feat(banking): PDF statement importer and overriding column mapping (backport #55559) (#55993)

This commit is contained in:
mergify[bot]
2026-06-16 21:08:43 +05:30
committed by GitHub
parent 78b7da1a44
commit 125bda95ed
19 changed files with 2238 additions and 420 deletions

View File

@@ -27,6 +27,7 @@
"column_break_12",
"branch_code",
"bank_account_no",
"statement_password",
"address_and_contact",
"address_html",
"column_break_13",
@@ -149,6 +150,12 @@
"label": "Bank Account No",
"length": 30
},
{
"description": "Password used to open password-protected PDF statements for this account. Stored encrypted.",
"fieldname": "statement_password",
"fieldtype": "Password",
"label": "Statement PDF Password"
},
{
"fieldname": "address_and_contact",
"fieldtype": "Section Break",

View File

@@ -41,6 +41,7 @@ class BankAccount(Document):
mask: DF.Data | None
party: DF.DynamicLink | None
party_type: DF.Link | None
statement_password: DF.Password | None
# end: auto-generated types
def onload(self):

View File

@@ -28,7 +28,8 @@
"detected_transaction_starting_index",
"detected_transaction_ending_index",
"section_break_yulq",
"column_mapping"
"column_mapping",
"pdf_tables"
],
"fields": [
{
@@ -128,6 +129,13 @@
"label": "Column Mapping",
"options": "Bank Statement Import Log Column Map"
},
{
"description": "Per-table extraction data for PDF statements (rows, bbox, page image, column mapping). Edited via the banking app.",
"fieldname": "pdf_tables",
"fieldtype": "JSON",
"label": "PDF Tables",
"read_only": 1
},
{
"default": "Not Started",
"fieldname": "status",

