pokedex_cli/repl.go

package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
	"time"

	"k3gtpi.jumpingcrab.com/go-learning/pokedexcli/internal/pokecache"
)

type cliCommand struct {
	name        string
	description string
	callback    func(*PokedexConfig, *string) error
}

type PokedexLocationData struct {
	Next      *string             `json:"next"`
	Previous  *string             `json:"previous"`
	Locations []map[string]string `json:"results"`
}

type PokemonSummary struct {
	Name    string `json:"name"`
	DataUrl string `json:"url"`
}

type PokemonStat struct {
	Name string `json:"name"`
}

type PokemonStats struct {
	BaseStat int         `json:"base_stat"`
	PokeStat PokemonStat `json:"stat"`
}

type PokemonTypeEntry struct {
	Name string `json:"name"`
}

type PokemonTypes struct {
	PokeType PokemonTypeEntry `json:"type"`
}

type PokemonDetails struct {
	Name           string         `json:"name"`
	BaseExperience int            `json:"base_experience"`
	Weight         int            `json:"weight"`
	Height         int            `json:"height"`
	PokeStats      []PokemonStats `json:"stats"`
	PokeTypes      []PokemonTypes `json:"types"`
}

type PokemonEncounterData struct {
	PokemonSummary PokemonSummary `json:"pokemon"`
}

type PokedexLocalPokemons struct {
	LocationName      string                 `json:"name"`
	PokemonEncounters []PokemonEncounterData `json:"pokemon_encounters"`
}

type PokedexConfig struct {
	Cache         *pokecache.Cache
	LocationData  PokedexLocationData
	LocalPokemons PokedexLocalPokemons
	CaughtPokemon []PokemonDetails
}

func startRepl() {
	reader := bufio.NewScanner(os.Stdin)
	fmt.Println("Welcome to the Pokedex!")
	pokedexConfig := PokedexConfig{}
	pokedexConfig.Cache = pokecache.NewCache(5 * time.Second)
	for {
		fmt.Printf("Pokedex > ")
		reader.Scan()

		words := cleanInput(reader.Text())
		if len(words) == 0 {
			continue
		} else if len(words) > 2 {
			fmt.Printf("Commands can only take one argument!")
			continue
		}

		commandName := words[0]

		command, valid := getCommands()[commandName]
		if !valid {
			fmt.Println("Unknown command.")
			continue
		}

		arg := ""
		if len(words) == 2 {
			arg = words[1]
		}

		if err := command.callback(&pokedexConfig, &arg); err != nil {
			fmt.Printf("Encountered error running command: %v\nErr: %v\n\n", command.name, err)
		}
	}
}

func cleanInput(text string) []string {
	if len(text) == 0 {
		fmt.Println("Input is empty!")
		return []string{}
	}
	output := strings.ToLower(text)
	words := strings.Fields(output)
	return words
}

func getCommands() map[string]cliCommand {
	return map[string]cliCommand{
		"help": {
			name:        "help",
			description: "Prints this help menu.",
			callback:    commandHelp,
		},
		"exit": {
			name:        "exit",
			description: "Exits the Pokedex",
			callback:    commandExit,
		},
		"map": {
			name:        "map",
			description: "Print Pokemon world locations.",
			callback:    commandMap,
		},
		"mapb": {
			name:        "mapb",
			description: "Print previous Pokemon locations.",
			callback:    commandMapb,
		},
		"explore": {
			name:        "explore",
			description: "Print Pokemon found in specified area. Requires AREA_NAME argument.",
			callback:    commandExplore,
		},
		"catch": {
			name:        "catch",
			description: "Attempt to catch a Pokemon present in current area. Requires POKEMON_NAME argument.",
			callback:    commandCatch,
		},
		"inspect": {
			name:        "inspect",
			description: "Inspect a caught Pokemon. Requires POKEMON_NAME argument.",
			callback:    commandInspect,
		},
		"pokedex": {
			name:        "pokedex",
			description: "Inspect the Pokedex contents.",
			callback:    commandPokedex,
		},
	}
}