0g-chain/x/auction/client/rest/query.go

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package rest
import (
"fmt"
"net/http"
"strings"
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"github.com/gorilla/mux"
"github.com/cosmos/cosmos-sdk/client/context"
sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/types/rest"
"github.com/kava-labs/kava/x/auction/types"
)
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const restAuctionID = "auction-id"
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func registerQueryRoutes(cliCtx context.CLIContext, r *mux.Router) {
r.HandleFunc(fmt.Sprintf("/%s/auctions", types.ModuleName), queryAuctionsHandlerFn(cliCtx)).Methods("GET")
r.HandleFunc(fmt.Sprintf("/%s/auctions/{%s}", types.ModuleName, restAuctionID), queryAuctionHandlerFn(cliCtx)).Methods("GET")
r.HandleFunc(fmt.Sprintf("/%s/parameters", types.ModuleName), getParamsHandlerFn(cliCtx)).Methods("GET")
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}
func queryAuctionHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
// Parse the query height
cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
if !ok {
return
}
// Prepare params for querier
vars := mux.Vars(r)
if len(vars[restAuctionID]) == 0 {
err := fmt.Errorf("%s required but not specified", restAuctionID)
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
auctionID, ok := rest.ParseUint64OrReturnBadRequest(w, vars[restAuctionID])
if !ok {
return
}
bz, err := cliCtx.Codec.MarshalJSON(types.QueryAuctionParams{AuctionID: auctionID})
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
// Query
res, height, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/%s", types.ModuleName, types.QueryGetAuction), bz)
if err != nil {
rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
return
}
// Decode and return results
cliCtx = cliCtx.WithHeight(height)
var auction types.Auction
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err = cliCtx.Codec.UnmarshalJSON(res, &auction)
if err != nil {
rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
return
}
auctionWithPhase := types.NewAuctionWithPhase(auction)
rest.PostProcessResponse(w, cliCtx, cliCtx.Codec.MustMarshalJSON(auctionWithPhase))
}
}
func queryAuctionsHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
_, page, limit, err := rest.ParseHTTPArgsWithLimit(r, 0)
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
// Parse the query height
cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
if !ok {
return
}
var auctionType string
var auctionDenom string
var auctionPhase string
if x := r.URL.Query().Get(RestType); len(x) != 0 {
auctionType = strings.ToLower(strings.TrimSpace(x))
if auctionType != types.CollateralAuctionType &&
auctionType != types.SurplusAuctionType &&
auctionType != types.DebtAuctionType {
rest.WriteErrorResponse(w, http.StatusBadRequest, fmt.Sprintf("invalid auction type %s", x))
return
}
}
if x := r.URL.Query().Get(RestDenom); len(x) != 0 {
auctionDenom = strings.TrimSpace(x)
err := sdk.ValidateDenom(auctionDenom)
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
}
if x := r.URL.Query().Get(RestPhase); len(x) != 0 {
auctionPhase = strings.ToLower(strings.TrimSpace(x))
if auctionType != types.CollateralAuctionType && len(auctionType) > 0 {
rest.WriteErrorResponse(w, http.StatusBadRequest, "cannot apply phase flag to non-collateral auction type")
return
}
if auctionPhase != types.ForwardAuctionPhase && auctionPhase != types.ReverseAuctionPhase {
rest.WriteErrorResponse(w, http.StatusBadRequest, fmt.Sprintf("invalid auction phase %s", x))
return
}
}
params := types.NewQueryAllAuctionParams(page, limit, auctionType, auctionDenom, auctionPhase)
bz, err := cliCtx.Codec.MarshalJSON(params)
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
route := fmt.Sprintf("custom/%s/%s", types.ModuleName, types.QueryGetAuctions)
res, height, err := cliCtx.QueryWithData(route, bz)
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if err != nil {
rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
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return
}
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cliCtx = cliCtx.WithHeight(height)
// Unmarshal to Auction and remarshal as AuctionWithPhase
var auctions types.Auctions
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err = cliCtx.Codec.UnmarshalJSON(res, &auctions)
if err != nil {
rest.WriteErrorResponse(w, http.StatusNotFound, err.Error())
return
}
auctionsWithPhase := []types.AuctionWithPhase{} // using empty slice so json returns [] instead of null when there's no auctions
for _, a := range auctions {
auctionsWithPhase = append(auctionsWithPhase, types.NewAuctionWithPhase(a))
}
rest.PostProcessResponse(w, cliCtx, cliCtx.Codec.MustMarshalJSON(auctionsWithPhase))
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}
}
func getParamsHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Parse the query height
cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
if !ok {
return
}
// Get the params
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res, height, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/%s", types.ModuleName, types.QueryGetParams), nil)
if err != nil {
rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
return
}
// Decode and return results
cliCtx = cliCtx.WithHeight(height)
rest.PostProcessResponse(w, cliCtx, res)
}
}