part one of the app

README.md

@@ -1,3 +1,16 @@
 # go-cli-course
 
 Full golang course with a CLI project development
+
+## Project
+
+- Booking App
+- Stopped at 1:56:05 - https://youtu.be/yyUHQIec83I?si=62O0tlgcHmQBku9f&t=6965
+
+## Setup
+
+### Install Go
+
+### VS Code Extensions
+
+- Go - Go Team at Google

booking-app/go.mod

@@ -0,0 +1,3 @@
+module booking-app
+
+go 1.26.5

booking-app/main.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+  "fmt"
+  "strings"
+)
+
+func main() {
+  conferenceName := "Go Conference"
+  const conferenceTickets int = 50
+  var remainingTickets uint = 50
+
+  fmt.Printf("Welcome to %v booking application\n", conferenceName)
+  fmt.Printf("We have total of %v tickets and %v are still available.\n", conferenceTickets, remainingTickets)
+  fmt.Println("Get your tickets here to attend")
+
+  bookings := []string{}
+
+  for remainingTickets > 0 && len(bookings) < 50 {
+    var firstName string
+    var lastName string
+    var email string
+    var userTickets uint
+    
+    // ask user for their name
+    fmt.Printf("- Enter your first name: ")
+    fmt.Scan(&firstName)
+
+    // ask user for their last name
+    fmt.Printf("- Enter your last name: ")
+    fmt.Scan(&lastName)
+
+    // ask user for their email
+    fmt.Printf("- Enter your email address: ")
+    fmt.Scan(&email)
+
+    // ask user for the number of tickets
+    fmt.Printf("- How many tickets to you want to book: ")
+    fmt.Scan(&userTickets)
+
+    // validations
+    isValidName := len(firstName) >= 2 && len(lastName) >= 2
+    isValidEmail := strings.Contains(email, "@")
+    isValidNumber := userTickets > 0 && userTickets <= remainingTickets
+
+    if isValidName && isValidEmail && isValidNumber {
+      // array-fashion: bookings[0] = firstName + " " + lastName
+      bookings = append(bookings, firstName + " " + lastName)
+      remainingTickets = remainingTickets - userTickets
+
+      // Thank you message
+      fmt.Printf("Thank you %v %v for booking %v tickets. You will receive a confirmation email at %v\n", firstName, lastName, userTickets, email)
+      fmt.Printf("%v ticket remaining for %v\n", remainingTickets, conferenceName)
+
+      firstNames := []string{}
+      for _, firstAndLastName := range bookings {
+        var names = strings.Fields(firstAndLastName)
+        firstNames = append(firstNames, names[0])
+      }
+      fmt.Printf("These are all the first names of our bookings: %v\n", firstNames)
+
+      if remainingTickets == 0 {
+        // end program
+        fmt.Println("Out conference is booked out. Come back next year.")
+        break
+      }
+    } else {
+      if !isValidName {
+        fmt.Printf("!! Oops: first name and last name must be at least size 2\n")
+      }
+      if !isValidEmail {
+        fmt.Printf("!! Oops: email must be a valid email\n")
+      }
+      if !isValidNumber {
+        fmt.Printf("!! Oops: number of tickets should be valid and less or equals %v\n", remainingTickets)
+      }
+    }
+  }
+}
+