Import forcomp handout

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+  "dotty": {
+    "trace": {
+      "remoteTracingUrl": "wss://lamppc36.epfl.ch/dotty-remote-tracer/upload/lsp.log",
+      "server": { "format": "JSON", "verbosity": "verbose" }
+    }
+  }
+}

build.sbt

@@ -0,0 +1,12 @@
+course := "progfun1"
+assignment := "forcomp"
+name := course.value + "-" + assignment.value
+testSuite := "forcomp.AnagramsSuite"
+
+scalaVersion := "0.19.0-bin-20190918-dd68eb8-NIGHTLY"
+
+scalacOptions ++= Seq("-language:implicitConversions", "-deprecation")
+
+libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test
+
+testOptions in Test += Tests.Argument(TestFrameworks.JUnit, "-a", "-v", "-s")

project/MOOCSettings.scala

@@ -0,0 +1,23 @@
+package ch.epfl.lamp
+
+import sbt._
+import sbt.Keys._
+
+/**
+  * Settings shared by all assignments, reused in various tasks.
+  */
+object MOOCSettings extends AutoPlugin {
+
+  object autoImport {
+    val course = SettingKey[String]("course")
+    val assignment = SettingKey[String]("assignment")
+    val testSuite = SettingKey[String]("testSuite")
+    val options = SettingKey[Map[String, Map[String, String]]]("options")
+  }
+
+  override def trigger = allRequirements
+
+  override val projectSettings: Seq[Def.Setting[_]] = Seq(
+    parallelExecution in Test := false
+  )
+}

