help.go

// Copyright 2015 Factom Foundation
// Use of this source code is governed by the MIT
// license that can be found in the LICENSE file.
package main

import (
	"fmt"
	"strings"
)

type Help struct {
	ICommand
}

func (h Help) Execute(state IState, args []string) error {
	if len(args) == 1 || len(args) > 2 {
		fmt.Println(h.ShortHelp())
		return nil
	}
	if strings.ToLower(args[1]) == "all" {
		keys := make([]string, 0, len(state.GetCommands()))
		for key, _ := range state.GetCommands() {
			keys = append(keys, key)
		}
		for i := 0; i < len(keys)-1; i++ {
			for j := 0; j < len(keys)-1-i; j++ {
				if keys[j] > keys[j+1] {
					t := keys[j]
					keys[j] = keys[j+1]
					keys[j+1] = t
				}
			}
		}
		for _, key := range keys {
			fmt.Println(state.GetCommands()[key].LongHelp())
		}
	}
	c := state.GetCommands()[strings.ToLower(args[1])]
	if c != nil {
		fmt.Println(c.LongHelp())
	} else {
		if strings.ToLower(args[1]) != "all" {
			return fmt.Errorf("Unknown Command")
		}
	}
	return nil
}

func (Help) Name() string {
	return "Help"
}

func (Help) ShortHelp() string {
	return "Help <all|cmd> -- Help all prints help on all commands.\n" +
		"                  Help <cmd> prints the detailed help on the given command."
}

func (Help) LongHelp() string {
	return `
Help <all|cmd>                      Help facility for the Factom Wallet App.  Returns 
                                    help on all commands, or on individual specified
                                    commands.
`
}