1 files changed, 115 insertions, 0 deletions
diff --git a/scalding/src/main/scala/sandcrawler/Scorable.scala b/scalding/src/main/scala/sandcrawler/Scorable.scala
new file mode 100644
index 0000000..8e0c560
--- /dev/null
+++ b/scalding/src/main/scala/sandcrawler/Scorable.scala
@@ -0,0 +1,115 @@
+import scala.math
+import scala.util.parsing.json.JSON
+
+import com.twitter.scalding._
+import com.twitter.scalding.typed.TDsl._
+
+case class MapFeatures(val key : String, slug : String, json : String)
+case class ReduceFeatures(json : String)
+case class ReduceOutput(val score : Int, json1 : String, json2 : String)
+
+abstract class Scorable {
+  def getInputPipe(args : Args) : TypedPipe[(String, ReduceFeatures)] =
+  {
+    getFeaturesPipe(args)
+      .filter { entry => Scorable.isValidSlug(entry.slug) }
+      .groupBy { case MapFeatures(key, slug, json) => slug }
+      .map { tuple =>
+        val (slug : String, features : MapFeatures) = tuple
+        (slug, ReduceFeatures(features.json))
+      }
+  }
+
+  // abstract method
+  def getFeaturesPipe(args : Args) : TypedPipe[MapFeatures]
+}
+
+object Scorable {
+  val NoSlug = "NO SLUG" // Used for slug if title is empty or unparseable
+
+  def isValidSlug(slug : String) = {
+    slug != NoSlug
+  }
+
+  def jsonToMap(json : String) : Option[Map[String, Any]] = {
+    // https://stackoverflow.com/a/32717262/631051
+    val jsonObject = JSON.parseFull(json)
+    if (jsonObject == None) {
+      None
+    } else {
+      Some(jsonObject.get.asInstanceOf[Map[String, Any]])
+    }
+  }
+
+  /*
+  def grobidToSlug(json : String) : Option[String] = {
+    jsonToMap(json) match {
+      case None => None
+      case Some(map) => {
+        if (map contains "title") {
+          titleToSlug(getString(map, "title"))
+        } else {
+          None
+        }
+      }
+    }
+  }
+
+  def crossrefToSlug(json : String) : Option[String] = {
+    jsonToMap(json) match {
+      case None => None
+      case Some(map) => {
+        if (map contains "title") {
+          // TODO: Stop ignoring secondary titles
+          titleToSlug(map("title").asInstanceOf[List[String]](0))
+        } else {
+          None
+        }
+      }
+    }
+  }
+   */
+
+  def titleToSlug(title : String) : String = {
+    val slug = StringUtilities.removeAccents(title).split(":")(0).toLowerCase()
+    if (slug.isEmpty) {
+      NoSlug
+    } else {
+      slug
+    }
+  }
+
+  def getStringOption(optionalMap : Option[Map[String, Any]], key : String) 
+      : Option[String] = {
+    optionalMap match {
+      case None => None
+      case Some(map) => if (map contains key) Some(map(key).asInstanceOf[String]) else None
+    }
+  }
+
+  // Caller is responsible for ensuring that key is in map.
+  def getString(map : Map[String, String], key : String) : String = {
+    assert(map contains key)
+    map(key).asInstanceOf[String]
+  }
+
+  val MaxScore = 1000
+
+  def computeOutput(feature1 : ReduceFeatures, feature2 : ReduceFeatures) :
+      ReduceOutput = {
+    val json1 = jsonToMap(feature1.json)
+    val json2 = jsonToMap(feature2.json)
+    getStringOption(json1, "title") match {
+      case None => ReduceOutput(0, "No title", feature1.json)
+      case Some(title1) => {
+        getStringOption(json2, "title") match {
+          case None => ReduceOutput(0, "No title", feature2.json)
+          case Some(title2) => 
+            ReduceOutput(
+              (StringUtilities.similarity(title1, title2) * MaxScore).toInt,
+              feature1.json, feature2.json)
+        }
+      }
+    }
+  }
+}