project/StudentTasks.scala

@@ -0,0 +1,323 @@
+package ch.epfl.lamp
+
+import sbt._
+import Keys._
+
+// import scalaj.http._
+import java.io.{File, FileInputStream, IOException}
+import java.nio.file.FileSystems
+import org.apache.commons.codec.binary.Base64
+// import play.api.libs.json.{Json, JsObject, JsPath}
+import scala.util.{Failure, Success, Try}
+
+import MOOCSettings.autoImport._
+
+case class AssignmentInfo(
+  key: String,
+  itemId: String,
+  premiumItemId: Option[String],
+  partId: String
+)
+
+/**
+  * Provides tasks for submitting the assignment
+  */
+object StudentTasks extends AutoPlugin {
+
+  object autoImport {
+    val assignmentInfo = SettingKey[AssignmentInfo]("assignmentInfo")
+
+    val packageSourcesOnly = TaskKey[File]("packageSourcesOnly", "Package the sources of the project")
+    val packageBinWithoutResources = TaskKey[File]("packageBinWithoutResources", "Like packageBin, but without the resources")
+    val packageSubmissionZip = TaskKey[File]("packageSubmissionZip")
+    val packageSubmission = inputKey[Unit]("package solution as an archive file")
+    val runGradingTests = taskKey[Unit]("run black-box tests used for final grading")
+  }
+
+
+  import autoImport._
+
+  override lazy val projectSettings = Seq(
+    packageSubmissionSetting,
+    // submitSetting, // FIXME: restore assignmentInfo setting on assignments
+    runGradingTestsSettings,
+
+    fork := true,
+    connectInput in run := true,
+    outputStrategy := Some(StdoutOutput)
+  ) ++ packageSubmissionZipSettings
+
+  lazy val runGradingTestsSettings = runGradingTests := {
+    val testSuiteJar = "grading-tests.jar"
+    if (!new File(testSuiteJar).exists) {
+      throw new MessageOnlyException(s"Could not find tests JarFile: $testSuiteJar")
+    }
+
+    val classPath = s"${(Test / dependencyClasspath).value.map(_.data).mkString(File.pathSeparator)}${File.pathSeparator}$testSuiteJar"
+    val junitProcess =
+      Fork.java.fork(
+        ForkOptions(),
+        "-cp" :: classPath ::
+        "org.junit.runner.JUnitCore" ::
+        (Test / testSuite).value ::
+        Nil
+      )
+
+    // Wait for tests to complete.
+    junitProcess.exitValue()
+  }
+
+
+  /** **********************************************************
+    * SUBMITTING A SOLUTION TO COURSERA
+    */
+
+  val packageSubmissionZipSettings = Seq(
+    packageSubmissionZip := {
+      val submission = crossTarget.value / "submission.zip"
+      val sources = (packageSourcesOnly in Compile).value
+      val binaries = (packageBinWithoutResources in Compile).value
+      IO.zip(Seq(sources -> "sources.zip", binaries -> "binaries.jar"), submission)
+      submission
+    },
+    artifactClassifier in packageSourcesOnly := Some("sources"),
+    artifact in (Compile, packageBinWithoutResources) ~= (art => art.withName(art.name + "-without-resources"))
+  ) ++
+  inConfig(Compile)(
+    Defaults.packageTaskSettings(packageSourcesOnly, Defaults.sourceMappings) ++
+    Defaults.packageTaskSettings(packageBinWithoutResources, Def.task {
+      val relativePaths =
+        (unmanagedResources in Compile).value.flatMap(Path.relativeTo((unmanagedResourceDirectories in Compile).value)(_))
+      (mappings in (Compile, packageBin)).value.filterNot { case (_, path) => relativePaths.contains(path) }
+    })
+  )
+
+  val maxSubmitFileSize = {
+    val mb = 1024 * 1024
+    10 * mb
+  }
+
+  /** Check that the jar exists, isn't empty, isn't crazy big, and can be read
+    * If so, encode jar as base64 so we can send it to Coursera
+    */
+  def prepareJar(jar: File, s: TaskStreams): String = {
+    val errPrefix = "Error submitting assignment jar: "
+    val fileLength = jar.length()
+    if (!jar.exists()) {
+      s.log.error(errPrefix + "jar archive does not exist\n" + jar.getAbsolutePath)
+      failSubmit()
+    } else if (fileLength == 0L) {
+      s.log.error(errPrefix + "jar archive is empty\n" + jar.getAbsolutePath)
+      failSubmit()
+    } else if (fileLength > maxSubmitFileSize) {
+      s.log.error(errPrefix + "jar archive is too big. Allowed size: " +
+        maxSubmitFileSize + " bytes, found " + fileLength + " bytes.\n" +
+        jar.getAbsolutePath)
+      failSubmit()
+    } else {
+      val bytes = new Array[Byte](fileLength.toInt)
+      val sizeRead = try {
+        val is = new FileInputStream(jar)
+        val read = is.read(bytes)
+        is.close()
+        read
+      } catch {
+        case ex: IOException =>
+          s.log.error(errPrefix + "failed to read sources jar archive\n" + ex.toString)
+          failSubmit()
+      }
+      if (sizeRead != bytes.length) {
+        s.log.error(errPrefix + "failed to read the sources jar archive, size read: " + sizeRead)
+        failSubmit()
+      } else encodeBase64(bytes)
+    }
+  }
+
+  /** Task to package solution to a given file path */
+  lazy val packageSubmissionSetting = packageSubmission := {
+    val args: Seq[String] = Def.spaceDelimited("[path]").parsed
+    val s: TaskStreams = streams.value // for logging
+    val jar = (packageSubmissionZip in Compile).value
+
+    val base64Jar = prepareJar(jar, s)
+
+    val path = args.headOption.getOrElse((baseDirectory.value / "submission.jar").absolutePath)
+    scala.tools.nsc.io.File(path).writeAll(base64Jar)
+  }
+
+/*
+  /** Task to submit a solution to coursera */
+  val submit = inputKey[Unit]("submit solution to Coursera")
+  lazy val submitSetting = submit := {
+    val args: Seq[String] = Def.spaceDelimited("<arg>").parsed
+    val s: TaskStreams = streams.value // for logging
+    val jar = (packageSubmissionZip in Compile).value
+
+    val assignmentDetails = assignmentInfo.value
+    val assignmentKey = assignmentDetails.key
+    val courseName =
+      course.value match {
