refactor: introduce command design pattern

src/cli.cr

@@ -5,194 +5,38 @@
 
 require "option_parser"
 require "./config"
-require "./fzf"
 require "./version"
+require "./parsers/root_parser"
+require "./utils/breadcrumbs"
+require "./utils/fzf"
+require "./file_system_manager"
+require "./command_factory"
 
 module GX
   class Cli
     Log = ::Log.for("cli")
 
-    @config : Config
+    @config : GX::Config
 
-    def initialize()
+    def initialize
       # Main execution starts here
+      # # FIXME: add a method to verify that FZF is installed
       @config = Config.new
-
-      ## FIXME: check that FZF is installed
     end
 
     def parse_command_line(args)
-      # update 
-      add_args = { name: "", path: "" }
-      delete_args = { name: "" }
       pparser = OptionParser.new do |parser|
-        parser.banner = "Usage: #{PROGRAM_NAME} [options]\n\nGlobal options"
-
-        parser.on("-c", "--config FILE", "Set configuration file") do |path|
-          Log.info { "Configuration set to #{path}" }
-          @config.path = path
-        end
-
-        parser.on("-v", "--verbose", "Set more verbosity") do |flag|
-          Log.info { "Verbosity enabled" }
-          @config.verbose = true
-        end
-
-        parser.on("-o", "--open", "Automatically open directory after mount") do |flag|
-          Log.info { "Auto-open enabled" }
-          @config.auto_open = true
-        end
-
-        parser.on("--version", "Show version") do |flag|
-          @config.mode = Config::Mode::ShowVersion
-        end
-
-        parser.on("-h", "--help", "Show this help") do |flag|
-          STDOUT.puts parser
-          exit(0)
-        end
-
-        parser.separator("\nCommands")
-        parser.on("config", "Manage configuration") do 
-          parser.banner = "Usage: #{PROGRAM_NAME} config [commands] [options]\n\nGlobal options"
-          parser.separator("\nCommands")
-
-          parser.on("create", "Create vault") do 
-            @config.mode = Config::Mode::ConfigAdd
-
-            parser.banner = "Usage: #{PROGRAM_NAME} config create [commands] [options]\n\nGlobal options"
-            parser.separator("\nCommand options")
-
-            parser.on("-n", "--name", "Set vault name") do |name|
-              add_args = add_args.merge({ name: name })
-            end
-            parser.on("-p", "--path", "Set vault encrypted path") do |path|
-              add_args = add_args.merge({ path: path })
-            end
-          end
-
-          parser.on("delete", "Delete vault") do 
-            @config.mode = Config::Mode::ConfigAdd
-
-            parser.banner = "Usage: #{PROGRAM_NAME} delete [options]\n\nGlobal options"
-            parser.separator("\nCommand options")
-
-            parser.on("-n", "--name", "Set vault name") do |name|
-              delete_args = delete_args.merge({ name: name })
-            end
-          end
-
-          parser.on("edit", "Edit configuration") do |flag|
-            @config.mode = Config::Mode::ConfigEdit
-          end
-        end
-
+        breadcrumbs = Utils::BreadCrumbs.new([] of String)
+        Parsers::RootParser.new.build(parser, breadcrumbs, @config)
       end
       pparser.parse(args)
     end
 
-    def run()
-      case @config.mode 
-      when Config::Mode::ShowVersion
-        STDOUT.puts "#{PROGRAM_NAME} #{VERSION}"
-      when Config::Mode::Mount
-        @config.load_from_env
-        @config.load_from_file
-        filesystem = choose_filesystem
-        raise Models::InvalidFilesystemError.new("Invalid filesystem") if filesystem.nil?
+    def run
+      command = CommandFactory.create_command(@config, @config.mode)
+      abort("ERROR: unknown command for mode #{@config.mode}") if command.nil?
 
