feat: Tally Migration (#17405)

feat: Tally Migration
diff --git a/erpnext/erpnext_integrations/doctype/tally_migration/__init__.py b/erpnext/erpnext_integrations/doctype/tally_migration/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/erpnext_integrations/doctype/tally_migration/__init__.py
diff --git a/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.js b/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.js
new file mode 100644
index 0000000..104ac57
--- /dev/null
+++ b/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.js
@@ -0,0 +1,50 @@
+// Copyright (c) 2019, Frappe Technologies Pvt. Ltd. and contributors
+// For license information, please see license.txt
+
+frappe.ui.form.on('Tally Migration', {
+	onload: function(frm) {
+		frappe.realtime.on("tally_migration_progress_update", function (data) {
+			frm.dashboard.show_progress(data.title, (data.count / data.total) * 100, data.message);
+			if (data.count == data.total) {
+				window.setTimeout(title => frm.dashboard.hide_progress(title), 1500, data.title);
+			}
+		});
+	},
+	refresh: function(frm) {
+		if (frm.doc.master_data && !frm.doc.is_master_data_imported) {
+			if (frm.doc.is_master_data_processed) {
+				if (frm.doc.status != "Importing Master Data") {
+					frm.events.add_button(frm, __("Import Master Data"), "import_master_data");
+				}
+			} else {
+				if (frm.doc.status != "Processing Master Data") {
+					frm.events.add_button(frm, __("Process Master Data"), "process_master_data");
+				}
+			}
+		}
+		if (frm.doc.day_book_data && !frm.doc.is_day_book_data_imported) {
+			if (frm.doc.is_day_book_data_processed) {
+				if (frm.doc.status != "Importing Day Book Data") {
+					frm.events.add_button(frm, __("Import Day Book Data"), "import_day_book_data");
+				}
+			} else {
+				if (frm.doc.status != "Processing Day Book Data") {
+					frm.events.add_button(frm, __("Process Day Book Data"), "process_day_book_data");
+				}
+			}
+		}
+	},
+	add_button: function(frm, label, method) {
+		frm.add_custom_button(
+			label,
+			() => frm.call({
+				doc: frm.doc,
+				method: method,
+				freeze: true,
+				callback: () => {
+					frm.remove_custom_button(label);
+				}
+			})
+		);
+	}
+});
diff --git a/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.json b/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.json
new file mode 100644
index 0000000..26415ca
--- /dev/null
+++ b/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.json
@@ -0,0 +1,219 @@
+{
+ "beta": 1,
+ "creation": "2019-02-01 14:27:09.485238",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "status",
+  "master_data",
+  "is_master_data_processed",
+  "is_master_data_imported",
+  "column_break_2",
+  "tally_creditors_account",
+  "tally_debtors_account",
+  "company_section",
+  "tally_company",
+  "column_break_8",
+  "erpnext_company",
+  "processed_files_section",
+  "chart_of_accounts",
+  "parties",
+  "addresses",
+  "column_break_17",
+  "uoms",
+  "items",
+  "vouchers",
+  "accounts_section",
+  "default_warehouse",
+  "round_off_account",
+  "column_break_21",
+  "default_cost_center",
+  "day_book_section",
+  "day_book_data",
+  "column_break_27",
+  "is_day_book_data_processed",
+  "is_day_book_data_imported"
+ ],
+ "fields": [
+  {
+   "fieldname": "status",
+   "fieldtype": "Data",
+   "hidden": 1,
+   "label": "Status"
+  },
+  {
+   "fieldname": "master_data",
+   "fieldtype": "Attach",
+   "in_list_view": 1,
+   "label": "Master Data"
+  },
+  {
+   "default": "Sundry Creditors",
+   "fieldname": "tally_creditors_account",
+   "fieldtype": "Data",