+        case "capstone" => "scala-capstone"
+        case "bigdata"  => "scala-spark-big-data"
+        case other      => other
+      }
+
+    val partId = assignmentDetails.partId
+    val itemId = assignmentDetails.itemId
+    val premiumItemId = assignmentDetails.premiumItemId
+
+    val (email, secret) = args match {
+      case email :: secret :: Nil =>
+        (email, secret)
+      case _ =>
+        val inputErr =
+          s"""|Invalid input to `submit`. The required syntax for `submit` is:
+              |submit <email-address> <submit-token>
+              |
+              |The submit token is NOT YOUR LOGIN PASSWORD.
+              |It can be obtained from the assignment page:
+              |https://www.coursera.org/learn/$courseName/programming/$itemId
+              |${
+                premiumItemId.fold("") { id =>
+                  s"""or (for premium learners):
+                     |https://www.coursera.org/learn/$courseName/programming/$id
+                   """.stripMargin
+                }
+              }
+          """.stripMargin
+        s.log.error(inputErr)
+        failSubmit()
+    }
+
+    val base64Jar = prepareJar(jar, s)
+    val json =
+      s"""|{
+          |   "assignmentKey":"$assignmentKey",
+          |   "submitterEmail":"$email",
+          |   "secret":"$secret",
+          |   "parts":{
+          |      "$partId":{
+          |         "output":"$base64Jar"
+          |      }
+          |   }
+          |}""".stripMargin
+
+    def postSubmission[T](data: String): Try[HttpResponse[String]] = {
+      val http = Http("https://www.coursera.org/api/onDemandProgrammingScriptSubmissions.v1")
+      val hs = List(
+        ("Cache-Control", "no-cache"),
+        ("Content-Type", "application/json")
+      )
+      s.log.info("Connecting to Coursera...")
+      val response = Try(http.postData(data)
+                         .headers(hs)
+                         .option(HttpOptions.connTimeout(10000)) // scalaj default timeout is only 100ms, changing that to 10s
+                         .asString) // kick off HTTP POST
+      response
+    }
+
+    val connectMsg =
+      s"""|Attempting to submit "${assignment.value}" assignment in "$courseName" course
+          |Using:
+          |- email: $email
+          |- submit token: $secret""".stripMargin
+    s.log.info(connectMsg)
+
+    def reportCourseraResponse(response: HttpResponse[String]): Unit = {
+      val code = response.code
+      val respBody = response.body
+
+       /* Sample JSON response from Coursera
+      {
+        "message": "Invalid email or token.",
+        "details": {
+          "learnerMessage": "Invalid email or token."
+        }
+      }
+      */
+
+      // Success, Coursera responds with 2xx HTTP status code
+      if (response.is2xx) {
+        val successfulSubmitMsg =
+          s"""|Successfully connected to Coursera. (Status $code)
+              |
+                |Assignment submitted successfully!
+              |
+                |You can see how you scored by going to:
+              |https://www.coursera.org/learn/$courseName/programming/$itemId/
+              |${
+            premiumItemId.fold("") { id =>
+              s"""or (for premium learners):
+                 |https://www.coursera.org/learn/$courseName/programming/$id
+                       """.stripMargin
+            }
+          }
+              |and clicking on "My Submission".""".stripMargin
+        s.log.info(successfulSubmitMsg)
+      }
+
+      // Failure, Coursera responds with 4xx HTTP status code (client-side failure)
+      else if (response.is4xx) {
+        val result = Try(Json.parse(respBody)).toOption
+        val learnerMsg = result match {
+          case Some(resp: JsObject) =>
+            (JsPath \ "details" \ "learnerMessage").read[String].reads(resp).get
+          case Some(x) => // shouldn't happen
+            "Could not parse Coursera's response:\n" + x
+          case None =>
+            "Could not parse Coursera's response:\n" + respBody
+        }
+        val failedSubmitMsg =
+          s"""|Submission failed.
+              |There was something wrong while attempting to submit.
+              |Coursera says:
+              |$learnerMsg (Status $code)""".stripMargin
+        s.log.error(failedSubmitMsg)
+      }
+
+      // Failure, Coursera responds with 5xx HTTP status code (server-side failure)
+      else if (response.is5xx) {
+        val failedSubmitMsg =
+          s"""|Submission failed.
+              |Coursera seems to be unavailable at the moment (Status $code)
+              |Check https://status.coursera.org/ and try again in a few minutes.
+           """.stripMargin
+        s.log.error(failedSubmitMsg)
+      }
+
+      // Failure, Coursera repsonds with an unexpected status code
+      else {
+        val failedSubmitMsg =
+          s"""|Submission failed.
+              |Coursera replied with an unexpected code (Status $code)
+           """.stripMargin
+        s.log.error(failedSubmitMsg)
+      }
+    }
+
+    // kick it all off, actually make request
+    postSubmission(json) match {
+      case Success(resp) => reportCourseraResponse(resp)
+      case Failure(e) =>
+        val failedConnectMsg =
+          s"""|Connection to Coursera failed.
+              |There was something wrong while attempting to connect to Coursera.
+              |Check your internet connection.
+              |${e.toString}""".stripMargin
+        s.log.error(failedConnectMsg)
+    }
+
+   }
+*/
+
+  def failSubmit(): Nothing = {
+    sys.error("Submission failed")
+  }
+
+  /**
+    * *****************
+    * DEALING WITH JARS
+    */
+  def encodeBase64(bytes: Array[Byte]): String =
+    new String(Base64.encodeBase64(bytes))
+}