-        mount_or_umount(filesystem)
-        auto_open(filesystem) if filesystem.mounted? && @config.auto_open
-      end
-    end
-
-    def auto_open(filesystem)
-      # FIXME: support xdg-open
-      # FIXME: support mailcap
-      # FIXME: support user-defined command
-      # FIXME: detect graphical environment
-      
-      mount_point_safe = filesystem.mount_point
-      raise Models::InvalidMountpointError.new("Invalid filesystem") if mount_point_safe.nil?
-
-      if graphical_environment?
-        process = Process.new(
-          "xdg-open",  ## FIXME: make configurable
-          [mount_point_safe],
-          input: STDIN, 
-          output: STDOUT, 
-          error: STDERR
-        )
-        unless process.wait.success?
-          puts "Error opening filesystem".colorize(:red)
-          return
-        end
-      else
-        process = Process.new(
-          "vifm",  ## FIXME: make configurable
-          [mount_point_safe],
-          input: STDIN, 
-          output: STDOUT, 
-          error: STDERR
-        )
-        unless process.wait.success?
-          puts "Error opening filesystem".colorize(:red)
-          return
-        end
-      end
-    end
-
-    def graphical_environment?
-      if ENV["DISPLAY"]? || ENV["WAYLAND_DISPLAY"]?
-        return true
-      end
-      return false
-    end
-
-    def choose_filesystem()
-      names_display = {} of String => NamedTuple(filesystem: Models::AbstractFilesystemConfig, ansi_name: String)
-
-      config_root = @config.root
-      return if config_root.nil?
-
-      config_root.filesystems.each do |filesystem|
-        fs_str = filesystem.type.ljust(12,' ')
-
-        suffix = ""
-        suffix_ansi = ""
-        if filesystem.mounted? 
-          suffix = "[open]"
-          suffix_ansi = "[#{ "open".colorize(:green) }]"
-        end
-
-        result_name = "#{fs_str} #{filesystem.name} #{suffix}".strip
-        ansi_name = "#{fs_str.colorize(:dark_gray)} #{filesystem.name} #{suffix_ansi}".strip
-
-        names_display[result_name] = {
-          filesystem: filesystem,
-          ansi_name: ansi_name
-        }
-      end
-
-      ## FIXME: feat: allow to sort by name or by filesystem
-      sorted_values = names_display.values.sort_by { |item| item[:filesystem].name }
-      result_filesystem_name = Fzf.run(sorted_values.map(&.[:ansi_name])).strip
-      selected_filesystem = names_display[result_filesystem_name][:filesystem]
-      puts ">> #{selected_filesystem.name}".colorize(:yellow)
-
-      if !selected_filesystem
-        STDERR.puts "Vault not found: #{selected_filesystem}.".colorize(:red)
-        return
-      end
-      return selected_filesystem
-    end
-
-    def mount_or_umount(selected_filesystem)
-      if !selected_filesystem.mounted?
-        selected_filesystem.mount()
-      else
-        selected_filesystem.umount()
-      end
+      command.try &.execute
     end
   end
 end

src/command_factory.cr

@@ -0,0 +1,11 @@
+require "./commands"
+
+module GX
+  class CommandFactory
+    def self.create_command(config : GX::Config, mode : GX::Types::Mode) : Commands::AbstractCommand?
+      classes = {{ Commands::AbstractCommand.all_subclasses }}
+      command_klass = classes.find { |klass| klass.handles_mode == mode }
+      command_klass.try &.new(config)
+    end
+  end
+end

src/commands.cr

@@ -0,0 +1 @@
+require "./commands/*"

src/commands/abstract_command.cr

@@ -0,0 +1,13 @@
+require "../config"
+
+module GX::Commands
+  abstract class AbstractCommand
+    abstract def initialize(config : GX::Config)
+
+    abstract def execute
+
+    def self.mode
+      Gx::Types::Mode::None
+    end
+  end
+end

src/commands/config_init.cr

@@ -0,0 +1,15 @@
+require "./abstract_command"
+
+module GX::Commands
+  class ConfigInit < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::ConfigInit
+    end
+  end
+end

src/commands/global_completion.cr

@@ -0,0 +1,15 @@
+require "./abstract_command"
+
+module GX::Commands
+  class GlobalCompletion < AbstractCommand
+    def initialize(@config : GX::Config)
+    end
+
+    def execute
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::GlobalConfig
+    end
+  end
+end

src/commands/global_config.cr

@@ -0,0 +1,15 @@
+require "./abstract_command"
+
+module GX::Commands
+  class GlobalConfig < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::GlobalConfig
+    end
+  end
+end

src/commands/global_help.cr

@@ -0,0 +1,18 @@
+require "./abstract_command"
+
+module GX::Commands
+  class GlobalHelp < AbstractCommand
+    def initialize(@config : GX::Config) # FIXME
+    end
+
+    def execute
+      STDOUT.puts ""
+      @config.help_options.try { |opts| puts opts.parser_snapshot }
+      exit(0)
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::GlobalHelp
+    end
+  end
+end

src/commands/global_mapping.cr

@@ -0,0 +1,16 @@
+require "./abstract_command"
+
+module GX::Commands
+  class GlobalMapping < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+      # FIXME: implement
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::GlobalMapping
+    end
+  end
+end

src/commands/global_tui.cr

@@ -0,0 +1,25 @@
+require "./abstract_command"
+require "../file_system_manager"
+
+module GX::Commands
+  class GlobalTui < AbstractCommand
+    @file_system_manager : FileSystemManager
+
+    def initialize(@config : GX::Config)
+      @config.load_from_env
+      @config.load_from_file
+      @file_system_manager = FileSystemManager.new(@config)
+    end
+
+    def execute
+      filesystem = @file_system_manager.choose_filesystem
+      raise Models::InvalidFilesystemError.new("Invalid filesystem") if filesystem.nil?
+      @file_system_manager.mount_or_umount(filesystem)
+      @file_system_manager.auto_open(filesystem) if filesystem.mounted? && @config.auto_open
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::GlobalTui
+    end
+  end
+end

