From 0148583f5bb8e4c0019872cbea38f421f60f7f26 Mon Sep 17 00:00:00 2001
From: Darius Rapalis <info@rdarius.lt>
Date: Mon, 10 Mar 2025 22:14:46 +0200
Subject: [PATCH] #5

---
 main.go                    | 71 ++++++++++++++++++++++++++++++++++----
 pokeapi/client.go          | 20 +++++++++++
 pokeapi/location_list.go   | 42 ++++++++++++++++++++++
 pokeapi/pokeapi.go         |  5 +++
 pokeapi/types_locations.go | 12 +++++++
 5 files changed, 144 insertions(+), 6 deletions(-)
 create mode 100644 pokeapi/client.go
 create mode 100644 pokeapi/location_list.go
 create mode 100644 pokeapi/pokeapi.go
 create mode 100644 pokeapi/types_locations.go

diff --git a/main.go b/main.go
index f46e80f..34d9ba5 100644
--- a/main.go
+++ b/main.go
@@ -2,20 +2,35 @@ package main
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
+	"github.com/rdarius/boot-dev-pokedex/pokeapi"
 	"os"
 	"strings"
+	"time"
 )
 
+type config struct {
+	pokeapiClient    pokeapi.Client
+	nextLocationsURL *string
+	prevLocationsURL *string
+}
+
 type cliCommand struct {
 	name        string
 	description string
-	callback    func() error
+	callback    func(*config) error
 }
 
 var commands map[string]cliCommand
 
 func main() {
+
+	pokeClient := pokeapi.NewClient(5 * time.Second)
+	cfg := &config{
+		pokeapiClient: pokeClient,
+	}
+
 	commands = map[string]cliCommand{
 		"exit": {
 			name:        "exit",
@@ -27,6 +42,16 @@ func main() {
 			description: "Display a help message",
 			callback:    printHelpMessage,
 		},
+		"map": {
+			name:        "map",
+			description: "Get the next page of locations",
+			callback:    commandMapf,
+		},
+		"mapb": {
+			name:        "mapb",
+			description: "Get the previous page of locations",
+			callback:    commandMapb,
+		},
 	}
 	for {
 		// read user input
@@ -40,7 +65,7 @@ func main() {
 			//check if command is in commands map
 			cmd, ok := commands[command]
 			if ok {
-				err := cmd.callback()
+				err := cmd.callback(cfg)
 				if err != nil {
 					fmt.Println(err)
 				}
@@ -52,7 +77,7 @@ func main() {
 	}
 }
 
-func commandExit() error {
+func commandExit(*config) error {
 	fmt.Println("Closing the Pokedex... Goodbye!")
 	os.Exit(0)
 	return nil
@@ -70,10 +95,44 @@ func cleanInput(text string) []string {
 	return separated
 }
 
-func printHelpMessage() error {
+func printHelpMessage(*config) error {
 	fmt.Print("Welcome to the Pokedex!\nUsage:\n\n")
-	for k, v := range commands {
-		fmt.Printf("%s: %s\n", k, v.description)
+	for _, v := range commands {
+		fmt.Printf("%s: %s\n", v.name, v.description)
+	}
+	return nil
+}
+
+func commandMapf(cfg *config) error {
+	locationsResp, err := cfg.pokeapiClient.ListLocations(cfg.nextLocationsURL)
+	if err != nil {
+		return err
+	}
+
+	cfg.nextLocationsURL = locationsResp.Next
+	cfg.prevLocationsURL = locationsResp.Previous
+
+	for _, loc := range locationsResp.Results {
+		fmt.Println(loc.Name)
+	}
+	return nil
+}
+
+func commandMapb(cfg *config) error {
+	if cfg.prevLocationsURL == nil {
+		return errors.New("you're on the first page")
+	}
+
+	locationResp, err := cfg.pokeapiClient.ListLocations(cfg.prevLocationsURL)
+	if err != nil {
+		return err
+	}
+
+	cfg.nextLocationsURL = locationResp.Next
+	cfg.prevLocationsURL = locationResp.Previous
+
+	for _, loc := range locationResp.Results {
+		fmt.Println(loc.Name)
 	}
 	return nil
 }
diff --git a/pokeapi/client.go b/pokeapi/client.go
new file mode 100644
index 0000000..61e89dc
--- /dev/null
+++ b/pokeapi/client.go
@@ -0,0 +1,20 @@
+package pokeapi
+
+import (
+	"net/http"
+	"time"
+)
+
+// Client -
+type Client struct {
+	httpClient http.Client
+}
+
+// NewClient -
+func NewClient(timeout time.Duration) Client {
+	return Client{
+		httpClient: http.Client{
+			Timeout: timeout,
+		},
+	}
+}
diff --git a/pokeapi/location_list.go b/pokeapi/location_list.go
new file mode 100644
index 0000000..df2fefe
--- /dev/null
+++ b/pokeapi/location_list.go
@@ -0,0 +1,42 @@
+package pokeapi
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+)
+
+// ListLocations -
+func (c *Client) ListLocations(pageURL *string) (RespShallowLocations, error) {
+	url := baseURL + "/location-area"
+	if pageURL != nil {
+		url = *pageURL
+	}
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return RespShallowLocations{}, err
+	}
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return RespShallowLocations{}, err
+	}
+
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
+
+	dat, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return RespShallowLocations{}, err
+	}
+
+	locationsResp := RespShallowLocations{}
+	err = json.Unmarshal(dat, &locationsResp)
+	if err != nil {
+		return RespShallowLocations{}, err
+	}
+
+	return locationsResp, nil
+}
diff --git a/pokeapi/pokeapi.go b/pokeapi/pokeapi.go
new file mode 100644
index 0000000..6b98b76
--- /dev/null
+++ b/pokeapi/pokeapi.go
@@ -0,0 +1,5 @@
+package pokeapi
+
+const (
+	baseURL = "https://pokeapi.co/api/v2"
+)
diff --git a/pokeapi/types_locations.go b/pokeapi/types_locations.go
new file mode 100644
index 0000000..7250410
--- /dev/null
+++ b/pokeapi/types_locations.go
@@ -0,0 +1,12 @@
+package pokeapi
+
+// RespShallowLocations -
+type RespShallowLocations struct {
+	Count    int     `json:"count"`
+	Next     *string `json:"next"`
+	Previous *string `json:"previous"`
+	Results  []struct {
+		Name string `json:"name"`
+		URL  string `json:"url"`
+	} `json:"results"`
+}