.models...); err != nil {
return nil, err
}
r.db = db
return db, nil
}
func (r *repository) changeLocation(l string) {
r.location = l
r.db = nil
}
type sourceRepo struct {
Repository
conf *Configuration
}
func (r *sourceRepo) addSource(s ...*Source) error {
return r.WithTransaction(func(conn *gorm.DB) error {
sourceQ := conn.Create(s)
if err := sourceQ.Error; err != nil {
return errors.Wrap(err, "failed to create source")
}
return nil
})
}
// Locates source files inside a scan by the name of the source
func (r *sourceRepo) findSourceFiles(globs, ext []string) ([]*Source, error) {
// current workspace
wk := r.conf.WorkspaceFs()
var srcs []*Source
// globs are just fine. It takes some time to iterate through all the
// patterns, but it adds flexibility
withGlob := func(glob string) ([]*Source, error) {
var gSrcs []*Source
err := afero.Walk(wk, ".", func(path string, info fs.FileInfo, err error) error {
if err != nil {
return err
}
match, err := filepath.Match(glob, path)
if err != nil {
return err
}
if !match {
return nil
}
format := filepath.Ext(path)
if !slices.Contains(ext, format) {
return nil
}
gSrcs = append(gSrcs, &Source{
Name: info.Name(),
Location: path,
Type: SourceFile,
Format: format,
})
return nil
})
if err != nil {
return nil, err
}
return gSrcs, nil
}
for _, glob := range globs {
globSrcs, err := withGlob(glob)
if err != nil {
return nil, err
}
srcs = append(srcs, globSrcs...)
}
return srcs, nil
}
type cosmosRepo struct {
Repository
cache *expirable.LRU[uint, *Host]
}
// returns a host by id
func (r *cosmosRepo) getHost(id uint) (*Host, error) {
if host, ok := r.cache.Get(id); ok {
return host, nil
}
var h *Host
return h, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(h, id)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find host")
}
r.cache.Add(h.ID, h)
return nil
})
}
func (r *cosmosRepo) getFingerprint(id uint) (*Fingerprint, error) {
var fp *Fingerprint
return fp, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(fp, id)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find fingerprint")
}
return nil
})
}
func (r *cosmosRepo) getLabel(id uint) (*Label, error) {
var lab *Label
return lab, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(lab, id)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find label")
}
return nil
})
}
func (r *cosmosRepo) getScan(id uint) (*Scan, error) {
var sc *Scan
return sc, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(sc, id)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find scan")
}
return nil
})
}
func (r *cosmosRepo) getSource(id uint) (*Source, error) {
var sc *Source
return sc, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(sc, id)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find source")
}
return nil
})
}
func (r *cosmosRepo) getHooks(id uint) ([]*Hook, error) {
var h []*Hook
return h, r.WithTransaction(func(d *gorm.DB) error {
q := d.Find(&h, Hook{ObjectID: id})
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find labels")
}
return nil
})
}
func (r *cosmosRepo) addHost(h ...*Host) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Clauses(clause.OnConflict{
DoNothing: true,
}).Create(&h)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create host(s)")
}
for _, host := range h {
r.cache.Add(host.ID, host)
}
return nil
})
}
func (r *cosmosRepo) addFingerprint(f ...*Fingerprint) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Create(&f)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create fingerprint(s)")
}
return nil
})
}
func (r *cosmosRepo) addLabel(l ...*Label) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Create(&l)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create label(s)")
}
// Expire the hosts linked to these labels
for _, lab := range l {
r.cache.Remove(lab.HostID)
}
return nil
})
}
func (r *cosmosRepo) addScan(s ...*Scan) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Create(&s)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create scan(s)")
}
return nil
})
}
func (r *cosmosRepo) addSource(s ...*Source) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Create(&s)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create source(s)")
}
return nil
})
}
func (r *cosmosRepo) find(m, q any, args ...any) error {
return r.WithTransaction(func(d *gorm.DB) error {
res := d.Where(q, args...).Find(m)
if err := res.Error; err != nil {
return err
}
return nil
})
}
func (r *cosmosRepo) query(m any) ([]*Host, error) {
var hosts []*Host
return hosts, r.WithTransaction(func(d *gorm.DB) error {
res := d.Where(m).Find(hosts)
if err := res.Error; err != nil {
return err
}
return nil
})
}
type signatureRepo struct {
Repository
parser Parser
conf Settings
}
func (r *signatureRepo) addSignature(s ...*Signature) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.