src/commands/global_version.cr

@@ -0,0 +1,17 @@
+require "./abstract_command"
+require "../config"
+
+module GX::Commands
+  class GlobalVersion < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+      STDOUT.puts "#{File.basename PROGRAM_NAME} #{VERSION}"
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::GlobalVersion
+    end
+  end
+end

src/commands/mapping_create.cr

@@ -0,0 +1,16 @@
+require "./abstract_command"
+
+module GX::Commands
+  class MappingCreate < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+      # FIXME: implement
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::MappingCreate
+    end
+  end
+end

src/commands/mapping_delete.cr

@@ -0,0 +1,16 @@
+require "./abstract_command"
+
+module GX::Commands
+  class MappingDelete < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+      # FIXME: implement
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::MappingDelete
+    end
+  end
+end

src/commands/mapping_edit.cr

@@ -0,0 +1,16 @@
+require "./abstract_command"
+
+module GX::Commands
+  class MappingEdit < AbstractCommand
+    def initialize(config : GX::Config) # FIXME
+    end
+
+    def execute
+      # FIXME: implement
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::MappingEdit
+    end
+  end
+end

src/commands/mapping_list.cr

@@ -0,0 +1,45 @@
+require "./abstract_command"
+require "../file_system_manager"
+require "tablo"
+
+module GX::Commands
+  class MappingList < AbstractCommand
+    def initialize(@config : GX::Config)
+      @config.load_from_env
+      @config.load_from_file
+      @file_system_manager = FileSystemManager.new(@config)
+    end
+
+    def execute
+      filesystems = @config.root.try &.filesystems
+      return if filesystems.nil?
+      # pp filesystems
+
+      fsdata = [] of Array(String)
+      filesystems.each do |item|
+        fsdata << [
+          item.type,
+          item.name,
+          item.mounted?.to_s,
+        ]
+      end
+      # pp fsdata
+
+      report = Tablo::Table.new(
+        fsdata,
+        # connectors: Tablo::CONNECTORS_SINGLE_ROUNDED
+        column_padding: 0,
+        style: "" # Tablo::STYLE_NO_MID_COL
+) do |table|
+        table.add_column("TYPE") { |row| row[0] }
+        table.add_column("NAME", width: 40) { |row| row[1] }
+        table.add_column("MOUNTED") { |row| row[2] }
+      end
+      puts report
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::MappingList
+    end
+  end
+end

src/commands/mapping_mount.cr

@@ -0,0 +1,26 @@
+require "./abstract_command"
+require "../file_system_manager"
+
+module GX::Commands
+  class MappingMount < AbstractCommand
+    @file_system_manager : FileSystemManager
+
+    def initialize(@config : GX::Config) # FIXME
+      @config.load_from_env
+      @config.load_from_file
+      @file_system_manager = FileSystemManager.new(@config)
+    end
+
+    def execute
+      filesystem = @file_system_manager.choose_filesystem
+      raise Models::InvalidFilesystemError.new("Invalid filesystem") if filesystem.nil?
+      # @file_system_manager.mount_or_umount(filesystem)
+      filesystem.mount
+      @file_system_manager.auto_open(filesystem) if filesystem.mounted? && @config.auto_open
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::MappingMount
+    end
+  end
+end

src/commands/mapping_umount.cr

@@ -0,0 +1,24 @@
+require "./abstract_command"
+require "../file_system_manager"
+
+module GX::Commands
+  class MappingUmount < AbstractCommand
+    @file_system_manager : FileSystemManager
+
+    def initialize(@config : GX::Config) # FIXME
+      @config.load_from_env
+      @config.load_from_file
+      @file_system_manager = FileSystemManager.new(@config)
+    end
+
+    def execute
+      filesystem = @file_system_manager.choose_filesystem
+      raise Models::InvalidFilesystemError.new("Invalid filesystem") if filesystem.nil?
+      filesystem.umount
+    end
+
+    def self.handles_mode
+      GX::Types::Mode::MappingUmount
+    end
+  end
+end

src/config.cr

@@ -6,6 +6,11 @@
 require "crinja"
 
 require "./models"
+require "./types/modes"
+require "./parsers/options/help_options"
+require "./parsers/options/config_options"
+require "./parsers/options/config_init_options"
+require "./commands/abstract_command"
 
 module GX
   class Config
@@ -14,14 +19,6 @@ module GX
     class MissingFileError < Exception
     end
 
-    enum Mode
-      ConfigAdd
-      ConfigDelete
-      ConfigEdit
-      ShowVersion
-      Mount
-    end
-
     record NoArgs
     record AddArgs, name : String, path : String
     record DelArgs, name : String
@@ -31,26 +28,31 @@ module GX
     getter root : Models::RootConfig?
 
     property verbose : Bool
-    property mode : Mode
+    property mode : Types::Mode
     property path : String?
     property args : AddArgs.class | DelArgs.class | NoArgs.class
     property auto_open : Bool
 
