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sergeykamov pushed a commit to branch NLPCRAFT-477
in repository https://gitbox.apache.org/repos/asf/incubator-nlpcraft.git
The following commit(s) were added to refs/heads/NLPCRAFT-477 by this push:
new 3657b80 NCIntentSolver initial version added.
3657b80 is described below
commit 3657b806ab4df5488b3f71cb22755821b025f3ab
Author: Sergey Kamov <skhdlem...@gmail.com>
AuthorDate: Thu Feb 17 13:32:38 2022 +0300
NCIntentSolver initial version added.
---
.../internal/intent/matcher/NCIntentSolver.scala | 125 +++++++++++++++++++++
1 file changed, 125 insertions(+)
diff --git
a/nlpcraft/src/main/scala/org/apache/nlpcraft/internal/intent/matcher/NCIntentSolver.scala
b/nlpcraft/src/main/scala/org/apache/nlpcraft/internal/intent/matcher/NCIntentSolver.scala
new file mode 100644
index 0000000..4f17322
--- /dev/null
+++
b/nlpcraft/src/main/scala/org/apache/nlpcraft/internal/intent/matcher/NCIntentSolver.scala
@@ -0,0 +1,125 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.nlpcraft.internal.intent.matcher
+
+import com.typesafe.scalalogging.LazyLogging
+import org.apache.nlpcraft.*
+import org.apache.nlpcraft.internal.dialogflow.NCDialogFlowManager
+import org.apache.nlpcraft.internal.intent.NCIDLIntent
+
+import java.util.{Collections, List as JList}
+import scala.collection.mutable
+import scala.jdk.CollectionConverters.*
+
+/**
+ * Front-end for intent solver.
+ */
+class NCIntentSolver(
+ engine: NCIntentSolverEngine,
+ dialog: NCDialogFlowManager,
+ // TODO: order.
+ // TODO: NCIntentSolverInput contains model.
+ // TODO: logic with RedoSolver.
+ // TODO: NCIntentMatcher API.
+ // TODO: why 2 classes NCIntentSolver and NCIntentSolverEngine.
+ intents: Map[NCIDLIntent, NCIntentMatch => NCResult]
+) extends LazyLogging:
+ /**
+ *
+ * @param in
+ * @param span
+ * @return
+ */
+ def solve(in: NCIntentSolverInput): NCResult =
+ var res: NCResult = null
+
+ while (res != null)
+ solve0(in) match
+ case Some(solverRes) => res = solverRes
+ case None => // No-op.
+
+ res
+
+ /**
+ *
+ * @param in Intent solver input.
+ * @param span Parent span.
+ * @return
+ * @throws NCRejection
+ */
+ private def solve0(in: NCIntentSolverInput): Option[NCResult] =
+ // Should it be an assertion?
+ if intents.isEmpty then throw new NCRejection("Intent solver has no
registered intents.")
+
+ val ctx = in.context
+ val req = ctx.getRequest
+
+ val results =
+ try engine.solve(ctx, intents)
+ catch case e: Exception => throw new NCRejection("Processing
failed due to unexpected error.", e)
+
+ if results.isEmpty then throw new NCRejection("No matching intent
found.")
+
+ var i = -1
+
+ for (res <- results if res != null)
+ try
+ i += 1
+
+ val intentMatch: NCIntentMatch =
+ new NCIntentMatch:
+ override val getIntentId: String = res.intentId
+ override val getIntentEntities: JList[JList[NCEntity]]
= res.groups.map(_.entities).map(_.asJava).asJava
+ override def getTermEntities(idx: Int):
JList[NCEntity] = res.groups(idx).entities.asJava
+ override def getTermEntities(termId: String):
JList[NCEntity] =
+ res.groups.find(_.termId === termId) match
+ case Some(g) => g.entities.asJava
+ case None => Collections.emptyList()
+ override val getVariant: NCVariant =
+ new NCVariant:
+ override def getEntities: JList[NCEntity] =
res.variant.entities.asJava
+
+ if !in.model.onMatchedIntent(intentMatch) then
+ logger.info(
+ s"Model '${ctx.getModelConfig.getId}' triggered
rematching of intents by intent '${res.intentId}' on variant #${res.variantIdx
+ 1}."
+ )
+
+ return None
+
+ // This can throw NCIntentSkip exception.
+ val cbRes = res.fn(intentMatch)
+
+ // Store won intent match in the input.
+ in.intentMatch = intentMatch
+
+ if cbRes.getIntentId == null then
+ cbRes.setIntentId(res.intentId)
+
+ logger.info(s"Intent '${res.intentId}' for variant
#${res.variantIdx + 1} selected as the <|best match|>")
+
+ dialog.addMatchedIntent(intentMatch, cbRes, ctx)
+
+ return Option(cbRes)
+ catch
+ case e: NCIntentSkip =>
+ // No-op - just skipping this result.
+ e.getMessage match
+ case s if s != null => logger.info(s"Selected intent
'${res.intentId}' skipped: $s")
+ case _ => logger.info(s"Selected intent
'${res.intentId}' skipped.")
+
+ throw new NCRejection("No matching intent found - all intents were
skipped.")