+   "label": "Tally Creditors Account",
+   "reqd": 1
+  },
+  {
+   "fieldname": "column_break_2",
+   "fieldtype": "Column Break"
+  },
+  {
+   "default": "Sundry Debtors",
+   "fieldname": "tally_debtors_account",
+   "fieldtype": "Data",
+   "label": "Tally Debtors Account",
+   "reqd": 1
+  },
+  {
+   "depends_on": "is_master_data_processed",
+   "fieldname": "company_section",
+   "fieldtype": "Section Break"
+  },
+  {
+   "fieldname": "tally_company",
+   "fieldtype": "Data",
+   "label": "Tally Company",
+   "read_only": 1
+  },
+  {
+   "fieldname": "column_break_8",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "erpnext_company",
+   "fieldtype": "Data",
+   "label": "ERPNext Company"
+  },
+  {
+   "fieldname": "processed_files_section",
+   "fieldtype": "Section Break",
+   "hidden": 1,
+   "label": "Processed Files"
+  },
+  {
+   "fieldname": "chart_of_accounts",
+   "fieldtype": "Attach",
+   "label": "Chart of Accounts"
+  },
+  {
+   "fieldname": "parties",
+   "fieldtype": "Attach",
+   "label": "Parties"
+  },
+  {
+   "fieldname": "addresses",
+   "fieldtype": "Attach",
+   "label": "Addresses"
+  },
+  {
+   "fieldname": "column_break_17",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "uoms",
+   "fieldtype": "Attach",
+   "label": "UOMs"
+  },
+  {
+   "fieldname": "items",
+   "fieldtype": "Attach",
+   "label": "Items"
+  },
+  {
+   "fieldname": "vouchers",
+   "fieldtype": "Attach",
+   "label": "Vouchers"
+  },
+  {
+   "depends_on": "is_master_data_imported",
+   "fieldname": "accounts_section",
+   "fieldtype": "Section Break",
+   "label": "Accounts"
+  },
+  {
+   "fieldname": "default_warehouse",
+   "fieldtype": "Link",
+   "label": "Default Warehouse",
+   "options": "Warehouse"
+  },
+  {
+   "fieldname": "round_off_account",
+   "fieldtype": "Link",
+   "label": "Round Off Account",
+   "options": "Account"
+  },
+  {
+   "fieldname": "column_break_21",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "default_cost_center",
+   "fieldtype": "Link",
+   "label": "Default Cost Center",
+   "options": "Cost Center"
+  },
+  {
+   "fieldname": "is_master_data_processed",
+   "fieldtype": "Check",
+   "label": "Is Master Data Processed",
+   "read_only": 1
+  },
+  {
+   "fieldname": "is_day_book_data_processed",
+   "fieldtype": "Check",
+   "label": "Is Day Book Data Processed",
+   "read_only": 1
+  },
+  {
+   "fieldname": "is_day_book_data_imported",
+   "fieldtype": "Check",
+   "label": "Is Day Book Data Imported",
+   "read_only": 1
+  },
+  {
+   "fieldname": "is_master_data_imported",
+   "fieldtype": "Check",
+   "label": "Is Master Data Imported",
+   "read_only": 1
+  },
+  {
+   "depends_on": "is_master_data_imported",
+   "fieldname": "day_book_section",
+   "fieldtype": "Section Break"
+  },
+  {
+   "fieldname": "column_break_27",
+   "fieldtype": "Column Break"
+  },
+  {
+   "fieldname": "day_book_data",
+   "fieldtype": "Attach",
+   "in_list_view": 1,
+   "label": "Day Book Data"
+  }
+ ],
+ "modified": "2019-04-29 05:46:54.394967",
+ "modified_by": "Administrator",
+ "module": "ERPNext Integrations",
+ "name": "Tally Migration",
+ "owner": "Administrator",
+ "permissions": [
+  {
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "export": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "System Manager",
+   "share": 1,
+   "write": 1
+  }
+ ],
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "track_changes": 1
+}
\ No newline at end of file
diff --git a/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.py b/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.py
