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accounts_database.go
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/
accounts_database.go
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package activitypub
import (
"context"
"fmt"
"net/url"
"sort"
"strings"
"github.com/aaronland/go-roster"
)
type GetAccountIdsCallbackFunc func(context.Context, int64) error
type GetAccountsCallbackFunc func(context.Context, *Account) error
type AccountsDatabase interface {
GetAccounts(context.Context, GetAccountsCallbackFunc) error
GetAccountIdsForDateRange(context.Context, int64, int64, GetAccountIdsCallbackFunc) error
GetAccountWithId(context.Context, int64) (*Account, error)
GetAccountWithName(context.Context, string) (*Account, error)
AddAccount(context.Context, *Account) error
RemoveAccount(context.Context, *Account) error
UpdateAccount(context.Context, *Account) error
Close(context.Context) error
}
var account_database_roster roster.Roster
// AccountsDatabaseInitializationFunc is a function defined by individual account_database package and used to create
// an instance of that account_database
type AccountsDatabaseInitializationFunc func(ctx context.Context, uri string) (AccountsDatabase, error)
// RegisterAccountsDatabase registers 'scheme' as a key pointing to 'init_func' in an internal lookup table
// used to create new `AccountsDatabase` instances by the `NewAccountsDatabase` method.
func RegisterAccountsDatabase(ctx context.Context, scheme string, init_func AccountsDatabaseInitializationFunc) error {
err := ensureAccountsDatabaseRoster()
if err != nil {
return err
}
return account_database_roster.Register(ctx, scheme, init_func)
}
func ensureAccountsDatabaseRoster() error {
if account_database_roster == nil {
r, err := roster.NewDefaultRoster()
if err != nil {
return err
}
account_database_roster = r
}
return nil
}
// NewAccountsDatabase returns a new `AccountsDatabase` instance configured by 'uri'. The value of 'uri' is parsed
// as a `url.URL` and its scheme is used as the key for a corresponding `AccountsDatabaseInitializationFunc`
// function used to instantiate the new `AccountsDatabase`. It is assumed that the scheme (and initialization
// function) have been registered by the `RegisterAccountsDatabase` method.
func NewAccountsDatabase(ctx context.Context, uri string) (AccountsDatabase, error) {
u, err := url.Parse(uri)
if err != nil {
return nil, err
}
scheme := u.Scheme
i, err := account_database_roster.Driver(ctx, scheme)
if err != nil {
return nil, err
}
init_func := i.(AccountsDatabaseInitializationFunc)
return init_func(ctx, uri)
}
// Schemes returns the list of schemes that have been registered.
func AccountsDatabaseSchemes() []string {
ctx := context.Background()
schemes := []string{}
err := ensureAccountsDatabaseRoster()
if err != nil {
return schemes
}
for _, dr := range account_database_roster.Drivers(ctx) {
scheme := fmt.Sprintf("%s://", strings.ToLower(dr))
schemes = append(schemes, scheme)
}
sort.Strings(schemes)
return schemes
}