api, frontend, db: add comment sorting

Closes https://gitlab.com/commento/commento/issues/215

api/comment_list.go

@@ -191,6 +191,7 @@ func commentListHandler(w http.ResponseWriter, r *http.Request) {
 		"requireIdentification": d.RequireIdentification,
 		"isFrozen":              d.State == "frozen",
 		"isModerator":           isModerator,
+		"defaultSortPolicy":     d.DefaultSortPolicy,
 		"attributes":            p,
 		"configuredOauths": map[string]bool{
 			"commento": d.CommentoProvider,

api/domain.go

@@ -25,4 +25,5 @@ type domain struct {
 	SsoProvider             bool        `json:"ssoProvider"`
 	SsoSecret               string      `json:"ssoSecret"`
 	SsoUrl                  string      `json:"ssoUrl"`
+	DefaultSortPolicy       string      `json:"defaultSortPolicy"`
 }

api/domain_get.go

@@ -27,7 +27,8 @@ func domainGet(dmn string) (domain, error) {
 			gitlabProvider,
 			ssoProvider,
 			ssoSecret,
-			ssoUrl
+			ssoUrl,
+			defaultSortPolicy
 		FROM domains
 		WHERE domain = $1;
 	`
@@ -54,7 +55,8 @@ func domainGet(dmn string) (domain, error) {
 		&d.GitlabProvider,
 		&d.SsoProvider,
 		&d.SsoSecret,
-		&d.SsoUrl); err != nil {
+		&d.SsoUrl,
+		&d.DefaultSortPolicy); err != nil {
 		return d, errorNoSuchDomain
 	}
 

api/domain_list.go

@@ -29,7 +29,8 @@ func domainList(ownerHex string) ([]domain, error) {
 			gitlabProvider,
 			ssoProvider,
 			ssoSecret,
-			ssoUrl
+			ssoUrl,
+			defaultSortPolicy
 		FROM domains
 		WHERE ownerHex=$1;
 	`
@@ -62,7 +63,8 @@ func domainList(ownerHex string) ([]domain, error) {
 			&d.GitlabProvider,
 			&d.SsoProvider,
 			&d.SsoSecret,
-			&d.SsoUrl); err != nil {
+			&d.SsoUrl,
+			&d.DefaultSortPolicy); err != nil {
 			logger.Errorf("cannot Scan domain: %v", err)
 			return nil, errorInternal
 		}

api/domain_update.go

@@ -25,7 +25,8 @@ func domainUpdate(d domain) error {
 			githubProvider=$12,
 			gitlabProvider=$13,
 			ssoProvider=$14,
-			ssoUrl=$15
+			ssoUrl=$15,
+			defaultSortPolicy=$16
 		WHERE domain=$1;
 	`
 
@@ -44,7 +45,8 @@ func domainUpdate(d domain) error {
 		d.GithubProvider,
 		d.GitlabProvider,
 		d.SsoProvider,
-		d.SsoUrl)
+		d.SsoUrl,
+		d.DefaultSortPolicy)
 	if err != nil {
 		logger.Errorf("cannot update non-moderators: %v", err)
 		return errorInternal