generated from templates/go-generic
checkpoint: add explore command
Add the explore command to list the pokemon in a given location area.
This commit is contained in:
parent
b6088bfd88
commit
578c781907
3 changed files with 180 additions and 65 deletions
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@ -1,50 +1,50 @@
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package pokeapi
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// LocationArea is a section of areas such as floors in a building or a cave.
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//type LocationArea struct {
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// ID int `json:"id"`
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// Name string `json:"name"`
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// GameIndex int `json:"game_index"`
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// EncounterMethodRates []EncounterMethodRate `json:"encounter_method_rates"`
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// Location NamedAPIResource `json:"location"`
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// Names []Name `json:"names"`
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// PokemonEncounters []PokemonEncounter `json:"pokemon_encounters"`
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//}
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//
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//type EncounterMethodRate struct {
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// EncounterMethod NamedAPIResource `json:"encounter_method"`
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// VersionDetails EncounterVersionDetails `json:"version_details"`
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//}
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//
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//type EncounterVersionDetails struct {
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// Rate int `json:"rate"`
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// Version NamedAPIResource `json:"version"`
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//}
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//
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//type Name struct {
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// Name string `json:"name"`
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// Language NamedAPIResource `json:"language"`
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//}
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//
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//// PokemonEncounter is details of a possible Pokemon encounter.
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//type PokemonEncounter struct {
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// Pokemon NamedAPIResource `json:"pokemon"`
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// VersionDetails []VersionEncounterDetails `json:"version_details"`
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//}
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//
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//type VersionEncounterDetails struct {
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// Version NamedAPIResource `json:"version"`
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// MaxChance int `json:"max_chance"`
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// EncounterDetails []Encounter `json:"encounter_details"`
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//}
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//
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//type Encounter struct {
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// MinLevel int `json:"min_level"`
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// MaxLevel int `json:"max_level"`
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// ConditionValues []NamedAPIResource `json:"condition_values"`
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// Chance int `json:"chance"`
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// Method NamedAPIResource `json:"method"`
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//}
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type LocationArea struct {
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ID int `json:"id"`
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Name string `json:"name"`
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GameIndex int `json:"game_index"`
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EncounterMethodRates []EncounterMethodRate `json:"encounter_method_rates"`
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Location NamedAPIResource `json:"location"`
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Names []Name `json:"names"`
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PokemonEncounters []PokemonEncounter `json:"pokemon_encounters"`
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}
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type EncounterMethodRate struct {
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EncounterMethod NamedAPIResource `json:"encounter_method"`
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VersionDetails []EncounterVersionDetails `json:"version_details"`
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}
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type EncounterVersionDetails struct {
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Rate int `json:"rate"`
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Version NamedAPIResource `json:"version"`
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}
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type Name struct {
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Name string `json:"name"`
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Language NamedAPIResource `json:"language"`
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}
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// PokemonEncounter is details of a possible Pokemon encounter.
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type PokemonEncounter struct {
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Pokemon NamedAPIResource `json:"pokemon"`
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VersionDetails []VersionEncounterDetails `json:"version_details"`
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}
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type VersionEncounterDetails struct {
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Version NamedAPIResource `json:"version"`
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MaxChance int `json:"max_chance"`
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EncounterDetails []Encounter `json:"encounter_details"`
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}
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type Encounter struct {
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MinLevel int `json:"min_level"`
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MaxLevel int `json:"max_level"`
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ConditionValues []NamedAPIResource `json:"condition_values"`
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Chance int `json:"chance"`
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Method NamedAPIResource `json:"method"`
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}
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type NamedAPIResourceList struct {
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Count int `json:"count"`
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@ -12,6 +12,12 @@ import (
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"codeflow.dananglin.me.uk/apollo/pokedex/internal/pokecache"
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)
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const (
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baseURL string = "https://pokeapi.co/api/v2"
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LocationAreaEndpoint = baseURL + "/location-area"
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)
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type Client struct {
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httpClient http.Client
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cache *pokecache.Cache
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@ -38,7 +44,7 @@ func (c *Client) GetNamedAPIResourceList(url string) (pokeapi.NamedAPIResourceLi
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fmt.Println("Using data from cache.")
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if err := decodeJSON(dataFromCache, &list); err != nil {
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return pokeapi.NamedAPIResourceList{}, fmt.Errorf("unable to decode the data from cache: %w", err)
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return pokeapi.NamedAPIResourceList{}, fmt.Errorf("unable to decode the data from the cache: %w", err)
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}
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return list, nil
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@ -84,6 +90,62 @@ func (c *Client) GetNamedAPIResourceList(url string) (pokeapi.NamedAPIResourceLi
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return list, nil
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}
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func (c *Client) GetLocationArea(location string) (pokeapi.LocationArea, error) {
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var locationArea pokeapi.LocationArea
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url := LocationAreaEndpoint + "/" + location + "/"
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dataFromCache, exists := c.cache.Get(url)
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if exists {
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fmt.Println("Using data from cache.")