new file mode 100644
index 0000000..12b646d
--- /dev/null
+++ b/erpnext/erpnext_integrations/doctype/tally_migration/tally_migration.py
@@ -0,0 +1,512 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2019, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+from __future__ import unicode_literals
+
+from decimal import Decimal
+import json
+import re
+import traceback
+import zipfile
+import frappe
+from frappe import _
+from frappe.custom.doctype.custom_field.custom_field import create_custom_field
+from frappe.model.document import Document
+from frappe.model.naming import getseries, revert_series_if_last
+from frappe.utils.data import format_datetime
+from bs4 import BeautifulSoup as bs
+from erpnext import encode_company_abbr
+from erpnext.accounts.doctype.account.chart_of_accounts.chart_of_accounts import create_charts
+
+PRIMARY_ACCOUNT = "Primary"
+VOUCHER_CHUNK_SIZE = 500
+
+
+class TallyMigration(Document):
+	def autoname(self):
+		if not self.name:
+			self.name = "Tally Migration on " + format_datetime(self.creation)
+
+	def get_collection(self, data_file):
+		def sanitize(string):
+			return re.sub("", "", string)
+
+		def emptify(string):
+			string = re.sub(r"<\w+/>", "", string)
+			string = re.sub(r"<([\w.]+)>\s*<\/\1>", "", string)
+			string = re.sub(r"\r\n", "", string)
+			return string
+
+		master_file = frappe.get_doc("File", {"file_url": data_file})
+
+		with zipfile.ZipFile(master_file.get_full_path()) as zf:
+			encoded_content = zf.read(zf.namelist()[0])
+			try:
+				content = encoded_content.decode("utf-8-sig")
+			except UnicodeDecodeError:
+				content = encoded_content.decode("utf-16")
+
+		master = bs(sanitize(emptify(content)), "xml")
+		collection = master.BODY.IMPORTDATA.REQUESTDATA
+		return collection
+
+	def dump_processed_data(self, data):
+		for key, value in data.items():
+			f = frappe.get_doc({
+				"doctype": "File",
+				"file_name":  key + ".json",
+				"attached_to_doctype": self.doctype,
+				"attached_to_name": self.name,
+				"content": json.dumps(value)
+			}).insert()
+			setattr(self, key, f.file_url)
+
+	def _process_master_data(self):
+		def get_company_name(collection):
+			return collection.find_all("REMOTECMPINFO.LIST")[0].REMOTECMPNAME.string
+
+		def get_coa_customers_suppliers(collection):
+			root_type_map = {
+				"Application of Funds (Assets)": "Asset",
+				"Expenses": "Expense",
+				"Income": "Income",
+				"Source of Funds (Liabilities)": "Liability"
+			}
+			roots = set(root_type_map.keys())
+			accounts = list(get_groups(collection.find_all("GROUP"))) + list(get_ledgers(collection.find_all("LEDGER")))
+			children, parents = get_children_and_parent_dict(accounts)
+			group_set =  [acc[1] for acc in accounts if acc[2]]
+			children, customers, suppliers = remove_parties(parents, children, group_set)
+			coa = traverse({}, children, roots, roots, group_set)
+
+			for account in coa:
+				coa[account]["root_type"] = root_type_map[account]
+
+			return coa, customers, suppliers
+
+		def get_groups(accounts):
+			for account in accounts:
+				if account["NAME"] in (self.tally_creditors_account, self.tally_debtors_account):
+					yield get_parent(account), account["NAME"], 0
+				else:
+					yield get_parent(account), account["NAME"], 1
+
+		def get_ledgers(accounts):
+			for account in accounts:
+				# If Ledger doesn't have PARENT field then don't create Account
+				# For example "Profit & Loss A/c"
+				if account.PARENT:
+					yield account.PARENT.string, account["NAME"], 0
+
+		def get_parent(account):
+			if account.PARENT:
+				return account.PARENT.string
