Fix #3972: Added TextViewStyleCheck script

scripts/BUILD.bazel

@@ -312,3 +312,10 @@ java_binary(
     main_class = "org.oppia.android.scripts.telemetry.DecodeUserStudyEventStringKt",
     runtime_deps = ["//scripts/src/java/org/oppia/android/scripts/telemetry:decode_user_study_event_string_lib"],
 )
+
+kt_jvm_binary(
+    name = "check_textview_styles",
+    testonly = True,
+    main_class = "org.oppia.android.scripts.xml.TextViewStyleCheckKt",
+    runtime_deps = ["//scripts/src/java/org/oppia/android/scripts/xml:check_textview_styles"],
+)

scripts/src/java/org/oppia/android/scripts/xml/BUILD.bazel

@@ -52,3 +52,14 @@ kt_jvm_library(
         "//scripts/src/java/org/oppia/android/scripts/common:repository_file",
     ],
 )
+
+kt_jvm_library(
+    name = "check_textview_styles",
+    testonly = True,
+    srcs = ["TextViewStyleCheck.kt"],
+    visibility = ["//scripts:oppia_script_binary_visibility"],
+    deps = [
+        ":xml_syntax_error_handler",
+        "//scripts/src/java/org/oppia/android/scripts/common:repository_file",
+    ],
+)

scripts/src/java/org/oppia/android/scripts/xml/TextViewStyleCheck.kt

@@ -0,0 +1,62 @@
+package org.oppia.android.scripts.xml
+
+import java.io.File
+import javax.xml.parsers.DocumentBuilderFactory
+
+/**
+ * Script to ensure all TextView elements in layout XML files use centrally managed styles.
+ *
+ * Usage:
+ *   bazel run //scripts:check_textview_styles -- <path_to_repository_root>
+ *
+ * Arguments:
+ * - path_to_repository_root: The root path of the repository.
+ *
+ * Example:
+ *   bazel run //scripts:check_textview_styles -- $(pwd)
+ */
+fun main(vararg args: String) {
+  require(args.isNotEmpty()) {
+    "Usage: bazel run" +
+      " //scripts:check_textview_styles -- <path_to_repository_root>"
+  }
+
+  val repoRoot = File(args[0])
+  require(repoRoot.exists()) { "Repository root path does not exist: ${args[0]}" }
+
+  val resDir = File(repoRoot, "app/src/main/res")
+  require(resDir.exists()) { "Resource directory does not exist: ${resDir.path}" }
+
+  val layoutDirs = resDir.listFiles { file -> file.isDirectory && file.name.startsWith("layout") }
+    ?: emptyArray()
+  val xmlFiles = layoutDirs.flatMap { dir ->
+    dir.walkTopDown().filter { file -> file.extension == "xml" }.toList()
+  }
+
+  val builderFactory = DocumentBuilderFactory.newInstance()
+  val errors = mutableListOf<String>()
+
+  for (file in xmlFiles) {
+    val document = builderFactory.newDocumentBuilder().parse(file)
+    val textViewNodes = document.getElementsByTagName("TextView")
+
+    for (i in 0 until textViewNodes.length) {
+      val node = textViewNodes.item(i)
+      val attributes = node.attributes
+      val styleAttribute = attributes?.getNamedItem("style")?.nodeValue
+
+      if (styleAttribute == null || !styleAttribute.startsWith("@style/")) {
+        errors.add("${file.path}: TextView element is missing a centrally managed style.")
+        break
+      }
+    }
+  }
+
+  if (errors.isNotEmpty()) {
+    println("TextView Style Check FAILED:")
+    errors.forEach { println(it) }
+    throw Exception("Some TextView elements do not have centrally managed styles.")
+  } else {
+    println("TextView Style Check PASSED.")
+  }
+}