fix: model import handles case where model already exists

lib/gzr/commands/model.rb

@@ -67,6 +67,8 @@ def cat(model_id)
       end
 
       desc 'import MODEL_FILE', 'Import a model configuration from a file containing json information'
+      method_option :force, type: :boolean,
+                           desc: 'Overwrite an existing connection'
       method_option :help, aliases: '-h', type: :boolean,
                            desc: 'Display usage information'
       def import(model_file)

lib/gzr/commands/model/import.rb

@@ -42,12 +42,25 @@ def execute(input: $stdin, output: $stdout)
           say_warning("options: #{@options.inspect}", output: output) if @options[:debug]
           with_session do
             read_file(@file) do |data|
-              data.select! do |k,v|
-                keys_to_keep('create_lookml_model').include? k
+              if !!cat_model(data[:name])
+                name = data[:name]
+                if !@options[:force]
+                  raise Gzr::CLI::Error, "Model #{name} already exists\nUse --force if you want to overwrite it"
+                end
+                data.select! do |k,v|
+                  keys_to_keep('update_lookml_model').include? k
+                end
+                model = update_model(data[:name],data)
+                output.puts "Updated model #{model[:name]}" unless @options[:plain]
+                output.puts model[:name] if @options[:plain]
+              else
+                data.select! do |k,v|
+                  keys_to_keep('create_lookml_model').include? k
+                end
+                model = create_model(data)
+                output.puts "Created model #{model[:name]}" unless @options[:plain]
+                output.puts model[:name] if @options[:plain]
               end
-              model = create_model(data)
-              output.puts "Created model #{model[:name]}" unless @options[:plain]
-              output.puts model[:name] if @options[:plain]
             end
           end
         end

lib/gzr/modules/model.rb

@@ -65,5 +65,15 @@ def create_model(body)
       end
     end
 
+    def update_model(model_name,body)
+      begin
+        return @sdk.update_lookml_model(model_name,body)&.to_attrs
+      rescue LookerSDK::Error => e
+        say_error "Error running update_lookml_model(#{model_name},#{JSON.pretty_generate(body)})"
+        say_error e
+        raise
+      end
+    end
+
   end
 end