+			return {
+				("Yes", "No"): "Application of Funds (Assets)",
+				("Yes", "Yes"): "Expenses",
+				("No", "Yes"): "Income",
+				("No", "No"): "Source of Funds (Liabilities)",
+			}[(account.ISDEEMEDPOSITIVE.string, account.ISREVENUE.string)]
+
+		def get_children_and_parent_dict(accounts):
+			children, parents = {}, {}
+			for parent, account, is_group in accounts:
+				children.setdefault(parent, set()).add(account)
+				parents.setdefault(account, set()).add(parent)
+				parents[account].update(parents.get(parent, []))
+			return children, parents
+
+		def remove_parties(parents, children, group_set):
+			customers, suppliers = set(), set()
+			for account in parents:
+				if self.tally_creditors_account in parents[account]:
+					children.pop(account, None)
+					if account not in group_set:
+						suppliers.add(account)
+				elif self.tally_debtors_account in parents[account]:
+					children.pop(account, None)
+					if account not in group_set:
+						customers.add(account)
+			return children, customers, suppliers
+
+		def traverse(tree, children, accounts, roots, group_set):
+			for account in accounts:
+				if account in group_set or account in roots:
+					if account in children:
+						tree[account] = traverse({}, children, children[account], roots, group_set)
+					else:
+						tree[account] = {"is_group": 1}
+				else:
+					tree[account] = {}
+			return tree
+
+		def get_parties_addresses(collection, customers, suppliers):
+			parties, addresses = [], []
+			for account in collection.find_all("LEDGER"):
+				party_type = None
+				if account.NAME.string in customers:
+					party_type = "Customer"
+					parties.append({
+						"doctype": party_type,
+						"customer_name": account.NAME.string,
+						"tax_id": account.INCOMETAXNUMBER.string if account.INCOMETAXNUMBER else None,
+						"customer_group": "All Customer Groups",
+						"territory": "All Territories",
+						"customer_type": "Individual",
+					})
+				elif account.NAME.string in suppliers:
+					party_type = "Supplier"
+					parties.append({
+						"doctype": party_type,
+						"supplier_name": account.NAME.string,
+						"pan": account.INCOMETAXNUMBER.string if account.INCOMETAXNUMBER else None,
+						"supplier_group": "All Supplier Groups",
+						"supplier_type": "Individual",
+					})
+				if party_type:
+					address = "\n".join([a.string for a in account.find_all("ADDRESS")])
+					addresses.append({
+						"doctype": "Address",
+						"address_line1": address[:140].strip(),
+						"address_line2": address[140:].strip(),
+						"country": account.COUNTRYNAME.string if account.COUNTRYNAME else None,
+						"state": account.LEDSTATENAME.string if account.LEDSTATENAME else None,
+						"gst_state": account.LEDSTATENAME.string if account.LEDSTATENAME else None,
+						"pin_code": account.PINCODE.string if account.PINCODE else None,
+						"mobile": account.LEDGERPHONE.string if account.LEDGERPHONE else None,
+						"phone": account.LEDGERPHONE.string if account.LEDGERPHONE else None,
+						"gstin": account.PARTYGSTIN.string if account.PARTYGSTIN else None,
+						"links": [{"link_doctype": party_type, "link_name": account["NAME"]}],
+					})
+			return parties, addresses
+
+		def get_stock_items_uoms(collection):
+			uoms = []
+			for uom in collection.find_all("UNIT"):
+				uoms.append({"doctype": "UOM", "uom_name": uom.NAME.string})
+
+			items = []
+			for item in collection.find_all("STOCKITEM"):
+				items.append({
+					"doctype": "Item",
+					"item_code" : item.NAME.string,
+					"stock_uom": item.BASEUNITS.string,
+					"is_stock_item": 0,
