Move FieldPath.documentId to companion object

Author: Daeda88

firebase-firestore/src/androidMain/kotlin/dev/gitlive/firebase/firestore/firestore.kt

@@ -409,13 +409,18 @@ actual class SnapshotMetadata(val android: com.google.firebase.firestore.Snapsho
 }
 
 actual class FieldPath private constructor(val android: com.google.firebase.firestore.FieldPath) {
+
+    actual companion object {
+        actual val documentId = FieldPath(com.google.firebase.firestore.FieldPath.documentId())
+    }
+
     actual constructor(vararg fieldNames: String) : this(
         com.google.firebase.firestore.FieldPath.of(
             *fieldNames
         )
     )
 
-    actual val documentId: FieldPath get() = FieldPath(com.google.firebase.firestore.FieldPath.documentId())
+    actual val documentId: FieldPath get() = FieldPath.documentId
     actual val encoded: EncodedFieldPath = android
     override fun equals(other: Any?): Boolean = other is FieldPath && android == other.android
     override fun hashCode(): Int = android.hashCode()

firebase-firestore/src/commonMain/kotlin/dev/gitlive/firebase/firestore/firestore.kt

@@ -544,6 +544,10 @@ expect class SnapshotMetadata {
 }
 
 expect class FieldPath(vararg fieldNames: String) {
+    companion object {
+        val documentId: FieldPath
+    }
+    @Deprecated("Use companion object instead", replaceWith = ReplaceWith("FieldPath.documentId"))
     val documentId: FieldPath
     val encoded: EncodedFieldPath
 }

firebase-firestore/src/iosMain/kotlin/dev/gitlive/firebase/firestore/firestore.kt

@@ -436,8 +436,11 @@ actual class SnapshotMetadata(val ios: FIRSnapshotMetadata) {
 }
 
 actual class FieldPath private constructor(val ios: FIRFieldPath) {
+    actual companion object {
+        actual val documentId = FieldPath(FIRFieldPath.documentID())
+    }
     actual constructor(vararg fieldNames: String) : this(FIRFieldPath(fieldNames.asList()))
-    actual val documentId: FieldPath get() = FieldPath(FIRFieldPath.documentID())
+    actual val documentId: FieldPath get() = FieldPath.documentId
     actual val encoded: EncodedFieldPath = ios
     override fun equals(other: Any?): Boolean = other is FieldPath && ios == other.ios
     override fun hashCode(): Int = ios.hashCode()

firebase-firestore/src/jsMain/kotlin/dev/gitlive/firebase/firestore/firestore.kt

@@ -438,10 +438,14 @@ actual class SnapshotMetadata(val js: JsSnapshotMetadata) {
 }
 
 actual class FieldPath private constructor(val js: JsFieldPath) {
+
+    actual companion object {
+        actual val documentId = FieldPath(JsFieldPath.documentId)
+    }
     actual constructor(vararg fieldNames: String) : this(dev.gitlive.firebase.firestore.rethrow {
         js("Reflect").construct(JsFieldPath, fieldNames).unsafeCast<JsFieldPath>()
     })
-    actual val documentId: FieldPath get() = FieldPath(JsFieldPath.documentId)
+    actual val documentId: FieldPath get() = FieldPath.documentId
     actual val encoded: EncodedFieldPath = js
     override fun equals(other: Any?): Boolean = other is FieldPath && js.isEqual(other.js)
     override fun hashCode(): Int = js.hashCode()