-    def initialize()
+    # FIXME: refactor and remove these parts from here
+    property help_options : Parsers::Options::HelpOptions?
+    property config_init_options : Parsers::Options::ConfigInitOptions?
+    property config_options : Parsers::Options::ConfigOptions?
+
+    def initialize
       raise Models::InvalidEnvironmentError.new("Home directory not found") if !ENV["HOME"]?
       @home_dir = ENV["HOME"]
 
       @verbose = false
       @auto_open = false
 
-      @mode = Mode::Mount
+      @mode = Types::Mode::GlobalTui
       @filesystems = [] of Models::AbstractFilesystemConfig
       @path = nil
 
       @args = NoArgs
     end
 
-    private def detect_config_file()
+    private def detect_config_file
       possible_files = [
         File.join(@home_dir, ".config", "mfm", "config.yaml"),
         File.join(@home_dir, ".config", "mfm", "config.yml"),
@@ -73,8 +75,8 @@ module GX
       raise MissingFileError.new("Configuration file not found")
     end
 
-    def load_from_env()
-      if !ENV["FZF_DEFAULT_OPTS"]? 
+    def load_from_env
+      if !ENV["FZF_DEFAULT_OPTS"]?
         # force defaults settings if none defined
         ENV["FZF_DEFAULT_OPTS"] = "--height 40% --layout=reverse --border"
       end
@@ -93,7 +95,7 @@ module GX
       end
 
       file_data = File.read(config_path)
-      file_patched = Crinja.render(file_data, {"env" => ENV.to_h}) 
+      file_patched = Crinja.render(file_data, {"env" => ENV.to_h})
 
       root = Models::RootConfig.from_yaml(file_patched)
 
@@ -102,7 +104,7 @@ module GX
 
       root.filesystems.each do |selected_filesystem|
         if !selected_filesystem.mount_point?
-          selected_filesystem.mount_point = 
+          selected_filesystem.mount_point =
             File.join(mount_point_base_safe, selected_filesystem.mounted_name)
         end
       end

src/file_system_manager.cr

@@ -0,0 +1,142 @@
+# require "./models/abstract_filesystem_config"
+require "./utils/fzf"
+
+module GX
+  class FileSystemManager
+    Log = ::Log.for("file_system_manager")
+
+    def initialize(@config : Config)
+    end
+
+    # OBSOLETE:
+    # def mount_filesystem(filesystem : Models::AbstractFilesystemConfig)
+    #   raise Models::InvalidFilesystemError.new("Invalid filesystem") if filesystem.nil?
+    #   if filesystem.mounted?
+    #     Log.info { "Filesystem already mounted." }
+    #     return
+    #   end
+    #   filesystem.mount
+    # end
+
+    # OBSOLETE:
+    # def umount_filesystem(filesystem : Models::AbstractFilesystemConfig)
+    #   raise Models::InvalidFilesystemError.new("Invalid filesystem") if filesystem.nil?
+    #   unless filesystem.mounted?
+    #     Log.info { "Filesystem is not mounted." }
+    #     return
+    #   end
+    #   filesystem.umount
+    # end
+
+    def mount_or_umount(selected_filesystem)
+      if !selected_filesystem.mounted?
+        selected_filesystem.mount
+      else
+        selected_filesystem.umount
+      end
+    end
+
+    def auto_open(filesystem)
+      # FIXME: detect xdg-open and use it if possible
+      # FIXME: detect mailcap and use it if no xdg-open found
+      # FIXME: support user-defined command in configuration
+      # FIXME: detect graphical environment
+
+      mount_point_safe = filesystem.mount_point
+      raise Models::InvalidMountpointError.new("Invalid filesystem") if mount_point_safe.nil?
+
+      if graphical_environment?
+        process = Process.new(
+          "xdg-open", # # FIXME: make configurable
+          [mount_point_safe],
+          input: STDIN,
+          output: STDOUT,
+          error: STDERR
+        )
+        unless process.wait.success?
+          puts "Error opening filesystem".colorize(:red)
+          return
+        end
+      else
+        process = Process.new(
+          "vifm", # # FIXME: make configurable
+          [mount_point_safe],
+          input: STDIN,
+          output: STDOUT,
+          error: STDERR
+        )
+        unless process.wait.success?
+          puts "Error opening filesystem".colorize(:red)
+          return
+        end
+      end
+    end
+
+    def each(&)
+      config_root = @config.root
+      return if config_root.nil?
+
+      config_root.filesystems.each do |filesystem|
+        yield filesystem
+      end
+    end
+
+    def filesystems
+      config_root = @config.root
+      return if config_root.nil?
+
+      config_root.filesystems
+    end
+
+    def choose_filesystem
+      names_display = {} of String => NamedTuple(filesystem: Models::AbstractFilesystemConfig, ansi_name: String)
+
+      config_root = @config.root
+      return if config_root.nil?
+
+      config_root.filesystems.each do |filesystem|
+        fs_str = filesystem.type.ljust(12, ' ')
+
+        suffix = ""
+        suffix_ansi = ""
+        if filesystem.mounted?
+          suffix = "[open]"
+          suffix_ansi = "[#{"open".colorize(:green)}]"
+        end
+
+        result_name = "#{fs_str} #{filesystem.name} #{suffix}".strip
+        ansi_name = "#{fs_str.colorize(:dark_gray)} #{filesystem.name} #{suffix_ansi}".strip
+
+        names_display[result_name] = {
+          filesystem: filesystem,
+          ansi_name:  ansi_name,
+        }
+      end
+
+      # # FIXME: feat: allow to sort by name or by filesystem
+      sorted_values = names_display.values.sort_by { |item| item[:filesystem].name }
+      result_filesystem_name = Utils::Fzf.run(sorted_values.map(&.[:ansi_name])).strip
+      selected_filesystem = names_display[result_filesystem_name][:filesystem]
+      puts ">> #{selected_filesystem.name}".colorize(:yellow)
+
+      if !selected_filesystem
+        STDERR.puts "Vault not found: #{selected_filesystem}.".colorize(:red)
+        return
+      end
+      return selected_filesystem
+    end
+
+    private def generate_display_name(filesystem : Models::AbstractFilesystemConfig) : String
+      fs_str = filesystem.type.ljust(12, ' ')
+      suffix = filesystem.mounted? ? "[open]" : ""
+      "#{fs_str} #{filesystem.name} #{suffix}".strip
+    end
+
+    private def graphical_environment?
+      if ENV["DISPLAY"]? || ENV["WAYLAND_DISPLAY"]?
+        return true
+      end
+      return false
+    end
+  end
+end

