Refactor HAL template generation in root endpoint

services/horizon/internal/actions/account.go

@@ -77,7 +77,7 @@ type AccountsQuery struct {
 
 // URITemplate returns a rfc6570 URI template the query struct
 func (q AccountsQuery) URITemplate() string {
-	return "/accounts{?" + strings.Join(getURIParams(&q, true), ",") + "}"
+	return getURITemplate(&q, "accounts", true)
 }
 
 var invalidAccountsParams = problem.P{

services/horizon/internal/actions/claimable_balance.go

@@ -100,7 +100,7 @@ func (q ClaimableBalancesQuery) claimant() *xdr.AccountId {
 
 // URITemplate returns a rfc6570 URI template the query struct
 func (q ClaimableBalancesQuery) URITemplate() string {
-	return "/claimable_balances?{asset,claimant,sponsor}"
+	return getURITemplate(&q, "claimable_balances", true)
 }
 
 type GetClaimableBalancesHandler struct {

services/horizon/internal/actions/claimable_balance_test.go

@@ -533,7 +533,7 @@ func TestCursorAndOrderValidation(t *testing.T) {
 
 func TestClaimableBalancesQueryURLTemplate(t *testing.T) {
 	tt := assert.New(t)
-	expected := "/claimable_balances?{asset,claimant,sponsor}"
+	expected := "/claimable_balances{?asset,sponsor,claimant,cursor,limit,order}"
 	q := ClaimableBalancesQuery{}
 	tt.Equal(expected, q.URITemplate())
 }

services/horizon/internal/actions/helpers.go

@@ -440,15 +440,19 @@ func getURIParams(query interface{}, paginated bool) []string {
 	params := getSchemaTags(reflect.ValueOf(query).Elem())
 	if paginated {
 		pagingParams := []string{
-			"cursor",
-			"limit",
-			"order",
+			ParamCursor,
+			ParamLimit,
+			ParamOrder,
 		}
 		params = append(params, pagingParams...)
 	}
 	return params
 }
 
+func getURITemplate(query interface{}, basePath string, paginated bool) string {
+	return "/" + basePath + "{?" + strings.Join(getURIParams(query, paginated), ",") + "}"
+}
+
 func getSchemaTags(v reflect.Value) []string {
 	qt := v.Type()
 	fields := make([]string, 0, v.NumField())

services/horizon/internal/actions/liquidity_pool.go

@@ -68,7 +68,7 @@ type LiquidityPoolsQuery struct {
 
 // URITemplate returns a rfc6570 URI template the query struct
 func (q LiquidityPoolsQuery) URITemplate() string {
-	return "/liquidity_pools?{?reserves,account}"
+	return getURITemplate(&q, "liquidity_pools", true)
 }
 
 // Validate validates and parses the query

services/horizon/internal/actions/path.go

@@ -5,7 +5,6 @@ import (
 	"database/sql"
 	"fmt"
 	"net/http"
-	"strings"
 
 	"github.com/stellar/go/amount"
 	"github.com/stellar/go/protocols/horizon"
@@ -72,7 +71,7 @@ func (q StrictReceivePathsQuery) DestinationAsset() xdr.Asset {
 
 // URITemplate returns a rfc6570 URI template for the query struct
 func (q StrictReceivePathsQuery) URITemplate() string {
-	return "/paths/strict-receive{?" + strings.Join(getURIParams(&q, false), ",") + "}"
+	return getURITemplate(&q, "paths/strict-receive", false)
 }
 
 // Validate runs custom validations.
@@ -214,7 +213,7 @@ type FindFixedPathsQuery struct {
 
 // URITemplate returns a rfc6570 URI template for the query struct
 func (q FindFixedPathsQuery) URITemplate() string {
-	return "/paths/strict-send{?" + strings.Join(getURIParams(&q, false), ",") + "}"
+	return getURITemplate(&q, "paths/strict-send", false)
 }
 
 // Validate runs custom validations.