Omit(clause.Associations).
Clauses(clause.OnConflict{
DoNothing: true,
}).
Create(&s)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create signature(s)")
}
return nil
})
}
func (r *signatureRepo) addModule(m ...*Module) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Clauses(clause.OnConflict{
DoNothing: true,
}).Create(&m)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create module(s)")
}
return nil
})
}
func (r *signatureRepo) getSignature(u uint) (*Signature, error) {
var res *Signature
return res, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(res, u)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find fingerprint")
}
return nil
})
}
func (r *signatureRepo) getModule(u uint) (*Module, error) {
var res *Module
return res, r.WithTransaction(func(d *gorm.DB) error {
q := d.First(res, u)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find module")
}
return nil
})
}
func (r *signatureRepo) remove(m any, q any) error {
return r.WithTransaction(func(d *gorm.DB) error {
q := d.Delete(m, q)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to remove fingerprints")
}
return nil
})
}
func (r *signatureRepo) deleteAll() error {
return r.WithTransaction(func(conn *gorm.DB) error {
q := conn.Session(&gorm.Session{AllowGlobalUpdate: true})
if err := q.Unscoped().Select(clause.Associations).Delete(&Signature{}, &Module{}).Error; err != nil {
return fmt.Errorf("failed to delete signatures with associations: %w", err)
}
return nil
})
}
func (r *signatureRepo) getRoots(id uint) ([]*Node, error) {
var roots []*Node
return roots, r.WithTransaction(func(conn *gorm.DB) error {
q := conn.Raw(`
SELECT *
FROM nodes AS n
WHERE n.signature_id = ?
AND NOT EXISTS (
SELECT 1
FROM node_children AS nc
JOIN nodes AS parent ON nc.node_id = parent.id
WHERE nc.child_id = n.id
AND parent.signature_id = n.signature_id
)
`, id).Scan(&roots)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to find signature roots")
}
return nil
})
}
func (r *signatureRepo) find(m, q any, args ...any) error {
return r.WithTransaction(func(d *gorm.DB) error {
res := d.Where(q, args...).Find(m)
if err := res.Error; err != nil {
return err
}
return nil
})
}
func (r *signatureRepo) parseSignatureFile(fpath string) (*Signature, error) {
info, err := os.Stat(fpath)
if err != nil {
return nil, err
}
f, oErr := os.Open(fpath)
if oErr != nil {
return nil, err
}
defer f.Close()
sig, err := r.parser.Parse(info.Name(), f)
if err != nil {
return nil, err
}
return sig, nil
}
type fileInfo struct {
Path string
Info os.FileInfo
}
func (r *signatureRepo) findFiles(t string, globs []string) ([]fileInfo, error) {
g := make([]string, len(globs))
copy(g, globs)
var (
fs afero.Fs = r.conf.RootFs()
dir string = "."
)
switch t {
case "signature":
dir = r.conf.Signatures()
for i, gl := range g {
if !strings.HasSuffix(gl, ".dice") {
g[i] = gl + ".dice"
}
}
case "module":
dir = r.conf.Modules()
default:
return nil, errors.Errorf("unable to find DICE-related files of type %s", t)
}
withGlob := func(glob string) ([]fileInfo, error) {
var files []fileInfo
if !strings.HasPrefix(glob, dir) {
glob = path.Join(dir, glob)
}
// The fs is jailed, so start from the base
err := afero.Walk(fs, dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
match, err := filepath.Match(glob, path)
if err != nil || !match || info.IsDir() {
return err
}
files = append(files, fileInfo{path, info})
return nil
})
if err != nil {
return nil, err
}
return files, nil
}
var files []fileInfo
for _, glob := range g {
globF, err := withGlob(glob)
if err != nil {
return nil, err
}
files = append(files, globF...)
