Working on error handling

openid-connect-server/src/main/java/org/mitre/oauth2/web/ScopeAPI.java

@@ -18,6 +18,7 @@ import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 
 import com.google.gson.Gson;
 
@@ -103,6 +104,23 @@ public class ScopeAPI {
 		}
 	}
 	
+	@PreAuthorize("hasRole('ROLE_ADMIN')")
+	@RequestMapping(value="/checkScopeValue", method = RequestMethod.GET)
+	public String checkScopeValue(@RequestParam String value, ModelMap m) {
+		
+		SystemScope alreadyExists = scopeService.getByValue(value);
+		if (alreadyExists != null) {
+			m.put("code", HttpStatus.CONFLICT);
+			m.put("entity", "A scope with value " + value + " already exists, please choose a different value.");
+		}
+		else {
+			m.put("code", HttpStatus.ACCEPTED);
+			m.put("entity", "OK");
+		}
+		
+		return "jsonEntityView";
+	}
+	
 	@PreAuthorize("hasRole('ROLE_ADMIN')")
 	@RequestMapping(value = "", method = RequestMethod.POST, produces = "application/json", consumes = "application/json")
 	public String createScope(@RequestBody String json, ModelMap m) {
@@ -113,7 +131,7 @@ public class ScopeAPI {
 			//Error, cannot save a scope with the same value as an existing one
 			logger.error("Error: attempting to save a scope with a value that already exists: " + scope.getValue());
 			m.put("code", HttpStatus.CONFLICT);
-			m.put("entity", "A scope with value " + scope.getValue() + "already exists, please choose a different value.");
+			m.put("entity", "A scope with value " + scope.getValue() + " already exists, please choose a different value.");
 			return "jsonEntityView";
 		}
 		

openid-connect-server/src/main/webapp/resources/js/scope.js

@@ -207,6 +207,20 @@ var SystemScopeFormView = Backbone.View.extend({
 			return false;
 		}
 		
+		var valuedata = {};
+		valuedata.value = value;
+		var alreadyExists = false;
+		
+		$.get(this.model.urlRoot + "/checkScopeValue", valuedata)
+			.success(function() {
+				console.log("scope value is OK");
+			})
+			.error(function(error, response) {
+				$('#value input').addClass('error');
+				//add hint
+				alreadyExists = true;
+			});
+		
 		var valid = this.model.set({
 			value:value,
 			description:$('#description textarea').val(),
@@ -215,7 +229,8 @@ var SystemScopeFormView = Backbone.View.extend({
 			allowDynReg:$('#allowDynReg input').is(':checked')
 		});
 		
-		if (valid) {
+		if (valid && !alreadyExists) {
+			
 			var _self = this;
 			this.model.save({}, {
 				success:function() {