add json matcher to log matcher (#103)

Author: snowp

src/bitdrift_public/protobuf/matcher/v1/log_matcher.proto

@@ -41,6 +41,7 @@ message LogMatcher {
         value_matcher.v1.SemVerValueMatch sem_ver_value_match = 4;
         value_matcher.v1.IsSetMatch is_set_match = 5;
         value_matcher.v1.DoubleValueMatch double_value_match = 6;
+        value_matcher.v1.JsonPathValueMatch json_value_match = 7;
       }
     }
 

src/bitdrift_public/protobuf/value_matcher/v1/value_matcher.proto

@@ -62,5 +62,22 @@ message SemVerValueMatch {
   string match_value = 2 [(validate.rules).string = {min_len: 1}];
 }
 
+message JsonPathValueMatch {
+  Operator operator = 1 [(validate.rules).enum.defined_only = true];
+  message JsonPath {
+    message KeyOrIndex {
+      oneof key_or_index {
+        option (validate.required) = true;
+
+        string key = 1 [(validate.rules).string = {min_len: 1}];
+        int32 index = 2;
+      }
+    }
+
+    string path = 1 [(validate.rules).string = {min_len: 1}];
+  }
+  string match_value = 2 [(validate.rules).string = {min_len: 1}];
+}
+
 // Matcher to evaluate whether a value is set.
 message IsSetMatch {}