renamed Priority to Score in MessageAliases

Author: CodeShellDev

.github/templates/README.template.md

@@ -230,28 +230,29 @@ example:
 
 To improve compatibility with other services Secured Signal API provides aliases for the `message` attribute by default:
 
-| Alias       | Priority |
-| ----------- | -------- |
-| msg         | 100      |
-| content     | 99       |
-| description | 98       |
-| text        | 20       |
-| body        | 15       |
-| summary     | 10       |
-| details     | 9        |
-| payload     | 2        |
-| data        | 1        |
-
-Secured Signal API will use the highest priority Message Alias to extract the correct message from the Request Body.
-
-Message Aliases can be added by setting `MESSAGE_ALIASES`:
+| Alias       | Score |
+| ----------- | ----- |
+| msg         | 100   |
+| content     | 99    |
+| description | 98    |
+| text        | 20    |
+| body        | 15    |
+| summary     | 10    |
+| details     | 9     |
+| payload     | 2     |
+| data        | 1     |
+
+Secured Signal API will pick the best scoring Message Alias (if available) to extract the correct message from the Request Body.
+
+Message Aliases can be added by setting `MESSAGE_ALIASES` to a valid json array containing dictionaries of `alias`, the json key to be used for lookup (use `.` dots for using values from a nested dictionary and `[i]` to get values from an array):
 
 ```yaml
 environment:
   MESSAGE_ALIASES: |
     [
-      { "alias": "note", "priority": 4 }, 
-      { "alias": "test", "priority": 3 }
+      { "alias": "msg", "score": 80 }, 
+      { "alias": "data.message", "score": 79 },
+      { "alias": "array[0].message", "score": 78 },
     ]
 ```
 

internals/proxy/middlewares/body.go

@@ -6,13 +6,14 @@ import (
 	"net/http"
 	"strconv"
 
+	"github.com/codeshelldev/secured-signal-api/utils"
 	log "github.com/codeshelldev/secured-signal-api/utils/logger"
 	request "github.com/codeshelldev/secured-signal-api/utils/request"
 )
 
 type MessageAlias struct {
 	Alias    string
-	Priority int
+	Score 	 int
 }
 
 type BodyMiddleware struct {
@@ -74,17 +75,28 @@ func getMessage(aliases []MessageAlias, data map[string]interface{}) (string, ma
 	var best int
 
 	for _, alias := range aliases {
-		aliasKey := alias.Alias
-		priority := alias.Priority
+		aliasValue, score, ok := processAlias(alias, data)
 
-		value, ok := data[aliasKey]
-
-		if ok && value != "" && priority > best {
-			content = data[aliasKey].(string)
+		if ok && score > best {
+			content = aliasValue
 		}
 
-		data[aliasKey] = nil
+		data[alias.Alias] = nil
 	}
 
 	return content, data
+}
+
+func processAlias(alias MessageAlias, data map[string]interface{}) (string, int, bool) {
+	aliasKey := alias.Alias
+
+	value, ok := utils.GetJsonByPath(aliasKey, data)
+
+	aliasValue, isStr := value.(string)
+
+	if isStr && ok && aliasValue != "" {
+		return aliasValue, alias.Score, true
+	} else {
+		return "", 0, false
+	}
 }