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if err := decodeJSON(dataFromCache, &locationArea); err != nil {
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return pokeapi.LocationArea{}, fmt.Errorf("unable to decode the data from the cache: %w", err)
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}
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return locationArea, nil
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}
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ctx, cancel := context.WithTimeout(context.Background(), c.timeout)
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defer cancel()
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request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return pokeapi.LocationArea{}, fmt.Errorf("error creating the HTTP request: %w", err)
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}
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resp, err := c.httpClient.Do(request)
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if err != nil {
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return pokeapi.LocationArea{}, fmt.Errorf("error getting the response from the server: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode >= 400 {
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return pokeapi.LocationArea{}, fmt.Errorf(
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"received a bad status from %s: (%d) %s",
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url,
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resp.StatusCode,
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resp.Status,
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)
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return pokeapi.LocationArea{}, fmt.Errorf(
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"unable to read the response from the server: %w",
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err,
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)
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}
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if err := decodeJSON(body, &locationArea); err != nil {
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return pokeapi.LocationArea{}, fmt.Errorf("unable to decode the data from the server: %w", err)
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}
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c.cache.Add(url, body)
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return locationArea, nil
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}
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func decodeJSON(data []byte, value any) error {
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if err := json.Unmarshal(data, value); err != nil {
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return fmt.Errorf("unable to decode the JSON data: %w", err)
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93
main.go
93
main.go
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@ -2,20 +2,17 @@ package main
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import (
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"bufio"
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"errors"
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"fmt"
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"maps"
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"os"
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"slices"
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"strings"
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"time"
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"codeflow.dananglin.me.uk/apollo/pokedex/internal/pokeclient"
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)
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const (
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baseURL string = "https://pokeapi.co/api/v2"
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locationAreaEndpoint string = "/location-area"
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)
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type State struct {
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Previous *string
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Next *string
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@ -29,7 +26,7 @@ type command struct {
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callback callbackFunc
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}
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type callbackFunc func() error
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type callbackFunc func(args []string) error
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func main() {
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run()
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@ -45,7 +42,7 @@ func run() {
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"exit": {
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name: "exit",
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description: "Exit the Pokedex",
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callback: commandExit,
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callback: exitFunc,
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},
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"help": {
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name: "help",
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@ -55,12 +52,17 @@ func run() {
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"map": {
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name: "map",
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description: "Displays the next 20 locations in the Pokemon world",
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callback: commandMap(client),
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callback: mapFunc(client),
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},
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"mapb": {
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name: "map back",
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description: "Displays the previous 20 locations in the Pokemon world",
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callback: commandMapB(client),
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callback: mapBFunc(client),
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},
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"explore": {
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name: "explore",
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description: "Lists all the pokemon in a given area",
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callback: exploreFunc(client),
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},
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}
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@ -69,7 +71,7 @@ func run() {
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commandMap["help"] = command{
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name: "help",
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description: "Displays a help message",
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callback: commandHelp(summaries),
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callback: helpFunc(summaries),
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}
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fmt.Printf("\nWelcome to the Pokedex!\n")
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@ -78,7 +80,9 @@ func run() {
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scanner := bufio.NewScanner(os.Stdin)
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for scanner.Scan() {
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command := scanner.Text()
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input := scanner.Text()
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command, args := parseArgs(input)
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cmd, ok := commandMap[command]
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if !ok {
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@ -97,7 +101,7 @@ func run() {
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continue
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}
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if err := commandMap[command].callback(); err != nil {
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if err := commandMap[command].callback(args); err != nil {
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fmt.Printf("ERROR: %v.\n", err)
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}
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@ -105,8 +109,8 @@ func run() {
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}
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}
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func commandHelp(summaries map[string]string) callbackFunc {
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return func() error {
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func helpFunc(summaries map[string]string) callbackFunc {
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return func(_ []string) error {
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keys := []string{}
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for key := range maps.All(summaries) {
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}
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}
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func commandExit() error {
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func exitFunc(_ []string) error {
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os.Exit(0)
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return nil
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}
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func commandMap(client *pokeclient.Client) callbackFunc {
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return func() error {
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func mapFunc(client *pokeclient.Client) callbackFunc {
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return func(_ []string) error {
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url := state.Next
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if url == nil {
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url = new(string)
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*url = baseURL + locationAreaEndpoint
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*url = pokeclient.LocationAreaEndpoint
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}
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return printResourceList(client, *url)
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}
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}
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func commandMapB(client *pokeclient.Client) callbackFunc {
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return func() error {
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func mapBFunc(client *pokeclient.Client) callbackFunc {
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return func(_ []string) error {
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url := state.Previous
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if url == nil {
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return fmt.Errorf("no previous locations available")
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@ -156,6 +160,41 @@ func commandMapB(client *pokeclient.Client) callbackFunc {
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}
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}
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func exploreFunc(client *pokeclient.Client) callbackFunc {
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return func(args []string) error {
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if args == nil {
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return errors.New("the location has not been specified")
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}
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if len(args) != 1 {
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return fmt.Errorf(
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"unexpected number of locations: want 1; got %d",
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len(args),
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)
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}
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location := args[0]
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fmt.Println("Exploring", location)
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locationArea, err := client.GetLocationArea(location)
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if err != nil {
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return fmt.Errorf(
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"unable to get the location area: %w",
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err,
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)
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}
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fmt.Println("Found Pokemon:")
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for _, encounter := range slices.All(locationArea.PokemonEncounters) {
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fmt.Printf("- %s\n", encounter.Pokemon.Name)
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}
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return nil
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}
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}
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func printResourceList(client *pokeclient.Client, url string) error {
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list, err := client.GetNamedAPIResourceList(url)
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if err != nil {
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@ -181,3 +220,17 @@ func summaryMap(commandMap map[string]command) map[string]string {
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return summaries
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}
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func parseArgs(input string) (string, []string) {
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split := strings.Split(input, " ")
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if len(split) == 0 {
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return "", nil
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}
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if len(split) == 1 {
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return split[0], nil
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}
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return split[0], split[1:]
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}
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