mesg-foundation/core

package rest

import (
    "fmt"
    "io/ioutil"
    "net/http"

    "github.com/cosmos/cosmos-sdk/client/context"
    "github.com/cosmos/cosmos-sdk/types/rest"
    "github.com/gorilla/mux"
    "github.com/mesg-foundation/engine/hash"
    "github.com/mesg-foundation/engine/process"
    "github.com/mesg-foundation/engine/x/process/internal/types"
)

func registerQueryRoutes(cliCtx context.CLIContext, r *mux.Router) {
    r.HandleFunc(
        "/process/get/{hash}",
        queryGetHandlerFn(cliCtx),
    ).Methods(http.MethodGet)

    r.HandleFunc(
        "/process/list",
        queryListHandlerFn(cliCtx),
    ).Methods(http.MethodGet)

    r.HandleFunc(
        "/process/hash",
        queryHashHandlerFn(cliCtx),
    ).Methods(http.MethodPost)

    r.HandleFunc(
        "/process/exist/{hash}",
        queryExistHandlerFn(cliCtx),
    ).Methods(http.MethodGet)
}

func queryGetHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
    return func(w http.ResponseWriter, r *http.Request) {
        vars := mux.Vars(r)

        cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
        if !ok {
            return
        }

        route := fmt.Sprintf("custom/%s/%s/%s", types.QuerierRoute, types.QueryGet, vars["hash"])

        res, height, err := cliCtx.QueryWithData(route, nil)
        if err != nil {
            rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
            return
        }

        cliCtx = cliCtx.WithHeight(height)
        rest.PostProcessResponse(w, cliCtx, res)
    }
}

func queryListHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
    return func(w http.ResponseWriter, r *http.Request) {
        cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
        if !ok {
            return
        }

        route := fmt.Sprintf("custom/%s/%s", types.QuerierRoute, types.QueryList)

        res, height, err := cliCtx.QueryWithData(route, nil)
        if err != nil {
            rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
            return
        }

        cliCtx = cliCtx.WithHeight(height)
        rest.PostProcessResponse(w, cliCtx, res)
    }
}

// HashRequest is the request of the hash endpoint.
type HashRequest struct {
    Name  string                  `json:"name,omitempty"`
    Nodes []*process.Process_Node `json:"nodes,omitempty"`
    Edges []*process.Process_Edge `json:"edges,omitempty"`
}

func queryHashHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
    return func(w http.ResponseWriter, r *http.Request) {
        cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
        if !ok {
            return
        }

        data, err := ioutil.ReadAll(r.Body)
        if err != nil {
            rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
            return
        }

        var req HashRequest
        if err := cliCtx.Codec.UnmarshalJSON(data, &req); err != nil {
            rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
            return
        }

        p := &process.Process{
            Name:  req.Name,
            Nodes: req.Nodes,
            Edges: req.Edges,
        }
        rest.PostProcessResponse(w, cliCtx, hash.Dump(p).String())
    }
}

func queryExistHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
    return func(w http.ResponseWriter, r *http.Request) {
        vars := mux.Vars(r)

        cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
        if !ok {
            return
        }

        route := fmt.Sprintf("custom/%s/%s/%s", types.QuerierRoute, types.QueryExist, vars["hash"])

        res, height, err := cliCtx.QueryWithData(route, nil)
        if err != nil {
            rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
            return
        }

        cliCtx = cliCtx.WithHeight(height)
        rest.PostProcessResponse(w, cliCtx, res)
    }
}