Rewrite ExceptionUtils methods as extension functions.

app/src/main/java/org/schabi/newpipe/ktx/Throwable.kt

@@ -0,0 +1,65 @@
+@file:JvmName("ExceptionUtils")
+
+package org.schabi.newpipe.ktx
+
+import java.io.IOException
+import java.io.InterruptedIOException
+
+/**
+ * @return if throwable is related to Interrupted exceptions, or one of its causes is.
+ */
+val Throwable.isInterruptedCaused: Boolean
+    get() = hasExactCause(InterruptedIOException::class.java, InterruptedException::class.java)
+
+/**
+ * @return if throwable is related to network issues, or one of its causes is.
+ */
+val Throwable.isNetworkRelated: Boolean
+    get() = hasAssignableCause(IOException::class.java)
+
+/**
+ * Calls [hasCause] with the `checkSubtypes` parameter set to false.
+ */
+fun Throwable.hasExactCause(vararg causesToCheck: Class<*>) = hasCause(false, *causesToCheck)
+
+/**
+ * Calls [hasCause] with the `checkSubtypes` parameter set to true.
+ */
+fun Throwable?.hasAssignableCause(vararg causesToCheck: Class<*>) = hasCause(true, *causesToCheck)
+
+/**
+ * Check if the throwable has some cause from the causes to check, or is itself in it.
+ *
+ * If `checkIfAssignable` is true, not only the exact type will be considered equals, but also its subtypes.
+ *
+ * @param checkSubtypes if subtypes are also checked.
+ * @param causesToCheck an array of causes to check.
+ *
+ * @see Class.isAssignableFrom
+ */
+tailrec fun Throwable?.hasCause(checkSubtypes: Boolean, vararg causesToCheck: Class<*>): Boolean {
+    if (this == null) {
+        return false
+    }
+
+    // Check if throwable is a subtype of any of the causes to check
+    causesToCheck.forEach { causeClass ->
+        if (checkSubtypes) {
+            if (causeClass.isAssignableFrom(this.javaClass)) {
+                return true
+            }
+        } else {
+            if (causeClass == this.javaClass) {
+                return true
+            }
+        }
+    }
+
+    val currentCause: Throwable? = cause
+    // Check if cause is not pointing to the same instance, to avoid infinite loops.
+    if (this !== currentCause) {
+        return currentCause.hasCause(checkSubtypes, *causesToCheck)
+    }
+
+    return false
+}