src/main.cr

@@ -34,5 +34,3 @@ end
 app = GX::Cli.new
 app.parse_command_line(ARGV)
 app.run
-
-

src/models/abstract_filesystem_config.cr

@@ -17,9 +17,9 @@ module GX::Models
     # include YAML::Serializable::Strict
 
     use_yaml_discriminator "type", {
-      gocryptfs: GoCryptFSConfig, 
-      sshfs: SshFSConfig,
-      httpdirfs: HttpDirFSConfig
+      gocryptfs: GoCryptFSConfig,
+      sshfs:     SshFSConfig,
+      httpdirfs: HttpDirFSConfig,
     }
 
     getter type : String
@@ -27,12 +27,12 @@ module GX::Models
     property mount_point : String?
 
     abstract def _mount_wrapper(&block)
-    abstract def _mount_action()
-    abstract def _mounted_prefix()
-    abstract def mounted_name()
-    abstract def mounted?()
-    abstract def mount()
-    abstract def umount()
-    abstract def mount_point?()
+    abstract def _mount_action
+    abstract def _mounted_prefix
+    abstract def mounted_name
+    abstract def mounted?
+    abstract def mount
+    abstract def umount
+    abstract def mount_point?
   end
 end

src/models/concerns/base.cr

@@ -1,14 +1,13 @@
-
 module GX::Models::Concerns
   module Base
-    def mounted?() : Bool
+    def mounted? : Bool
       mount_point_safe = @mount_point
       raise InvalidMountpointError.new("Invalid mountpoint value") if mount_point_safe.nil?
 
       `mount`.includes?(" on #{mount_point_safe} type ")
     end
 
-    def umount() : Nil
+    def umount : Nil
       mount_point_safe = @mount_point
       raise InvalidMountpointError.new("Invalid mountpoint value") if mount_point_safe.nil?
 
@@ -22,11 +21,11 @@ module GX::Models::Concerns
       end
     end
 
-    def mount_point?()
+    def mount_point?
       !mount_point.nil?
     end
 
-    def mount()
+    def mount
       _mount_wrapper() do
         _mount_action
       end
@@ -52,5 +51,4 @@ module GX::Models::Concerns
       end
     end
   end
-
 end

src/models/global_config.cr

@@ -17,7 +17,7 @@ module GX::Models
     @[YAML::Field(key: "mount_point_base")]
     getter mount_point_base : String?
 
