feat: initial commit

Author: herculesgabriel

Dockerfile

@@ -0,0 +1,10 @@
+FROM golang:latest
+
+WORKDIR /usr/src/app
+
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
+COPY . .
+
+CMD [ "tail", "-f", "/dev/null" ]

Dockerfile.prod

@@ -0,0 +1,11 @@
+FROM golang:latest
+
+WORKDIR /usr/src/app
+
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
+COPY . .
+RUN go build -v -o /usr/local/bin/app
+
+CMD ["app"]

docker-compose.yml

@@ -0,0 +1,6 @@
+services:
+  go-app:
+    build: .
+    container_name: go-app
+    volumes:
+      - ./:/usr/src/app

go.mod

@@ -0,0 +1,5 @@
+module herculesgabriel/golang-playground
+
+go 1.20
+
+require github.com/google/uuid v1.3.0

go.sum

@@ -0,0 +1,2 @@
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

main.go

@@ -0,0 +1,171 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"herculesgabriel/golang-playground/src/jobs"
+	"herculesgabriel/golang-playground/src/schemas"
+	mail "herculesgabriel/golang-playground/src/services/mail/implementations"
+	"herculesgabriel/golang-playground/src/usecases"
+	"herculesgabriel/golang-playground/src/utils"
+)
+
+func basicLearnings() {
+	divisionResult, err := utils.Divide(0, 2)
+	if err != nil {
+		utils.Logger("Error while dividing values")
+	}
+
+	sumResult := utils.Sum(1, 2)
+	sumAllResult := utils.SumAll(1, 2, 3)
+
+	fmt.Println("0 / 2 =", divisionResult)
+	fmt.Println("1 + 2 =", sumResult)
+	fmt.Println("1 + 2 + 3 =", sumAllResult)
+}
+
+func threads() {
+	go jobs.Countdown("second countdown", 5)
+	jobs.Countdown("first countdown", 10)
+}
+
+func channels() {
+	stringChannel := make(chan string)
+
+	go func() {
+		stringChannel <- "Hello,"
+		stringChannel <- "World!"
+		stringChannel <- "-"
+	}()
+
+	var endSignal string
+	for endSignal != "-" {
+		msg := <-stringChannel
+
+		if msg == "-" {
+			endSignal = msg
+			continue
+		}
+
+		time.Sleep(time.Second)
+		fmt.Println(msg)
+	}
+}
+
+func arraysAndSlices() {
+	var array [2]int = [2]int{1, 2}
+	fmt.Println(array)
+
+	var slice []int = []int{1, 2}
+	fmt.Println(slice)
+
+	var newSlice []int = make([]int, 2)
+	fmt.Println(newSlice)
+}
+
+func maps() {
+	var activeModules map[string]bool = make(map[string]bool)
+	activeModules["finances"] = true
+	activeModules["health"] = false
+
+	emails := map[string]string{
+		"bob":  "[email protected]",
+		"kate": "[email protected]",
+	}
+
+	fmt.Println(activeModules)
+	fmt.Println(emails["bob"])
+
+	delete(emails, "kate")
+	_, exists := activeModules["kate"]
+	fmt.Println(exists)
+}
+
+func structs() {
+	someone := schemas.Person{
+		Name: "Someone",
+		Age:  27,
+		Address: schemas.Address{
+			City:    "Curitiba",
+			Country: "Brasil",
+		},
+	}
+
+	city := schemas.Address{
+		City:    "Colombo",
+		Country: "Brasil",
+	}
+
+	someoneElse := schemas.Person{
+		Name:    "Someone Else",
+		Age:     26,
+		Address: city,
+	}
+
+	supermarket := schemas.Place{
+		Name:    "Menudo",
+		Code:    1,
+		Address: city,
+	}
+
+	fmt.Println(someone)
+	fmt.Println(someoneElse)
+	fmt.Println(supermarket)
+
+	fmt.Println(supermarket.Address.City)
+	fmt.Println(supermarket.City)
+
+	fmt.Println(someone.Greeting())
+}
+
+func serializer() {
+	team := schemas.NewTeam()
+
+	team.AddPlayer("Bob")
+	team.AddPlayer("Kate")
+
+	result, _ := json.Marshal(team)
+
+	data := []byte(result)
+	var parsedTeam schemas.Team
+	json.Unmarshal(data, &parsedTeam)
+
+	fmt.Println("JSON -> " + string(result))
+	fmt.Println()
+	fmt.Print("Team -> ")
+	fmt.Println(parsedTeam)
+}
+
+func interfaces() {
+	goodMail := mail.GoodMail{}
+	sendPromoEmail := usecases.NewSendPromoEmail(goodMail)
+
+	sendPromoEmail.Execute("[email protected]")
+}
+
+func Runner(funcs ...func()) {
+	for _, fn := range funcs {
+		fn()
+		fmt.Println()
+	}
+}
+
+func main() {
+	funcs := []func(){
+		basicLearnings,
+		threads,
+		channels,
+		arraysAndSlices,
+		maps,
+		structs,
+		serializer,
+		interfaces,
+	}
+
+	Runner(funcs...)
+
+
+	
+}

src/jobs/countdown.go

@@ -0,0 +1,14 @@
+package jobs
+
+import (
+	"fmt"
+	"time"
+)
+
+func Countdown(title string, seconds int) {
+	for ; seconds > 0; seconds-- {
+		fmt.Println(title, ":", seconds)
+		time.Sleep(time.Second)
+	}
+	fmt.Println(title, ":", seconds)
+}

src/schemas/address.go

@@ -0,0 +1,6 @@
+package schemas
+
+type Address struct {
+	City    string
+	Country string
+}

src/schemas/person.go

@@ -0,0 +1,11 @@
+package schemas
+
+type Person struct {
+	Name string
+	Age  int
+	Address
+}
+
+func (p Person) Greeting() string {
+	return "Hello" + " " + p.Name
+}

src/schemas/place.go

@@ -0,0 +1,7 @@
+package schemas
+
+type Place struct {
+	Name string
+	Code int
+	Address
+}