Added /books route

README.md

@@ -1,5 +1,9 @@
 # SnorriScalason
 
-ScalaBridge Project - mentored by Noel Welsh
+ScalaBridge Project - mentored by Zainab Ali & Noel Welsh
 
 
+Tasks:
+ - Update krop to the latest version
+ - Change the way krop handles JSON
+ - Read and serve the JSON

backend/resources/book.json

@@ -0,0 +1,52 @@
+[
+    {
+      "id" : "978-0641723445",
+      "cat" : ["book","hardcover"],
+      "name" : "The Lightning Thief",
+      "author" : "Rick Riordan",
+      "series_t" : "Percy Jackson and the Olympians",
+      "sequence_i" : 1,
+      "genre_s" : "fantasy",
+      "inStock" : true,
+      "price" : 12.50,
+      "pages_i" : 384
+    }
+  ,
+    {
+      "id" : "978-1423103349",
+      "cat" : ["book","paperback"],
+      "name" : "The Sea of Monsters",
+      "author" : "Rick Riordan",
+      "series_t" : "Percy Jackson and the Olympians",
+      "sequence_i" : 2,
+      "genre_s" : "fantasy",
+      "inStock" : true,
+      "price" : 6.49,
+      "pages_i" : 304
+    }
+  ,
+    {
+      "id" : "978-1857995879",
+      "cat" : ["book","paperback"],
+      "name" : "Sophie's World : The Greek Philosophers",
+      "author" : "Jostein Gaarder",
+      "sequence_i" : 1,
+      "genre_s" : "fantasy",
+      "inStock" : true,
+      "price" : 3.07,
+      "pages_i" : 64
+    }
+  ,
+    {
+      "id" : "978-1933988177",
+      "cat" : ["book","paperback"],
+      "name" : "Lucene in Action, Second Edition",
+      "author" : "Michael McCandless",
+      "sequence_i" : 1,
+      "genre_s" : "IT",
+      "inStock" : true,
+      "price" : 30.50,
+      "pages_i" : 475
+    }
+]
+

backend/src/main/resources/book.json

@@ -0,0 +1,60 @@
+[
+  {
+    "id": "978-0641723445",
+    "name": "The Lightning Thief",
+    "author": "Rick Riordan",
+    "price": 12.50,
+    "pages": 384,
+    "genres": "fantasy",
+    "inStock": true,
+    "series_t": "Percy Jackson and the Olympians",
+    "sequence_i": 1,
+    "cat": [
+      "book",
+      "hardcover"
+    ]
+  },
+  {
+    "id": "978-1423103349",
+    "name": "The Sea of Monsters",
+    "author": "Rick Riordan",
+    "price": 6.49,
+    "pages": 304,
+    "genres": "fantasy",
+    "inStock": true,
+    "series_t": "Percy Jackson and the Olympians",
+    "sequence_i": 2,
+    "cat": [
+      "book",
+      "paperback"
+    ]
+  },
+  {
+    "id": "978-1857995879",
+    "name": "Sophie's World : The Greek Philosophers",
+    "author": "Jostein Gaarder",
+    "price": 3.07,
+    "pages": 64,
+    "genres": "fantasy",
+    "inStock": true,
+    "sequence_i": 1,
+    "cat": [
+      "book",
+      "paperback"
+    ]
+  },
+  {
+    "id": "978-1933988177",
+    "name": "Lucene in Action, Second Edition",
+    "author": "Michael McCandless",
+    "price": 30.50,
+    "pages": 475,
+    "genres": "IT",
+    "inStock": true,
+    "sequence_i": 1,
+    "cat": [
+      "book",
+      "paperback"
+    ]
+  }
+]

backend/src/main/scala/snorri/Book.scala

@@ -0,0 +1,19 @@
+package snorri
+
+import io.circe.{Encoder, Decoder}
+import io.circe.generic.semiauto._
+
+// NOTE: Not yet reading series_t,sequence_i and cat
+case class Book(
+  id: String,
+  name: String,
+  author: String,
+  genres: String,
+  inStock: Boolean,
+  price: Double,
+  pages: Int
+)
+
+object Book:
+  implicit val bookEncoder: Encoder[Book] = deriveEncoder[Book]
+  implicit val bookDecoder: Decoder[Book] = deriveDecoder[Book]

backend/src/main/scala/snorri/Server.scala

@@ -1,9 +1,13 @@
 package snorri
 
 import krop.all.*
+import krop.all.given
 
 object Server {
-  val app: Application = Snorri.route.otherwise(Application.notFound)
+  private val app: Application =
+    Snorri.getBooksRoute
+      .orElse(Snorri.echoRoute)
+      .orElse(Application.notFound)
 
   @main def go(): Unit =
     ServerBuilder.default.withApplication(app).run()

backend/src/main/scala/snorri/Snorri.scala

@@ -1,11 +1,49 @@
 package snorri
 
+import cats.effect.IO
+import io.circe.parser.decode
+import io.circe.syntax.*
+import io.circe.{Encoder, Json}
 import krop.all.*
+import krop.route.InvariantEntity
+import org.http4s.circe.{CirceEntityDecoder, CirceEntityEncoder}
+
+import scala.io.{BufferedSource, Source}
 
 object Snorri {
-  val route =
+  private val jsonEntity: InvariantEntity[Json] =
+    Entity(
+      CirceEntityDecoder.circeEntityDecoder,
+      CirceEntityEncoder.circeEntityEncoder
+    )
+
+  val echoRoute =
     Route(
       Request.get(Path.root / "echo" / Param.string),
-      Response.ok[String]
-    ).handle(param => s"Your message was ${param}")
+      Response.ok(Entity.text)
+    ).handle(param => s"Your message was $param")
+
+  val getBooksRoute =
+    Route(
+      Request.get(Path.root / "books"),
+      Response.ok(jsonEntity)
+    ).handle(() => loadBooks().asJson)
+
+  private def loadBooks(): List[Book] =
+    decode[List[Book]](retrieveBooks()) match {
+      case Right(books) => books
+      case Left(err) =>
+        err.fillInStackTrace().printStackTrace()
+        throw err.getCause
+    }
+
+  private def retrieveBooks(): String =
+    use(booksResource()) { src =>
+      src.mkString
+    }
+
+  private def booksResource(): BufferedSource = {
+    val stream = getClass.getResourceAsStream("/book.json")
+    Source.fromInputStream(stream)
+  }
 }

backend/src/main/scala/snorri/package.scala

@@ -0,0 +1,7 @@
+package object snorri:
+  // A lame try-with-resources equivalent
+  def use[A <: AutoCloseable, B](resource: A)(code: A => B): B =
+    try
+      code(resource)
+    finally
+      resource.close()

build.sbt

@@ -5,7 +5,10 @@ ThisBuild / tlBaseVersion   := "0.1"
 ThisBuild / tlCiHeaderCheck := false
 
 val commonSettings = Seq(
-  libraryDependencies += "org.creativescala" %% "krop-core" % "0.4.1"
+  libraryDependencies ++=
+    "org.creativescala" %% "krop-core" % "0.6.0" ::
+      Modules.circe :::
+      Nil
 )
 
 lazy val snorriRoot =

project/Modules.scala

@@ -0,0 +1,10 @@
+import sbt.*
+
+object Modules {
+  val CirceVersion = "0.14.6"
+
+  lazy val circe: List[ModuleID] =
+    "io.circe"   %% "circe-parser"  % CirceVersion ::
+      "io.circe" %% "circe-generic" % CirceVersion ::
+      Nil
+}