-    def after_initialize()
+    def after_initialize
       raise InvalidEnvironmentError.new("Home directory not found") if !ENV["HOME"]?
       home_dir = ENV["HOME"]
 
@@ -28,5 +28,3 @@ module GX::Models
     end
   end
 end
-
-

src/models/gocryptfs_config.cr

@@ -13,23 +13,23 @@ module GX::Models
 
     include Concerns::Base
 
-    def _mounted_prefix()
+    def _mounted_prefix
       "#{encrypted_path}"
     end
 
-    def mounted_name()
+    def mounted_name
       "#{@name}.Open"
     end
 
-    def _mount_action()
+    def _mount_action
       mount_point_safe = @mount_point
       raise InvalidMountpointError.new("Invalid mount point") if mount_point_safe.nil?
 
       process = Process.new(
-        "gocryptfs", 
-        ["-idle", "15m", @encrypted_path, mount_point_safe], 
-        input: STDIN, 
-        output: STDOUT, 
+        "gocryptfs",
+        ["-idle", "15m", @encrypted_path, mount_point_safe],
+        input: STDIN,
+        output: STDOUT,
         error: STDERR
       )
       return process.wait

src/models/httpdirfs_config.cr

@@ -13,23 +13,23 @@ module GX::Models
 
     include Concerns::Base
 
-    def _mounted_prefix()
+    def _mounted_prefix
       "httpdirfs"
     end
 
-    def mounted_name()
+    def mounted_name
       @name
     end
 
-    def _mount_action()
+    def _mount_action
       mount_point_safe = @mount_point
       raise InvalidMountpointError.new("Invalid mount point") if mount_point_safe.nil?
 
       process = Process.new(
-        "httpdirfs", 
-        ["#{@url}", mount_point_safe], 
-        input: STDIN, 
-        output: STDOUT, 
+        "httpdirfs",
+        ["#{@url}", mount_point_safe],
+        input: STDIN,
+        output: STDOUT,
         error: STDERR
       )
       return process.wait

src/models/root_config.cr

@@ -12,13 +12,13 @@ module GX::Models
   #   def self.from_yaml(ctx : YAML::ParseContext , node : YAML::Nodes::Node)
   #     l_node = node
   #     if l_node.is_a?(YAML::Nodes::Scalar)
-  #       value_patched = Crinja.render(l_node.value, {"env" => ENV.to_h}) 
+  #       value_patched = Crinja.render(l_node.value, {"env" => ENV.to_h})
   #       return value_patched
   #     end
 
   #     return "<null>"
   #   end
-  #   
+  #
   #   def self.to_yaml(value, builder : YAML::Nodes::Builder)
   #   end
   # end
@@ -27,7 +27,7 @@ module GX::Models
     include YAML::Serializable
     include YAML::Serializable::Strict
 
-    # @[YAML::Field(key: "version", converter: GX::Models::CrinjaConverter)]
+    # @[YAML::Field(key: "version", converter: GX::Models::CrinjaConverter)]
     @[YAML::Field(key: "version")]
     getter version : String
 
@@ -38,4 +38,3 @@ module GX::Models
     getter filesystems : Array(AbstractFilesystemConfig)
   end
 end
-

src/models/sshfs_config.cr

@@ -16,27 +16,27 @@ module GX::Models
 
     include Concerns::Base
 
-    def _mounted_prefix()
+    def _mounted_prefix
       "#{@remote_user}@#{@remote_host}:#{@remote_path}"
     end
 
-    def mounted_name()
+    def mounted_name
       @name
     end
 
-    def _mount_action()
+    def _mount_action
       mount_point_safe = @mount_point
       raise InvalidMountpointError.new("Invalid mount point") if mount_point_safe.nil?
 
       process = Process.new(
-        "sshfs", 
+        "sshfs",
         [
           "-p", remote_port,
-          "#{@remote_user}@#{@remote_host}:#{@remote_path}", 
-          mount_point_safe
-        ], 
-        input: STDIN, 
-        output: STDOUT, 
+          "#{@remote_user}@#{@remote_host}:#{@remote_path}",
+          mount_point_safe,
+        ],
+        input: STDIN,
+        output: STDOUT,
         error: STDERR
       )
       return process.wait

src/parsers/base.cr

@@ -0,0 +1,5 @@
+module GX::Parsers
+  abstract class AbstractParser
+    abstract def build(parser : OptionParser, ancestors : BreadCrumbs, config : Config)
+  end
+end

src/parsers/completion_parser.cr

@@ -0,0 +1,26 @@
+require "./base.cr"
+
+module GX::Parsers
+  class CompletionParser < AbstractParser
+    def build(parser, ancestors, config)
+      breadcrumbs = ancestors + "completion"
+
+      parser.banner = Utils.usage_line(
+        breadcrumbs,
+        "Manage #{PROGRAM_NAME} completion",
+        true
+      )
+      parser.separator("\nCompletion commands:")
+
+      parser.on("--bash", "Generate bash completion") do |flag|
+        Log.info { "Set bash completion" }
+      end
+
+      parser.on("--zsh", "Generate zsh completion") do |flag|
+        Log.info { "Set zsh completion" }
+      end
+
+      parser.separator Utils.help_line(breadcrumbs)
+    end
+  end
+end

