Add end_location to json formatter

spec/ameba/formatter/json_formatter_spec.cr

@@ -54,6 +54,19 @@ module Ameba
         location["line"].should eq 1
         location["column"].should eq 2
       end
+
+      it "shows issue end_location" do
+        s = Source.new ""
+        s.add_issue DummyRule.new,
+                    Crystal::Location.new("path", 3, 3),
+                    Crystal::Location.new("path", 5, 4),
+                    "message"
+
+        result = get_result [s]
+        end_location = result["sources"][0]["issues"][0]["end_location"]
+        end_location["line"].should eq 5
+        end_location["column"].should eq 4
+      end
     end
 
     context "summary" do

src/ameba/formatter/json_formatter.cr

@@ -19,6 +19,10 @@ module Ameba::Formatter
   #             "column": 7,
   #             "line":   17,
   #           },
+  #           "end_location": {
+  #             "column": 20,
+  #             "line":   17,
+  #           },
   #           "message":   "Useless assignment to variable `a`",
   #           "rule_name": "UselessAssign",
   #         },
@@ -27,6 +31,10 @@ module Ameba::Formatter
   #             "column": 7,
   #             "line":   18,
   #           },
+  #           "end_location": {
+  #             "column": 8,
+  #             "line":   18,
+  #           },
   #           "message":   "Useless assignment to variable `a`",
   #           "rule_name": "UselessAssign",
   #         },
@@ -35,6 +43,10 @@ module Ameba::Formatter
   #             "column": 7,
   #             "line":   19,
   #           },
+  #           "location": {
+  #             "column": 9,
+  #             "line":   19,
+  #           },
   #           "message":   "Useless assignment to variable `a`",
   #           "rule_name": "UselessAssign",
   #         },
@@ -63,7 +75,7 @@ module Ameba::Formatter
 
       source.issues.each do |e|
         next if e.disabled?
-        json_source.issues << AsJSON::Issue.new(e.rule.name, e.location, e.message)
+        json_source.issues << AsJSON::Issue.new(e.rule.name, e.location, e.end_location, e.message)
         @result.summary.issues_count += 1
       end
 
@@ -96,6 +108,7 @@ module Ameba::Formatter
     record Issue,
       rule_name : String,
       location : Crystal::Location?,
+      end_location : Crystal::Location?,
       message : String do
       def to_json(json)
         json.object do
@@ -103,6 +116,8 @@ module Ameba::Formatter
           json.field :message, message
           json.field :location,
             {line: location.try &.line_number, column: location.try &.column_number}
+          json.field :end_location,
+            {line: end_location.try &.line_number, column: end_location.try &.column_number}
         end
       end
     end