SLCORE-302 Add utility to convert a server path to an IDE path

core/src/main/java/org/sonarsource/sonarlint/core/client/api/connected/ProjectBinding.java

@@ -20,6 +20,7 @@
 package org.sonarsource.sonarlint.core.client.api.connected;
 
 import java.util.Objects;
+import java.util.Optional;
 
 /**
  * Describes the link between a project in the IDE and a project in SonarQube.
@@ -49,6 +50,21 @@ public String idePathPrefix() {
     return idePathPrefix;
   }
 
+  public Optional<String> serverPathToIdePath(String serverPath) {
+    if (!serverPath.startsWith(sqPathPrefix())) {
+      return Optional.empty();
+    }
+    int localPrefixLen = sqPathPrefix().length();
+    if (localPrefixLen > 0) {
+      localPrefixLen++;
+    }
+    String actualLocalPrefix = idePathPrefix();
+    if (!actualLocalPrefix.isEmpty()) {
+      actualLocalPrefix = actualLocalPrefix + "/";
+    }
+    return Optional.of(actualLocalPrefix + serverPath.substring(localPrefixLen));
+  }
+
   @Override
   public boolean equals(Object o) {
     if (this == o) {

core/src/test/java/org/sonarsource/sonarlint/core/client/api/connected/ProjectBindingTests.java

@@ -50,4 +50,28 @@ void equals_and_hashCode_should_use_all_fields() {
     assertThat(projectBinding1.hashCode()).isNotEqualTo(projectBinding4.hashCode());
     assertThat(projectBinding1.hashCode()).isEqualTo(projectBinding5.hashCode());
   }
+
+  @Test
+  void serverPathToIdePath_no_match_from_server_path() {
+    ProjectBinding projectBinding = new ProjectBinding("key", "sqPrefix", "localPrefix");
+    assertThat(projectBinding.serverPathToIdePath("notSqPrefix/some/path")).isEmpty();
+  }
+
+  @Test
+  void serverPathToIdePath_general_case() {
+    ProjectBinding projectBinding = new ProjectBinding("key", "sq/path/prefix", "local/prefix");
+    assertThat(projectBinding.serverPathToIdePath("sq/path/prefix/some/path")).hasValue("local/prefix/some/path");
+  }
+
+  @Test
+  void serverPathToIdePath_empty_local_path() {
+    ProjectBinding projectBinding = new ProjectBinding("key", "sq/path/prefix", "");
+    assertThat(projectBinding.serverPathToIdePath("sq/path/prefix/some/path")).hasValue("some/path");
+  }
+
+  @Test
+  void serverPathToIdePath_empty_sq_path() {
+    ProjectBinding projectBinding = new ProjectBinding("key", "", "local/prefix");
+    assertThat(projectBinding.serverPathToIdePath("some/path")).hasValue("local/prefix/some/path");
+  }
 }