src/parsers/config_parser.cr

@@ -0,0 +1,38 @@
+require "./options/config_options"
+require "./options/config_init_options"
+require "./base"
+require "../types/modes"
+require "../utils/parser_lines"
+
+module GX::Parsers
+  class ConfigParser < AbstractParser
+    def build(parser, ancestors, config)
+      breadcrumbs = ancestors + "config"
+      config.config_options = Parsers::Options::ConfigOptions.new
+      parser.banner = Utils.usage_line(
+        breadcrumbs,
+        "Helpers for #{PROGRAM_NAME}'s configuration file",
+        true
+      )
+      parser.separator("\nConfig commands")
+
+      parser.on("init", "Create initial mfm configuration") do
+        config.mode = Types::Mode::ConfigInit
+        config.config_init_options = Parsers::Options::ConfigInitOptions.new
+
+        parser.banner = Utils.usage_line(breadcrumbs + "init", "Create initial mfm configuration")
+        parser.separator("\nInit options")
+
+        parser.on("-p", "--path", "Set vault encrypted path") do |path|
+          config.config_init_options.try do |opts|
+            opts.path = path
+          end
+        end
+
+        parser.separator(Utils.help_line(breadcrumbs + "init"))
+      end
+
+      parser.separator(Utils.help_line(breadcrumbs))
+    end
+  end
+end

src/parsers/mapping_parser.cr

@@ -0,0 +1,73 @@
+require "./base.cr"
+require "../utils/parser_lines"
+
+module GX::Parsers
+  class MappingParser < AbstractParser
+    def build(parser, ancestors, config)
+      breadcrumbs = ancestors + "mapping"
+      add_args = {name: "", path: ""}
+      delete_args = {name: ""}
+
+      parser.banner = Utils.usage_line(
+        breadcrumbs,
+        "Manage FUSE filesystem mappings",
+        true
+      )
+      parser.separator("\nCommands")
+
+      parser.on("list", "List mappings") do
+        config.mode = Types::Mode::MappingList
+        parser.separator(Utils.help_line(breadcrumbs + "list"))
+        # abort("FIXME: Not implemented")
+      end
+
+      parser.on("create", "Create mapping") do
+        config.mode = Types::Mode::MappingCreate
+
+        pp parser
+        parser.banner = Utils.usage_line(breadcrumbs + "create", "Create mapping", true)
+        parser.separator("\nCreate options")
+
+        parser.on("-n", "--name", "Set vault name") do |name|
+          add_args = add_args.merge({name: name})
+        end
+        parser.on("-p", "--path", "Set vault encrypted path") do |path|
+          add_args = add_args.merge({path: path})
+        end
+        parser.separator(Utils.help_line(breadcrumbs + "create"))
+      end
+
+      parser.on("edit", "Edit configuration") do |flag|
+        config.mode = Types::Mode::MappingEdit
+        parser.separator(Utils.help_line(breadcrumbs + "edit"))
+        # abort("FIXME: Not implemented")
+      end
+
+      parser.on("mount", "Mount mapping") do |flag|
+        config.mode = Types::Mode::MappingMount
+        parser.separator(Utils.help_line(breadcrumbs + "mount"))
+        # abort("FIXME: Not implemented")
+      end
+
+      parser.on("umount", "Umount mapping") do |flag|
+        config.mode = Types::Mode::MappingUmount
+        parser.separator(Utils.help_line(breadcrumbs + "umount"))
+        # abort("FIXME: Not implemented")
+      end
+
+      parser.on("delete", "Delete mapping") do
+        config.mode = Types::Mode::MappingDelete
+
+        parser.banner = Utils.usage_line(breadcrumbs + "delete", "Delete mapping", true)
+        parser.separator("\nDelete options")
+
+        parser.on("-n", "--name", "Set vault name") do |name|
+          delete_args = delete_args.merge({name: name})
+        end
+        parser.separator(Utils.help_line(breadcrumbs + "delete"))
+      end
+
+      parser.separator Utils.help_line(breadcrumbs)
+    end
+  end
+end

src/parsers/options/config_init_options.cr

@@ -0,0 +1,7 @@
+require "option_parser"
+
+module GX::Parsers::Options
+  class ConfigInitOptions
+    property path : String?
+  end
+end

src/parsers/options/config_options.cr

@@ -0,0 +1,6 @@
+require "option_parser"
+
+module GX::Parsers::Options
+  class ConfigOptions
+  end
+end

src/parsers/options/help_options.cr

@@ -0,0 +1,7 @@
+require "option_parser"
+
+module GX::Parsers::Options
+  class HelpOptions
+    property parser_snapshot : OptionParser? = nil
+  end
+end

