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ledger.go
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ledger.go
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package actions
import (
"net/http"
"github.com/xdbfoundation/go/protocols/frontier"
"github.com/xdbfoundation/go/services/frontier/internal/context"
"github.com/xdbfoundation/go/services/frontier/internal/db2/history"
"github.com/xdbfoundation/go/services/frontier/internal/ledger"
"github.com/xdbfoundation/go/services/frontier/internal/render/problem"
"github.com/xdbfoundation/go/services/frontier/internal/resourceadapter"
"github.com/xdbfoundation/go/support/render/hal"
)
type GetLedgersHandler struct {
LedgerState *ledger.State
}
func (handler GetLedgersHandler) GetResourcePage(w HeaderWriter, r *http.Request) ([]hal.Pageable, error) {
pq, err := GetPageQuery(handler.LedgerState, r)
if err != nil {
return nil, err
}
err = validateCursorWithinHistory(handler.LedgerState, pq)
if err != nil {
return nil, err
}
historyQ, err := context.HistoryQFromRequest(r)
if err != nil {
return nil, err
}
var records []history.Ledger
if err = historyQ.Ledgers().Page(pq).Select(r.Context(), &records); err != nil {
return nil, err
}
var result []hal.Pageable
for _, record := range records {
var ledger frontier.Ledger
resourceadapter.PopulateLedger(r.Context(), &ledger, record)
if err != nil {
return nil, err
}
result = append(result, ledger)
}
return result, nil
}
// LedgerByIDQuery query struct for the ledger/{id} endpoint
type LedgerByIDQuery struct {
LedgerID uint32 `schema:"ledger_id" valid:"-"`
}
type GetLedgerByIDHandler struct {
LedgerState *ledger.State
}
func (handler GetLedgerByIDHandler) GetResource(w HeaderWriter, r *http.Request) (interface{}, error) {
qp := LedgerByIDQuery{}
err := getParams(&qp, r)
if err != nil {
return nil, err
}
if int32(qp.LedgerID) < handler.LedgerState.CurrentStatus().HistoryElder {
return nil, problem.BeforeHistory
}
historyQ, err := context.HistoryQFromRequest(r)
if err != nil {
return nil, err
}
var ledger history.Ledger
err = historyQ.LedgerBySequence(r.Context(), &ledger, int32(qp.LedgerID))
if err != nil {
return nil, err
}
var result frontier.Ledger
resourceadapter.PopulateLedger(r.Context(), &result, ledger)
return result, nil
}