+					"item_group": "All Item Groups",
+					"item_defaults": [{"company": self.erpnext_company}]
+				})
+			return items, uoms
+
+
+		self.publish("Process Master Data", _("Reading Uploaded File"), 1, 5)
+		collection = self.get_collection(self.master_data)
+
+		company = get_company_name(collection)
+		self.tally_company = company
+		self.erpnext_company = company
+
+		self.publish("Process Master Data", _("Processing Chart of Accounts and Parties"), 2, 5)
+		chart_of_accounts, customers, suppliers = get_coa_customers_suppliers(collection)
+		self.publish("Process Master Data", _("Processing Party Addresses"), 3, 5)
+		parties, addresses = get_parties_addresses(collection, customers, suppliers)
+		self.publish("Process Master Data", _("Processing Items and UOMs"), 4, 5)
+		items, uoms = get_stock_items_uoms(collection)
+		data = {"chart_of_accounts": chart_of_accounts, "parties": parties, "addresses": addresses, "items": items, "uoms": uoms}
+		self.publish("Process Master Data", _("Done"), 5, 5)
+
+		self.dump_processed_data(data)
+		self.is_master_data_processed = 1
+		self.status = ""
+		self.save()
+
+	def publish(self, title, message, count, total):
+		frappe.publish_realtime("tally_migration_progress_update", {"title": title, "message": message, "count": count, "total": total})
+
+	def _import_master_data(self):
+		def create_company_and_coa(coa_file_url):
+			coa_file = frappe.get_doc("File", {"file_url": coa_file_url})
+			frappe.local.flags.ignore_chart_of_accounts = True
+			company = frappe.get_doc({
+				"doctype": "Company",
+				"company_name": self.erpnext_company,
+				"default_currency": "INR",
+				"enable_perpetual_inventory": 0,
+			}).insert()
+			frappe.local.flags.ignore_chart_of_accounts = False
+			create_charts(company.name, custom_chart=json.loads(coa_file.get_content()))
+			company.create_default_warehouses()
+
+		def create_parties_and_addresses(parties_file_url, addresses_file_url):
+			parties_file = frappe.get_doc("File", {"file_url": parties_file_url})
+			for party in json.loads(parties_file.get_content()):
+				try:
+					frappe.get_doc(party).insert()
+				except:
+					self.log(party)
+			addresses_file = frappe.get_doc("File", {"file_url": addresses_file_url})
+			for address in json.loads(addresses_file.get_content()):
+				try:
+					frappe.get_doc(address).insert(ignore_mandatory=True)
+				except:
+					try:
+						gstin = address.pop("gstin", None)
+						frappe.get_doc(address).insert(ignore_mandatory=True)
+						self.log({"address": address, "message": "Invalid GSTIN: {}. Address was created without GSTIN".format(gstin)})
+					except:
+						self.log(address)
+
+
+		def create_items_uoms(items_file_url, uoms_file_url):
+			uoms_file = frappe.get_doc("File", {"file_url": uoms_file_url})
+			for uom in json.loads(uoms_file.get_content()):
+				if not frappe.db.exists(uom):
+					try:
+						frappe.get_doc(uom).insert()
+					except:
+						self.log(uom)
+
+			items_file = frappe.get_doc("File", {"file_url": items_file_url})
+			for item in json.loads(items_file.get_content()):
+				try:
+					frappe.get_doc(item).insert()
+				except:
+					self.log(item)
+
+		self.publish("Import Master Data", _("Creating Company and Importing Chart of Accounts"), 1, 4)
+		create_company_and_coa(self.chart_of_accounts)
+		self.publish("Import Master Data", _("Importing Parties and Addresses"), 2, 4)
+		create_parties_and_addresses(self.parties, self.addresses)
+		self.publish("Import Master Data", _("Importing Items and UOMs"), 3, 4)
+		create_items_uoms(self.items, self.uoms)
