Bug 231 (#312)

* Update filter.go

* Upsert filter options

Insert or update filter options.

* Indent.

* Updated CHANGELOG.md

fix for: Option -ac overwriting other existing filters #231

CHANGELOG.md

@@ -11,6 +11,7 @@
     - Pre-flight errors are now displayed also after the usage text to prevent the need to scroll through backlog.
     - Cancelling via SIGINT (Ctrl-C) is now more responsive
     - Fixed issue where a thread would hang due to TCP errors
+    - Fixed the issue where the option -ac was overwriting existing filters. Now auto-calibration will add them where needed.
     - The `-w` flag now accepts comma delimited values in the form of `file1:W1,file2:W2`.
 
 - v1.1.0

pkg/filter/filter.go

@@ -30,11 +30,21 @@ func NewFilterByName(name string, value string) (ffuf.FilterProvider, error) {
 
 //AddFilter adds a new filter to Config
 func AddFilter(conf *ffuf.Config, name string, option string) error {
-	newf, err := NewFilterByName(name, option)
+        newf, err := NewFilterByName(name, option)
-	if err == nil {
+        if err == nil {
-		conf.Filters[name] = newf
+                // valid filter create or append
-	}
+                if conf.Filters[name] == nil {
-	return err
+                        conf.Filters[name] = newf
+                } else {
+                        currentfilter := conf.Filters[name].Repr()
+                        newoption := strings.TrimSpace(strings.Split(currentfilter, ":")[1]) + "," + option
+                        newerf, err := NewFilterByName(name, newoption)
+                        if err == nil {
+                                conf.Filters[name] = newerf
+                        }
+                }
+        }
+        return err
 }
 
 //AddMatcher adds a new matcher to Config