feat: add logic for changed values and rows

(cherry picked from commit e53a785)

frappe/core/doctype/document_comparator/document_comparator.py

@@ -0,0 +1,91 @@
+# Copyright (c) 2023, Frappe Technologies and contributors
+# For license information, please see license.txt
+
+import json
+
+import frappe
+from frappe.core.doctype.version.version import get_diff
+from frappe.model.document import Document
+
+
+class DocumentComparator(Document):
+	# begin: auto-generated types
+	# This code is auto-generated. Do not modify anything in this block.
+
+	from typing import TYPE_CHECKING
+
+	if TYPE_CHECKING:
+		from frappe.types import DF
+
+		doctype_name: DF.Link | None
+		document: DF.DynamicLink | None
+	# end: auto-generated types
+	pass
+
+	@frappe.whitelist()
+	def compare_document(self):
+		amended_document_names = frappe.db.get_list(
+			self.doctype_name,
+			filters={"name": ("like", "%" + self.document + "%")},
+			order_by="modified",
+			pluck="name",
+			limit=5,
+		)
+		amended_docs = [frappe.get_doc(self.doctype_name, name) for name in amended_document_names]
+
+		changed = {}
+		row_changed = {}
+		for i in range(1, len(amended_docs)):
+			diff = get_diff(amended_docs[i - 1], amended_docs[i], compare_cancelled=True)
+			changed = get_diff_grid(amended_docs, i, diff, "changed", changed)
+			row_changed = get_rows_updated_grid(amended_docs, i, diff, "row_changed", row_changed)
+
+		return amended_document_names, {
+			"changed": changed,
+			"row_changed": row_changed,
+		}
+
+
+def get_diff_grid(amended_docs, i, diff, key, changed_fields):
+	for change in diff[key]:
+		fieldname = get_field_label(change[0], doctype=amended_docs[0].doctype)
+		value = change[-1]
+		if fieldname not in changed_fields:
+			changed_fields[fieldname] = [""] * len(amended_docs)
+		changed_fields[fieldname][i] = value if value else ""
+
+		if i == 1:
+			value = change[1]
+			changed_fields[fieldname][i - 1] = value if value else ""
+
+	return changed_fields
+
+
+def get_rows_updated_grid(amended_docs, i, diff, key, changed_fields):
+	for change in diff[key]:
+		table_name = get_field_label(change[0], doctype=amended_docs[0].doctype)
+		changed_fields[table_name] = {"index": change[1]}
+		for field in change[-1]:
+			fieldname = get_field_label(field[0], is_child=True)
+			value = field[-1]
+			if fieldname not in changed_fields[table_name]:
+				changed_fields[table_name][fieldname] = [""] * len(amended_docs)
+			changed_fields[table_name][fieldname][i] = value if value else ""
+
+			if i == 1:
+				value = field[1]
+				changed_fields[table_name][fieldname][i - 1] = value if value else ""
+
+	return changed_fields
+
+
+def get_field_label(fieldname, doctype=None, is_child=False):
+	if is_child:
+		label = frappe.db.get_value("DocField", {"fieldname": fieldname}, "label")
+		return label
+
+	meta = frappe.get_meta(doctype)
+	label = meta.get_label(fieldname)
+	if label not in ["No Label", "None", ""]:
+		return label
+	return fieldname