feat: loading data from api on start

16-countries-page-from-api/build.sbt

@@ -6,10 +6,10 @@ val toolkitTest = "org.scala-lang" %% "toolkit-test" % toolkitV
 
 val cask = "com.lihaoyi" %% "cask" % "0.9.1"
 val mainargs = "com.lihaoyi" %% "mainargs" % "0.5.4"
+val requests = "com.lihaoyi" %% "requests" % "0.8.0"
 
 ThisBuild / scalaVersion := "3.2.2"
-libraryDependencies += cask
-libraryDependencies += mainargs
+libraryDependencies ++= Seq(cask, mainargs, requests)
 libraryDependencies += toolkit
 libraryDependencies += (toolkitTest % Test)
 

16-countries-page-from-api/src/main/scala/example/Main.scala

@@ -5,20 +5,27 @@ import org.thymeleaf.TemplateEngine
 import org.thymeleaf.context.Context
 import cask.model.Response
 import mainargs.{main, arg, ParserForMethods, Flag}
+import scala.util.Try
 
-object MinimalApplication extends cask.Routes{
+object MinimalApplication extends cask.Routes {
 
   @main
   def run(
-    @arg(name="port", short='p', doc="Port on which server will start service")
+      @arg(
+        name = "port",
+        short = 'p',
+        doc = "Port on which server will start service"
+      )
       portArg: Int = 8080,
-    @arg(name="host", doc="Host on which server will start serving")
+      @arg(name = "host", doc = "Host on which server will start serving")
       hostArg: String = "localhost"
   ) = {
     println(s"Will start server on ${hostArg}:${portArg}")
     val countriesDb = loadCountries()
     val server = new cask.Main {
-      override def allRoutes: Seq[cask.main.Routes] = Seq(Routes(countries = countriesDb ))
+      override def allRoutes: Seq[cask.main.Routes] = Seq(
+        Routes(countries = countriesDb)
+      )
       override def port: Int = portArg
       override def host: String = hostArg
     }
@@ -26,14 +33,23 @@ object MinimalApplication extends cask.Routes{
   }
 
   def loadCountries() = {
-    val countries: List[Country] = upickle.default.read[List[Country]](
+    val defaultCountriesData: List[Country] =
+      upickle.default.read[List[Country]](
         scala.io.Source.fromResource("temporary/all.json").getLines().mkString,
         true
       )
-    countries
+    val apiDataRequest = requests.get("https://restcountries.com/v3.1/all")
+    val apiData = Try(
+      upickle.default.read[List[Country]](apiDataRequest.text(), true)
+    )
+    if (apiData.isFailure)
+      println(s"> data load failed ${apiData}")
+    else
+      println(s"> api data load is successful")
+
+    apiData.toOption.getOrElse(defaultCountriesData)
   }
 
   def main(args: Array[String]): Unit = ParserForMethods(this).runOrExit(args)
 
-
 }