feat: add target deletion functionality with cascaded removal of associated jobs and tasks

internal/db/targets_loader.go

@@ -49,3 +49,44 @@ func (db *DB) LoadTargetsFromYAML(filepath string) error {
 	}
 	return nil
 }
+
+// RemoveTargetFromYAML removes a target from the target configuration YAML file if it exists
+func RemoveTargetFromYAML(filepath string, targetURL string) error {
+	if filepath == "" {
+		return nil
+	}
+	data, err := os.ReadFile(filepath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return fmt.Errorf("could not read target config: %w", err)
+	}
+
+	var config targetConfig
+	if err := yaml.Unmarshal(data, &config); err != nil {
+		return fmt.Errorf("could not parse target config: %w", err)
+	}
+
+	var newTargets []struct {
+		Name      string `yaml:"name"`
+		TargetURL string `yaml:"target_url"`
+		Platform  string `yaml:"platform"`
+		IsActive  bool   `yaml:"is_active"`
+	}
+
+	for _, t := range config.Targets {
+		if t.TargetURL != targetURL {
+			newTargets = append(newTargets, t)
+		}
+	}
+
+	config.Targets = newTargets
+	outData, err := yaml.Marshal(&config)
+	if err != nil {
+		return fmt.Errorf("could not marshal target config: %w", err)
+	}
+
+	return os.WriteFile(filepath, outData, 0644)
+}
+