+		self.publish("Import Master Data", _("Done"), 4, 4)
+		self.status = ""
+		self.is_master_data_imported = 1
+		self.save()
+
+	def _process_day_book_data(self):
+		def get_vouchers(collection):
+			vouchers = []
+			for voucher in collection.find_all("VOUCHER"):
+				if voucher.ISCANCELLED.string == "Yes":
+					continue
+				inventory_entries = voucher.find_all("INVENTORYENTRIES.LIST") + voucher.find_all("ALLINVENTORYENTRIES.LIST") + voucher.find_all("INVENTORYENTRIESIN.LIST") + voucher.find_all("INVENTORYENTRIESOUT.LIST")
+				if voucher.VOUCHERTYPENAME.string not in ["Journal", "Receipt", "Payment", "Contra"] and inventory_entries:
+					function = voucher_to_invoice
+				else:
+					function = voucher_to_journal_entry
+				try:
+					vouchers.append(function(voucher))
+				except:
+					self.log(voucher)
+			return vouchers
+
+		def voucher_to_journal_entry(voucher):
+			accounts = []
+			ledger_entries = voucher.find_all("ALLLEDGERENTRIES.LIST") + voucher.find_all("LEDGERENTRIES.LIST")
+			for entry in ledger_entries:
+				account = {"account": encode_company_abbr(entry.LEDGERNAME.string, self.erpnext_company), "cost_center": self.default_cost_center}
+				if entry.ISPARTYLEDGER.string == "Yes":
+					party_details = get_party(entry.LEDGERNAME.string)
+					if party_details:
+						party_type, party_account = party_details
+						account["party_type"] = party_type
+						account["account"] = party_account
+						account["party"] = entry.LEDGERNAME.string
+				amount = Decimal(entry.AMOUNT.string)
+				if amount > 0:
+					account["credit_in_account_currency"] = str(abs(amount))
+				else:
+					account["debit_in_account_currency"] = str(abs(amount))
+				accounts.append(account)
+
+			journal_entry = {
+				"doctype": "Journal Entry",
+				"tally_guid": voucher.GUID.string,
+				"posting_date": voucher.DATE.string,
+				"company": self.erpnext_company,
+				"accounts": accounts,
+			}
+			return journal_entry
+
+		def voucher_to_invoice(voucher):
+			if voucher.VOUCHERTYPENAME.string in ["Sales", "Credit Note"]:
+				doctype = "Sales Invoice"
+				party_field = "customer"
+				account_field = "debit_to"
+				account_name = encode_company_abbr(self.tally_debtors_account, self.erpnext_company)
+				price_list_field = "selling_price_list"
+			elif voucher.VOUCHERTYPENAME.string in ["Purchase", "Debit Note"]:
+				doctype = "Purchase Invoice"
+				party_field = "supplier"
+				account_field = "credit_to"
+				account_name = encode_company_abbr(self.tally_creditors_account, self.erpnext_company)
+				price_list_field = "buying_price_list"
+
+			invoice = {
+				"doctype": doctype,
+				party_field: voucher.PARTYNAME.string,
+				"tally_guid": voucher.GUID.string,
+				"posting_date": voucher.DATE.string,
+				"due_date": voucher.DATE.string,
+				"items": get_voucher_items(voucher, doctype),
+				"taxes": get_voucher_taxes(voucher),
+				account_field: account_name,
+				price_list_field: "Tally Price List",
+				"set_posting_time": 1,
+				"disable_rounded_total": 1,
+				"company": self.erpnext_company,
+			}
+			return invoice
+
+		def get_voucher_items(voucher, doctype):
+			inventory_entries = voucher.find_all("INVENTORYENTRIES.LIST") + voucher.find_all("ALLINVENTORYENTRIES.LIST") + voucher.find_all("INVENTORYENTRIESIN.LIST") + voucher.find_all("INVENTORYENTRIESOUT.LIST")
+			if doctype == "Sales Invoice":
+				account_field = "income_account"
+			elif doctype == "Purchase Invoice":
+				account_field = "expense_account"
+			items = []
+			for entry in inventory_entries:
+				qty, uom = entry.ACTUALQTY.string.strip().split()
+				items.append({
