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package core
import (
"fmt"
"reflect"
"regexp"
"strings"
"github.com/MichaelMure/git-bug/cache"
"github.com/MichaelMure/git-bug/repository"
"github.com/pkg/errors"
)
var ErrImportNorSupported = errors.New("import is not supported")
var ErrExportNorSupported = errors.New("export is not supported")
var bridgeImpl map[string]reflect.Type
// Bridge is a wrapper around a BridgeImpl that will bind low-level
// implementation with utility code to provide high-level functions.
type Bridge struct {
Name string
repo *cache.RepoCache
impl BridgeImpl
conf Configuration
}
// Register will register a new BridgeImpl
func Register(impl BridgeImpl) {
if bridgeImpl == nil {
bridgeImpl = make(map[string]reflect.Type)
}
bridgeImpl[impl.Target()] = reflect.TypeOf(impl)
}
// Targets return all known bridge implementation target
func Targets() []string {
var result []string
for key := range bridgeImpl {
result = append(result, key)
}
return result
}
func NewBridge(repo *cache.RepoCache, target string, name string) (*Bridge, error) {
implType, ok := bridgeImpl[target]
if !ok {
return nil, fmt.Errorf("unknown bridge target %v", target)
}
impl := reflect.New(implType).Elem().Interface().(BridgeImpl)
bridge := &Bridge{
Name: name,
repo: repo,
impl: impl,
}
return bridge, nil
}
func NewBridgeFullName(repo *cache.RepoCache, fullName string) (*Bridge, error) {
target, name, err := splitFullName(fullName)
if err != nil {
return nil, err
}
return NewBridge(repo, target, name)
}
func DefaultBridge(repo *cache.RepoCache) (*Bridge, error) {
bridges, err := ConfiguredBridges(repo)
if err != nil {
return nil, err
}
if len(bridges) == 0 {
return nil, fmt.Errorf("no configured bridge")
}
if len(bridges) > 1 {
return nil, fmt.Errorf("multiple bridge configured")
}
target, name, err := splitFullName(bridges[0])
if err != nil {
return nil, err
}
return NewBridge(repo, target, name)
}
func splitFullName(fullName string) (string, string, error) {
split := strings.Split(fullName, ".")
if len(split) != 2 {
return "", "", fmt.Errorf("bad bridge fullname: %s", fullName)
}
return split[0], split[1], nil
}
func ConfiguredBridges(repo repository.RepoCommon) ([]string, error) {
configs, err := repo.ReadConfigs("git-bug.bridge.")
if err != nil {
return nil, errors.Wrap(err, "can't read configured bridges")
}
re, err := regexp.Compile(`git-bug.bridge.([^\.]+\.[^\.]+)`)
if err != nil {
panic(err)
}
set := make(map[string]interface{})
for key := range configs {
res := re.FindStringSubmatch(key)
if res == nil {
continue
}
set[res[1]] = nil
}
result := make([]string, len(set))
i := 0
for key := range set {
result[i] = key
i++
}
return result, nil
}
func RemoveBridge(repo repository.RepoCommon, fullName string) error {
re, err := regexp.Compile(`^[^\.]+\.[^\.]+$`)
if err != nil {
panic(err)
}
if !re.MatchString(fullName) {
return fmt.Errorf("bad bridge fullname: %s", fullName)
}
keyPrefix := fmt.Sprintf("git-bug.bridge.%s", fullName)
return repo.RmConfigs(keyPrefix)
}
func (b *Bridge) Configure() error {
conf, err := b.impl.Configure(b.repo)
if err != nil {
return err
}
b.conf = conf
return b.storeConfig(conf)
}
func (b *Bridge) storeConfig(conf Configuration) error {
for key, val := range conf {
storeKey := fmt.Sprintf("git-bug.bridge.%s.%s.%s", b.impl.Target(), b.Name, key)
err := b.repo.StoreConfig(storeKey, val)
if err != nil {
return errors.Wrap(err, "error while storing bridge configuration")
}
}
return nil
}
func (b Bridge) getConfig() (Configuration, error) {
var err error
if b.conf == nil {
b.conf, err = b.loadConfig()
if err != nil {
return nil, err
}
}
return b.conf, nil
}
func (b Bridge) loadConfig() (Configuration, error) {
keyPrefix := fmt.Sprintf("git-bug.bridge.%s.%s.", b.impl.Target(), b.Name)
pairs, err := b.repo.ReadConfigs(keyPrefix)
if err != nil {
return nil, errors.Wrap(err, "error while reading bridge configuration")
}
result := make(Configuration, len(pairs))
for key, value := range pairs {
key := strings.TrimPrefix(key, keyPrefix)
result[key] = value
}
err = b.impl.ValidateConfig(result)
if err != nil {
return nil, errors.Wrap(err, "invalid configuration")
}
return result, nil
}
func (b Bridge) ImportAll() error {
importer := b.impl.Importer()
if importer == nil {
return ErrImportNorSupported
}
conf, err := b.getConfig()
if err != nil {
return err
}
return b.impl.Importer().ImportAll(b.repo, conf)
}
func (b Bridge) Import(id string) error {
importer := b.impl.Importer()
if importer == nil {
return ErrImportNorSupported
}
conf, err := b.getConfig()
if err != nil {
return err
}
return b.impl.Importer().Import(b.repo, conf, id)
}
func (b Bridge) ExportAll() error {
exporter := b.impl.Exporter()
if exporter == nil {
return ErrExportNorSupported
}
conf, err := b.getConfig()
if err != nil {
return err
}
return b.impl.Exporter().ExportAll(b.repo, conf)
}
func (b Bridge) Export(id string) error {
exporter := b.impl.Exporter()
if exporter == nil {
return ErrExportNorSupported
}
conf, err := b.getConfig()
if err != nil {
return err
}
return b.impl.Exporter().Export(b.repo, conf, id)
}
|