}
return files, nil
}
type projectRepo struct {
Repository
}
// Add a new project to the database and initialize it
func (r *projectRepo) addProject(proj ...*Project) (err error) {
return r.WithTransaction(func(conn *gorm.DB) error {
q := conn.Create(proj)
if err := q.Error; err != nil {
return errors.Wrap(err, "failed to create project(s)")
}
return nil
})
}
func (r *projectRepo) addStudy(s ...*Study) (err error) {
panic("not implemented yet")
}
func (r *projectRepo) find(m, q any, args ...any) error {
return r.WithTransaction(func(d *gorm.DB) error {
res := d.Where(q, args...).Find(m)
if err := res.Error; err != nil {
return err
}
return nil
})
}
type repositoryBuilder struct {
dbs string
location string
config *gorm.Config
models []any
}
// Creates a repository builder.
// The home string indicates where databases are located
// The workspace indicates where files will be created
func newRepositoryBuilder(dbs string) *repositoryBuilder {
return &repositoryBuilder{
dbs: dbs,
config: &gorm.Config{
SkipDefaultTransaction: true,
PrepareStmt: true,
},
}
}
func (b *repositoryBuilder) setLocation(fpath string) *repositoryBuilder {
b.location = fpath
return b
}
func (b *repositoryBuilder) setName(n string) *repositoryBuilder {
if b.dbs == "-" {
n = "-"
}
switch n {
case "-", "":
return b.setLocation(string(INMEMORY_DATABASE))
default:
return b.setLocation(path.Join(b.dbs, n))
}
}
func (b *repositoryBuilder) setModels(m []any) *repositoryBuilder {
b.models = m
return b
}
func (b *repositoryBuilder) reset() {
b.models = nil
b.location = ""
}
func (b *repositoryBuilder) build() *repository {
repo := &repository{
config: b.config,
location: b.location,
models: b.models,
}
defer b.reset()
return repo
}
type repositoryRegistry struct {
conf Settings
builder *repositoryBuilder
signatures *signatureRepo
projects *projectRepo
cosmos *cosmosRepo
sources *sourceRepo
}
func newRepositoryFactory(conf Settings) *repositoryRegistry {
return &repositoryRegistry{
conf: conf,
builder: newRepositoryBuilder(conf.Databases()),
}
}
func (r *repositoryRegistry) Signatures() *signatureRepo {
if r.signatures != nil {
return r.signatures
}
models := []any{&Signature{}, &Module{}, &Node{}}
repo := r.builder.setModels(models).setName("signatures.db").build()
r.signatures = &signatureRepo{
repo,
NewParser(),
r.conf,
}
return r.signatures
}
func (r *repositoryRegistry) Projects() *projectRepo {
if r.projects != nil {
return r.projects
}
repo := r.builder.setModels([]any{&Project{}}).setName("projects.db").build()
r.projects = &projectRepo{repo}
return r.projects
}
func (r *repositoryRegistry) Cosmos() *cosmosRepo {
if r.cosmos != nil {
return r.cosmos
}
b := newRepositoryBuilder(r.conf.Workspace())
repo := b.
setModels([]any{&Host{}, &Fingerprint{}, &Label{}, &Hook{}}).
setName("cosmos.db").
build()
cache := expirable.NewLRU[uint, *Host](1e3, nil, 5*time.Minute)
r.cosmos = &cosmosRepo{repo, cache}
return r.cosmos
}
func (r *repositoryRegistry) Sources() *sourceRepo {
// Sources goes into memory
b := newRepositoryBuilder("-")
repo := b.setModels([]any{&Source{}}).build()
r.sources = &sourceRepo{Repository: repo}
return r.sources
}