checkpoint: new trainer package; removed state type

internal/trainer/trainer.go

@@ -0,0 +1,52 @@
+package trainer
+
+import "codeflow.dananglin.me.uk/apollo/pokedex/internal/api/pokeapi"
+
+type Trainer struct {
+	previousLocationArea  *string
+	nextLocationArea      *string
+	currentLocationAreaID int
+	pokedex               map[string]pokeapi.Pokemon
+}
+
+func NewTrainer() *Trainer {
+	trainer := Trainer{
+		previousLocationArea:  nil,
+		nextLocationArea:      nil,
+		currentLocationAreaID: 0,
+		pokedex:               make(map[string]pokeapi.Pokemon),
+	}
+
+	return &trainer
+}
+
+func (t *Trainer) UpdateLocationAreas(previous, next *string) {
+	t.previousLocationArea = previous
+	t.nextLocationArea = next
+}
+
+func (t *Trainer) PreviousLocationArea() *string {
+	return t.previousLocationArea
+}
+
+func (t *Trainer) NextLocationArea() *string {
+	return t.nextLocationArea
+}
+
+func (t *Trainer) AddPokemonToPokedex(name string, details pokeapi.Pokemon) {
+	t.pokedex[name] = details
+}
+
+func (t *Trainer) GetPokemonFromPokedex(name string) (pokeapi.Pokemon, bool) {
+	details, ok := t.pokedex[name]
+
+	return details, ok
+}
+
+func (t *Trainer) CurrentLocationAreaID() int {
+	return t.currentLocationAreaID
+}
+
+func (t *Trainer) UpdateCurrentLocationAreaID(locationAreaID int) {
+	t.currentLocationAreaID = locationAreaID
+}

main.go

@@ -13,13 +13,9 @@ import (
 
 	"codeflow.dananglin.me.uk/apollo/pokedex/internal/api/pokeapi"
 	"codeflow.dananglin.me.uk/apollo/pokedex/internal/pokeclient"
+	"codeflow.dananglin.me.uk/apollo/pokedex/internal/trainer"
 )
 
-type State struct {
-	Previous *string
-	Next     *string
-}
-
 type command struct {
 	name        string
 	description string
@@ -42,7 +38,7 @@ func run() {
 		10*time.Second,
 	)
 
-	var state State
+	trainer := trainer.NewTrainer()
 
 	commandMap := map[string]command{
 		"exit": {
@@ -58,12 +54,12 @@ func run() {
 		"map": {
 			name:        "map",
 			description: "Displays the next 20 locations in the Pokemon world",
-			callback:    mapFunc(client, &state),
+			callback:    mapFunc(client, trainer),
 		},
 		"mapb": {
 			name:        "map back",
 			description: "Displays the previous 20 locations in the Pokemon world",
-			callback:    mapBFunc(client, &state),
+			callback:    mapBFunc(client, trainer),
 		},
 		"explore": {
 			name:        "explore",
@@ -158,26 +154,26 @@ func exitFunc(_ []string) error {
 	return nil
 }
 
-func mapFunc(client *pokeclient.Client, state *State) callbackFunc {
+func mapFunc(client *pokeclient.Client, trainer *trainer.Trainer) callbackFunc {
 	return func(_ []string) error {
-		url := state.Next
+		url := trainer.NextLocationArea()
 		if url == nil {
 			url = new(string)
 			*url = pokeclient.LocationAreaPath
 		}
 
-		return printResourceList(client, *url, state)
+		return printResourceList(client, *url, trainer.UpdateLocationAreas)
 	}
 }
 
-func mapBFunc(client *pokeclient.Client, state *State) callbackFunc {
+func mapBFunc(client *pokeclient.Client, trainer *trainer.Trainer) callbackFunc {
 	return func(_ []string) error {
-		url := state.Previous
+		url := trainer.PreviousLocationArea()
 		if url == nil {
 			return fmt.Errorf("no previous locations available")
 		}
 
-		return printResourceList(client, *url, state)
+		return printResourceList(client, *url, trainer.UpdateLocationAreas)
 	}
 }
 
@@ -320,14 +316,19 @@ func pokedexFunc() callbackFunc {
 	}
 }
 
-func printResourceList(client *pokeclient.Client, url string, state *State) error {
+func printResourceList(
+	client *pokeclient.Client,
+	url string,
+	updateStateFunc func(previous *string, next *string),
+) error {
 	list, err := client.GetNamedAPIResourceList(url)
 	if err != nil {
 		return fmt.Errorf("unable to get the list of resources: %w", err)
 	}
 
-	state.Next = list.Next
+	if updateStateFunc != nil {
-	state.Previous = list.Previous
+		updateStateFunc(list.Previous, list.Next)
+	}
 
 	for _, location := range slices.All(list.Results) {
 		fmt.Println(location.Name)