+					"item_code": entry.STOCKITEMNAME.string,
+					"description": entry.STOCKITEMNAME.string,
+					"qty": qty.strip(),
+					"uom": uom.strip(),
+					"conversion_factor": 1,
+					"price_list_rate": entry.RATE.string.split("/")[0],
+					"cost_center": self.default_cost_center,
+					"warehouse": self.default_warehouse,
+					account_field: encode_company_abbr(entry.find_all("ACCOUNTINGALLOCATIONS.LIST")[0].LEDGERNAME.string, self.erpnext_company),
+				})
+			return items
+
+		def get_voucher_taxes(voucher):
+			ledger_entries = voucher.find_all("ALLLEDGERENTRIES.LIST") + voucher.find_all("LEDGERENTRIES.LIST")
+			taxes = []
+			for entry in ledger_entries:
+				if entry.ISPARTYLEDGER.string == "No":
+					tax_account = encode_company_abbr(entry.LEDGERNAME.string, self.erpnext_company)
+					taxes.append({
+						"charge_type": "Actual",
+						"account_head": tax_account,
+						"description": tax_account,
+						"tax_amount": entry.AMOUNT.string,
+						"cost_center": self.default_cost_center,
+					})
+			return taxes
+
+		def get_party(party):
+			if frappe.db.exists({"doctype": "Supplier", "supplier_name": party}):
+				return "Supplier", encode_company_abbr(self.tally_creditors_account, self.erpnext_company)
+			elif frappe.db.exists({"doctype": "Customer", "customer_name": party}):
+				return "Customer", encode_company_abbr(self.tally_debtors_account, self.erpnext_company)
+
+		self.publish("Process Day Book Data", _("Reading Uploaded File"), 1, 3)
+		collection = self.get_collection(self.day_book_data)
+		self.publish("Process Day Book Data", _("Processing Vouchers"), 2, 3)
+		vouchers = get_vouchers(collection)
+		self.publish("Process Day Book Data", _("Done"), 3, 3)
+		self.dump_processed_data({"vouchers": vouchers})
+		self.status = ""
+		self.is_day_book_data_processed = 1
+		self.save()
+
+	def _import_day_book_data(self):
+		def create_fiscal_years(vouchers):
+			from frappe.utils.data import add_years, getdate
+			earliest_date = getdate(min(voucher["posting_date"] for voucher in vouchers))
+			oldest_year = frappe.get_all("Fiscal Year", fields=["year_start_date", "year_end_date"], order_by="year_start_date")[0]
+			while earliest_date < oldest_year.year_start_date:
+				new_year = frappe.get_doc({"doctype": "Fiscal Year"})
+				new_year.year_start_date = add_years(oldest_year.year_start_date, -1)
+				new_year.year_end_date = add_years(oldest_year.year_end_date, -1)
+				if new_year.year_start_date.year == new_year.year_end_date.year:
+					new_year.year = new_year.year_start_date.year
+				else:
+					new_year.year = "{}-{}".format(new_year.year_start_date.year, new_year.year_end_date.year)
+				new_year.save()
+				oldest_year = new_year
+
+		def create_custom_fields(doctypes):
+			for doctype in doctypes:
+				df = {
+					"fieldtype": "Data",
+					"fieldname": "tally_guid",
+					"read_only": 1,
+					"label": "Tally GUID"
+				}
+				create_custom_field(doctype, df)
+
+		def create_price_list():
+			frappe.get_doc({
+				"doctype": "Price List",
+				"price_list_name": "Tally Price List",
+				"selling": 1,
+				"buying": 1,
+				"enabled": 1,
+				"currency": "INR"
+			}).insert()
+
+		frappe.db.set_value("Account", encode_company_abbr(self.tally_creditors_account, self.erpnext_company), "account_type", "Payable")
+		frappe.db.set_value("Account", encode_company_abbr(self.tally_debtors_account, self.erpnext_company), "account_type", "Receivable")
+		frappe.db.set_value("Company", self.erpnext_company, "round_off_account", self.round_off_account)
+
+		vouchers_file = frappe.get_doc("File", {"file_url": self.vouchers})