src/parsers/root_parser.cr

@@ -0,0 +1,92 @@
+require "./base"
+require "./config_parser"
+require "./mapping_parser"
+require "./completion_parser"
+require "../utils/parser_lines"
+require "../commands"
+
+module GX::Parsers
+  class RootParser < AbstractParser
+    def build(parser, ancestors, config)
+      breadcrumbs = ancestors + (File.basename PROGRAM_NAME)
+
+      parser.banner = Utils.usage_line(
+        breadcrumbs,
+        "A management tool for your various FUSE filesystems",
+        true
+      )
+
+      parser.on("-c", "--config FILE", "Set configuration file") do |path|
+        Log.info { "Configuration set to #{path}" }
+        config.path = path
+      end
+
+      parser.on("-v", "--verbose", "Set more verbosity") do |flag|
+        Log.info { "Verbosity enabled" }
+        config.verbose = true
+      end
+
+      parser.on("-o", "--open", "Automatically open directory after mount") do |flag|
+        Log.info { "Auto-open enabled" }
+        config.auto_open = true
+      end
+
+      parser.on("--version", "Show version") do |flag|
+        config.mode = Types::Mode::GlobalVersion
+      end
+
+      parser.on("-h", "--help", "Show this help") do |flag|
+        config.mode = Types::Mode::GlobalHelp
+        config.help_options = Parsers::Options::HelpOptions.new
+        config.help_options.try { |opts| opts.parser_snapshot = parser.dup }
+      end
+
+      parser.separator("\nGlobal commands:")
+
+      parser.on("config", "Manage configuration file") do
+        config.mode = Types::Mode::GlobalHelp
+        config.help_options = Parsers::Options::HelpOptions.new
+        config.help_options.try { |opts| opts.parser_snapshot = parser.dup }
+
+        # config.command = Commands::Config.new(config)
+        Parsers::ConfigParser.new.build(parser, breadcrumbs, config)
+      end
+
+      parser.on("tui", "Interactive text user interface (default)") do
+        config.mode = Types::Mode::GlobalTui
+      end
+
+      parser.on("mapping", "Manage mappings") do
+        config.mode = Types::Mode::GlobalHelp
+        config.help_options = Parsers::Options::HelpOptions.new
+        config.help_options.try { |opts| opts.parser_snapshot = parser.dup }
+
+        Parsers::MappingParser.new.build(parser, breadcrumbs, config)
+      end
+
+      # parser.on("interactive", "Interactive mapping mount/umount") do
+      #   abort("FIXME: Not implemented")
+      # end
+
+      parser.on("completion", "Manage completion") do
+        config.mode = Types::Mode::GlobalCompletion
+        Parsers::CompletionParser.new.build(parser, breadcrumbs, config)
+      end
+
+      parser.separator(Utils.help_line(breadcrumbs))
+
+      # Manage errors
+      parser.unknown_args do |remaining_args, _|
+        next if remaining_args.size == 0
+
+        puts parser
+        abort("ERROR: Invalid arguments: #{remaining_args.join(" ")}")
+      end
+
+      parser.invalid_option do |ex|
+        puts parser
+        abort("ERROR: Invalid option: '#{ex}'!")
+      end
+    end
+  end
+end

src/types/modes.cr

@@ -0,0 +1,21 @@
+module GX::Types
+  enum Mode
+    None
+
+    GlobalVersion
+    GlobalHelp
+    GlobalCompletion
+    GlobalTui
+    GlobalConfig
+    GlobalMapping
+
+    ConfigInit
+
+    MappingCreate
+    MappingDelete
+    MappingEdit
+    MappingList
+    MappingMount
+    MappingUmount
+  end
+end

src/utils/breadcrumbs.cr

@@ -0,0 +1,19 @@
+module GX::Utils
+  class BreadCrumbs
+    def initialize(base : Array(String))
+      @ancestors = base
+    end
+
+    def +(elem : String)
+      b = BreadCrumbs.new(@ancestors + [elem])
+    end
+
+    def to_s
+      @ancestors.join(" ")
+    end
+
+    def to_a
+      @ancestors.clone
+    end
+  end
+end

src/utils/fzf.cr

@@ -3,9 +3,8 @@
 # SPDX-FileCopyrightText: 2023 Glenn Y. Rolland <glenux@glenux.net>
 # Copyright © 2023 Glenn Y. Rolland <glenux@glenux.net>
 
-module GX
+module GX::Utils
   class Fzf
-
     def self.run(list : Array(String)) : String
       input = IO::Memory.new
       input.puts list.join("\n")
@@ -29,8 +28,7 @@ module GX
         exit(1)
       end
 
-      result = output.to_s.strip #.split.first?
+      result = output.to_s.strip # .split.first?
     end
   end
 end
-

src/utils/parser_lines.cr

@@ -0,0 +1,17 @@
+require "./breadcrumbs"
+
+module GX::Utils
+  def self.usage_line(breadcrumbs : BreadCrumbs, description : String, has_commands : Bool = false)
+    [
+      "Usage: #{breadcrumbs.to_s}#{has_commands ? " [commands]" : ""} [options]",
+      "",
+      description,
+      "",
+      "Global options:",
+    ].join("\n")
+  end
+
+  def self.help_line(breadcrumbs : BreadCrumbs)
+    "\nRun '#{breadcrumbs.to_s} COMMAND --help' for more information on a command."
+  end
+end

src/version.cr

@@ -1,8 +1,5 @@
-
 require "version_from_shard"
 
 module GX
   VersionFromShard.declare
 end
-
-