project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.2.8

project/buildSettings.sbt

@@ -0,0 +1,8 @@
+libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test
+// Used for base64 encoding
+libraryDependencies += "commons-codec" % "commons-codec" % "1.10"
+
+// Used for Coursera submussion
+// libraryDependencies += "org.scalaj" %% "scalaj-http" % "2.3.0"
+// libraryDependencies += "com.typesafe.play" %% "play-json" % "2.6.9"
+

project/plugins.sbt

@@ -0,0 +1,2 @@
+addSbtPlugin("io.get-coursier" % "sbt-coursier" % "2.0.0-RC3-5")
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.3.4")

src/main/scala/forcomp/Anagrams.scala

@@ -0,0 +1,154 @@
+package forcomp
+
+object Anagrams extends AnagramsInterface {
+
+  /** A word is simply a `String`. */
+  type Word = String
+
+  /** A sentence is a `List` of words. */
+  type Sentence = List[Word]
+
+  /** `Occurrences` is a `List` of pairs of characters and positive integers saying
+   *  how often the character appears.
+   *  This list is sorted alphabetically w.r.t. to the character in each pair.
+   *  All characters in the occurrence list are lowercase.
+   *
+   *  Any list of pairs of lowercase characters and their frequency which is not sorted
+   *  is **not** an occurrence list.
+   *
+   *  Note: If the frequency of some character is zero, then that character should not be
+   *  in the list.
+   */
+  type Occurrences = List[(Char, Int)]
+
+  /** The dictionary is simply a sequence of words.
+   *  It is predefined and obtained as a sequence using the utility method `loadDictionary`.
+   */
+  val dictionary: List[Word] = Dictionary.loadDictionary
+
+  /** Converts the word into its character occurrence list.
+   *
+   *  Note: the uppercase and lowercase version of the character are treated as the
+   *  same character, and are represented as a lowercase character in the occurrence list.
+   *
+   *  Note: you must use `groupBy` to implement this method!
+   */
+  def wordOccurrences(w: Word): Occurrences = ???
+
+  /** Converts a sentence into its character occurrence list. */
+  def sentenceOccurrences(s: Sentence): Occurrences = ???
+
+  /** The `dictionaryByOccurrences` is a `Map` from different occurrences to a sequence of all
+   *  the words that have that occurrence count.
+   *  This map serves as an easy way to obtain all the anagrams of a word given its occurrence list.
+   *
+   *  For example, the word "eat" has the following character occurrence list:
+   *
+   *     `List(('a', 1), ('e', 1), ('t', 1))`
+   *
+   *  Incidentally, so do the words "ate" and "tea".
+   *
+   *  This means that the `dictionaryByOccurrences` map will contain an entry:
+   *
+   *    List(('a', 1), ('e', 1), ('t', 1)) -> Seq("ate", "eat", "tea")
+   *
+   */
+  lazy val dictionaryByOccurrences: Map[Occurrences, List[Word]] = ???
+
+  /** Returns all the anagrams of a given word. */
+  def wordAnagrams(word: Word): List[Word] = ???
+
+  /** Returns the list of all subsets of the occurrence list.
+   *  This includes the occurrence itself, i.e. `List(('k', 1), ('o', 1))`
+   *  is a subset of `List(('k', 1), ('o', 1))`.
+   *  It also include the empty subset `List()`.
+   *
+   *  Example: the subsets of the occurrence list `List(('a', 2), ('b', 2))` are:
+   *
+   *    List(
+   *      List(),
+   *      List(('a', 1)),
+   *      List(('a', 2)),
+   *      List(('b', 1)),
+   *      List(('a', 1), ('b', 1)),
+   *      List(('a', 2), ('b', 1)),
+   *      List(('b', 2)),
+   *      List(('a', 1), ('b', 2)),
+   *      List(('a', 2), ('b', 2))
+   *    )
+   *
+   *  Note that the order of the occurrence list subsets does not matter -- the subsets