+		vouchers = json.loads(vouchers_file.get_content())
+
+		create_fiscal_years(vouchers)
+		create_price_list()
+		create_custom_fields(["Journal Entry", "Purchase Invoice", "Sales Invoice"])
+
+		total = len(vouchers)
+		is_last = False
+		for index in range(0, total, VOUCHER_CHUNK_SIZE):
+			if index + VOUCHER_CHUNK_SIZE >= total:
+				is_last = True
+			frappe.enqueue_doc(self.doctype, self.name, "_import_vouchers", queue="long", timeout=3600, start=index+1, total=total, is_last=is_last)
+
+	def _import_vouchers(self, start, total, is_last=False):
+		frappe.flags.in_migrate = True
+		vouchers_file = frappe.get_doc("File", {"file_url": self.vouchers})
+		vouchers = json.loads(vouchers_file.get_content())
+		chunk = vouchers[start: start + VOUCHER_CHUNK_SIZE]
+
+		for index, voucher in enumerate(chunk, start=start):
+			try:
+				doc = frappe.get_doc(voucher).insert()
+				doc.submit()
+				self.publish("Importing Vouchers", _("{} of {}").format(index, total), index, total)
+			except:
+				self.log(voucher)
+
+		if is_last:
+			self.status = ""
+			self.is_day_book_data_imported = 1
+			self.save()
+			frappe.db.set_value("Price List", "Tally Price List", "enabled", 0)
+		frappe.flags.in_migrate = False
+
+	def process_master_data(self):
+		self.status = "Processing Master Data"
+		self.save()
+		frappe.enqueue_doc(self.doctype, self.name, "_process_master_data", queue="long", timeout=3600)
+
+	def import_master_data(self):
+		self.status = "Importing Master Data"
+		self.save()
+		frappe.enqueue_doc(self.doctype, self.name, "_import_master_data", queue="long", timeout=3600)
+
+	def process_day_book_data(self):
+		self.status = "Processing Day Book Data"
+		self.save()
+		frappe.enqueue_doc(self.doctype, self.name, "_process_day_book_data", queue="long", timeout=3600)
+
+	def import_day_book_data(self):
+		self.status = "Importing Day Book Data"
+		self.save()
+		frappe.enqueue_doc(self.doctype, self.name, "_import_day_book_data", queue="long", timeout=3600)
+
+	def log(self, data=None):
+		message = "\n".join(["Data", json.dumps(data, default=str, indent=4), "Exception", traceback.format_exc()])
+		return frappe.log_error(title="Tally Migration Error", message=message)
diff --git a/erpnext/erpnext_integrations/doctype/tally_migration/test_tally_migration.js b/erpnext/erpnext_integrations/doctype/tally_migration/test_tally_migration.js
new file mode 100644
index 0000000..433c5e2
--- /dev/null
+++ b/erpnext/erpnext_integrations/doctype/tally_migration/test_tally_migration.js
@@ -0,0 +1,23 @@
+/* eslint-disable */
+// rename this file from _test_[name] to test_[name] to activate
+// and remove above this line
+
+QUnit.test("test: Tally Migration", function (assert) {
+	let done = assert.async();
+
+	// number of asserts
+	assert.expect(1);
+
+	frappe.run_serially([
+		// insert a new Tally Migration
+		() => frappe.tests.make('Tally Migration', [
+			// values to be set
+			{key: 'value'}
+		]),
+		() => {
+			assert.equal(cur_frm.doc.key, 'value');
+		},
+		() => done()
+	]);
+
+});
diff --git a/erpnext/erpnext_integrations/doctype/tally_migration/test_tally_migration.py b/erpnext/erpnext_integrations/doctype/tally_migration/test_tally_migration.py
new file mode 100644
index 0000000..9f67e55
--- /dev/null
+++ b/erpnext/erpnext_integrations/doctype/tally_migration/test_tally_migration.py
@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2019, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+from __future__ import unicode_literals
+
+import frappe
+import unittest
+
+class TestTallyMigration(unittest.TestCase):
+	pass