+   *  in the example above could have been displayed in some other order.
+   */
+  def combinations(occurrences: Occurrences): List[Occurrences] = ???
+
+  /** Subtracts occurrence list `y` from occurrence list `x`.
+   *
+   *  The precondition is that the occurrence list `y` is a subset of
+   *  the occurrence list `x` -- any character appearing in `y` must
+   *  appear in `x`, and its frequency in `y` must be smaller or equal
+   *  than its frequency in `x`.
+   *
+   *  Note: the resulting value is an occurrence - meaning it is sorted
+   *  and has no zero-entries.
+   */
+  def subtract(x: Occurrences, y: Occurrences): Occurrences = ???
+
+  /** Returns a list of all anagram sentences of the given sentence.
+   *
+   *  An anagram of a sentence is formed by taking the occurrences of all the characters of
+   *  all the words in the sentence, and producing all possible combinations of words with those characters,
+   *  such that the words have to be from the dictionary.
+   *
+   *  The number of words in the sentence and its anagrams does not have to correspond.
+   *  For example, the sentence `List("I", "love", "you")` is an anagram of the sentence `List("You", "olive")`.
+   *
+   *  Also, two sentences with the same words but in a different order are considered two different anagrams.
+   *  For example, sentences `List("You", "olive")` and `List("olive", "you")` are different anagrams of
+   *  `List("I", "love", "you")`.
+   *
+   *  Here is a full example of a sentence `List("Yes", "man")` and its anagrams for our dictionary:
+   *
+   *    List(
+   *      List(en, as, my),
+   *      List(en, my, as),
+   *      List(man, yes),
+   *      List(men, say),
+   *      List(as, en, my),
+   *      List(as, my, en),
+   *      List(sane, my),
+   *      List(Sean, my),
+   *      List(my, en, as),
+   *      List(my, as, en),
+   *      List(my, sane),
+   *      List(my, Sean),
+   *      List(say, men),
+   *      List(yes, man)
+   *    )
+   *
+   *  The different sentences do not have to be output in the order shown above - any order is fine as long as
+   *  all the anagrams are there. Every returned word has to exist in the dictionary.
+   *
+   *  Note: in case that the words of the sentence are in the dictionary, then the sentence is the anagram of itself,
+   *  so it has to be returned in this list.
+   *
+   *  Note: There is only one anagram of an empty sentence.
+   */
+  def sentenceAnagrams(sentence: Sentence): List[Sentence] = ???
+}
+
+object Dictionary {
+  def loadDictionary: List[String] =
+    val wordstream = Option {
+      getClass.getResourceAsStream(List("forcomp", "linuxwords.txt").mkString("/", "/", ""))
+    } getOrElse(sys.error("Could not load word list, dictionary file not found"))
+    try
+      val s = scala.io.Source.fromInputStream(wordstream)
+      s.getLines.toList
+    catch
+      case e: Exception =>
+        println("Could not load word list: " + e)
+        throw e
+    finally
+      wordstream.close()
+}

src/main/scala/forcomp/AnagramsInterface.scala

@@ -0,0 +1,15 @@
+package forcomp
+
+/**
+ * The interface used by the grading infrastructure. Do not change signatures
+ * or your submission will fail with a NoSuchMethodError.
+ */
+trait AnagramsInterface {
+  def wordOccurrences(w: String): List[(Char, Int)]
+  def sentenceOccurrences(s: List[String]): List[(Char, Int)]
+  def dictionaryByOccurrences: Map[List[(Char, Int)], List[String]]
+  def wordAnagrams(word: String): List[String]
+  def combinations(occurrences: List[(Char, Int)]): List[List[(Char, Int)]]
+  def subtract(x: List[(Char, Int)], y: List[(Char, Int)]): List[(Char, Int)]
+  def sentenceAnagrams(sentence: List[String]): List[List[String]]
+}

src/test/scala/forcomp/AnagramsSuite.scala

@@ -0,0 +1,91 @@
+package forcomp
+
+import org.junit._
+import org.junit.Assert.assertEquals
+
+
+class AnagramsSuite {
+  import Anagrams._
+
+  @Test def `wordOccurrences: abcd (3pts)`: Unit =
+    assertEquals(List(('a', 1), ('b', 1), ('c', 1), ('d', 1)), wordOccurrences("abcd"))
+
+  @Test def `wordOccurrences: Robert (3pts)`: Unit =
+    assertEquals(List(('b', 1), ('e', 1), ('o', 1), ('r', 2), ('t', 1)), wordOccurrences("Robert"))
+
+
+  @Test def `sentenceOccurrences: abcd e (5pts)`: Unit =
+    assertEquals(List(('a', 1), ('b', 1), ('c', 1), ('d', 1), ('e', 1)), sentenceOccurrences(List("abcd", "e")))
+
+
+  @Test def `dictionaryByOccurrences.get: eat (10pts)`: Unit =
+    assertEquals(Some(Set("ate", "eat", "tea")), dictionaryByOccurrences.get(List(('a', 1), ('e', 1), ('t', 1))).map(_.toSet))
+
+
+  @Test def `wordAnagrams married (2pts)`: Unit =
+    assertEquals(Set("married", "admirer"), wordAnagrams("married").toSet)
+
+  @Test def `wordAnagrams player (2pts)`: Unit =
+    assertEquals(Set("parley", "pearly", "player", "replay"), wordAnagrams("player").toSet)
+
+
+
+  @Test def `subtract: lard - r (10pts)`: Unit =
+    val lard = List(('a', 1), ('d', 1), ('l', 1), ('r', 1))
+    val r = List(('r', 1))
+    val lad = List(('a', 1), ('d', 1), ('l', 1))
+    assertEquals(lad, subtract(lard, r))
+
+
+  @Test def `combinations: [] (8pts)`: Unit =
+    assertEquals(List(Nil), combinations(Nil))
+
+  @Test def `combinations: abba (8pts)`: Unit =
+    val abba = List(('a', 2), ('b', 2))
+    val abbacomb = List(
+      List(),
+      List(('a', 1)),
+      List(('a', 2)),
+      List(('b', 1)),
+      List(('a', 1), ('b', 1)),
+      List(('a', 2), ('b', 1)),
+      List(('b', 2)),
+      List(('a', 1), ('b', 2)),
+      List(('a', 2), ('b', 2))
+    )
+    assertEquals(abbacomb.toSet, combinations(abba).toSet)
+
+
+  @Test def `sentence anagrams: [] (10pts)`: Unit =
+    val sentence = List()
+    assertEquals(List(Nil), sentenceAnagrams(sentence))
+
+  @Test def `sentence anagrams: Linux rulez (10pts)`: Unit =
+    val sentence = List("Linux", "rulez")
+    val anas = List(
+      List("Rex", "Lin", "Zulu"),
+      List("nil", "Zulu", "Rex"),
+      List("Rex", "nil", "Zulu"),
+      List("Zulu", "Rex", "Lin"),
+      List("null", "Uzi", "Rex"),
+      List("Rex", "Zulu", "Lin"),
+      List("Uzi", "null", "Rex"),
+      List("Rex", "null", "Uzi"),
+      List("null", "Rex", "Uzi"),
+      List("Lin", "Rex", "Zulu"),
+      List("nil", "Rex", "Zulu"),
+      List("Rex", "Uzi", "null"),
+      List("Rex", "Zulu", "nil"),
+      List("Zulu", "Rex", "nil"),
+      List("Zulu", "Lin", "Rex"),
+      List("Lin", "Zulu", "Rex"),
+      List("Uzi", "Rex", "null"),
+      List("Zulu", "nil", "Rex"),
+      List("rulez", "Linux"),
+      List("Linux", "rulez")
+    )
+    assertEquals(anas.toSet, sentenceAnagrams(sentence).toSet)
+
+
+  @Rule def individualTestTimeout = new org.junit.rules.Timeout(10 * 1000)
+}

student.sbt

@@ -0,0 +1,9 @@
+// Used for base64 encoding
+libraryDependencies += "commons-codec" % "commons-codec" % "1.10"
+
+// Used for Coursera submussion
+// libraryDependencies += "org.scalaj" %% "scalaj-http" % "2.4.2"
+// libraryDependencies += "com.typesafe.play" %% "play-json" % "2.7.4"
+
+// Student tasks (i.e. packageSubmission)
+enablePlugins(StudentTasks)