View File

@@ -7,7 +7,18 @@ from frappe.utils import getdate
from erpnext.accounts.doctype.bank_statement_import_log.bank_statement_import_log import (
BankStatementImportLog,
build_table_transactions,
detect_column_mapping,
detect_header_row,
extract_pdf_tables,
get_float_amount,
get_statement_details,
guess_column_mapping_by_content,
reextract_pdf_table,
set_header_index,
set_pdf_table_header,
update_column_mapping,
update_pdf_tables,
)
from erpnext.accounts.test.accounts_mixin import AccountsTestMixin
from erpnext.tests.utils import ERPNextTestSuite
@@ -113,6 +124,346 @@ class TestBankStatementImportLog(ERPNextTestSuite, AccountsTestMixin):
self.assertIsNone(get_float_amount("ABCD"))
self.assertIsNone(get_float_amount("****"))
# ------------------------------------------------------------------ #
# PDF statement import
# ------------------------------------------------------------------ #
@staticmethod
def _make_pdf(html: str) -> bytes:
import pdfkit
return pdfkit.from_string(html, False)
@staticmethod
def _encrypt(pdf_bytes: bytes, password: str) -> bytes:
import io
from pypdf import PdfReader, PdfWriter
reader = PdfReader(io.BytesIO(pdf_bytes))
writer = PdfWriter()
for page in reader.pages:
writer.add_page(page)
writer.encrypt(password)
buffer = io.BytesIO()
writer.write(buffer)
return buffer.getvalue()
@staticmethod
def _auto_map(table: dict) -> dict:
"""Mimic prepare_pdf_tables' best-effort mapping for a single extracted table."""
header_index, score = detect_header_row(table["rows"])
if score >= 2:
table["header_index"] = header_index
table["column_mapping"] = detect_column_mapping(table["rows"][header_index])
else:
table["header_index"] = None
table["column_mapping"] = guess_column_mapping_by_content(table["rows"])
table["included"] = True
return table
def test_pdf_multi_page_kept_separate_and_unioned(self):
"""Tables on separate pages must NOT be merged; transactions are the union."""
html = """
<html><body>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Withdrawal</th><th>Deposit</th><th>Balance</th></tr>
<tr><td>01/04/2024</td><td>UPI PAYMENT</td><td>500.00</td><td></td><td>9500.00</td></tr>
<tr><td>03/04/2024</td><td>SALARY</td><td></td><td>20000.00</td><td>29500.00</td></tr></table>
<div style="page-break-before: always"></div>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Withdrawal</th><th>Deposit</th><th>Balance</th></tr>
<tr><td>05/04/2024</td><td>ATM WDL</td><td>2000.00</td><td></td><td>27500.00</td></tr></table>
</body></html>
"""
tables = extract_pdf_tables(self._make_pdf(html))
# Two separate tables, one per page
self.assertEqual(len(tables), 2)
self.assertEqual(sorted(t["page"] for t in tables), [1, 2])
for table in tables:
self.assertIn("bbox", table)
self.assertEqual(len(table["bbox"]), 4)
union = []
for table in tables:
final, _df, _af = build_table_transactions(self._auto_map(table))
union.extend(final)
self.assertEqual(len(union), 3)
self.assertEqual(sorted(t["date"] for t in union), ["2024-04-01", "2024-04-03", "2024-04-05"])
def test_pdf_junk_table_excluded(self):
"""A non-transactions table (ad/summary) should yield zero transactions."""
ad_table = self._auto_map({"rows": [["Open a new account!", "Call 1800-XYZ"]]})
final, _df, _af = build_table_transactions(ad_table)
self.assertEqual(final, [])
def test_headerless_content_mapping(self):
"""Without a header row, columns are guessed from their contents."""
rows = [
["01/04/2024", "UPI PAYMENT", "500.00"],
["03/04/2024", "SALARY CREDIT", "20000.00"],
]
mapping = {
c["maps_to"]: c["index"]
for c in guess_column_mapping_by_content(rows)
if c["maps_to"] != "Do not import"
}
self.assertEqual(mapping.get("Date"), 0)
self.assertEqual(mapping.get("Description"), 1)
self.assertEqual(mapping.get("Amount"), 2)
def test_pdf_password_protected(self):
"""Encrypted PDFs error without a password and succeed with the right one."""
html = """
<html><body><table border="1">
<tr><th>Date</th><th>Narration</th><th>Amount</th></tr>
<tr><td>01/04/2024</td><td>UPI PAYMENT</td><td>500.00</td></tr></table></body></html>
"""
encrypted = self._encrypt(self._make_pdf(html), "secret123")
# No / wrong password -> recognizable error
self.assertRaises(frappe.ValidationError, extract_pdf_tables, encrypted)
self.assertRaises(frappe.ValidationError, extract_pdf_tables, encrypted, "wrong")
# Correct password -> extracts
tables = extract_pdf_tables(encrypted, "secret123")
self.assertTrue(tables)
def test_pdf_no_tables_detected(self):
"""A PDF with no detectable tables raises a clear error (e.g. scanned PDFs)."""
html = "<html><body><p>Just some prose with no tabular data at all.</p></body></html>"
self.assertRaises(frappe.ValidationError, extract_pdf_tables, self._make_pdf(html))
def _create_pdf_import_log(self, html: str) -> BankStatementImportLog:
pdf_bytes = self._make_pdf(html)
file_doc = frappe.get_doc(
{
"doctype": "File",
"file_name": f"test-statement-{frappe.generate_hash(length=8)}.pdf",
"is_private": 1,
"content": pdf_bytes,
}
).insert(ignore_permissions=True)
doc = frappe.get_doc(
{
"doctype": "Bank Statement Import Log",
"name": f"test-pdf-{frappe.generate_hash(length=8)}",
"bank_account": self.bank_account,
"file": file_doc.file_url,
}
)
return doc.insert()
def test_pdf_full_lifecycle(self):
"""End-to-end doc lifecycle: insert -> rasterize -> preview -> edit -> import."""
html = """
<html><body>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Withdrawal</th><th>Deposit</th><th>Balance</th></tr>
<tr><td>01/04/2024</td><td>UPI PAYMENT</td><td>500.00</td><td></td><td>9500.00</td></tr>
<tr><td>03/04/2024</td><td>SALARY</td><td></td><td>20000.00</td><td>29500.00</td></tr></table>
<div style="page-break-before: always"></div>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Withdrawal</th><th>Deposit</th><th>Balance</th></tr>
<tr><td>05/04/2024</td><td>ATM WDL</td><td>2000.00</td><td></td><td>27500.00</td></tr></table>
</body></html>
"""
doc = self._create_pdf_import_log(html)
# before_insert populated the per-table JSON, page images and the union summary
tables = doc.get_pdf_tables()
self.assertEqual(len(tables), 2)
for table in tables:
self.assertTrue(table.get("page_image"))
self.assertIn("bbox", table)
# Page-image File must be attached to the final docname, not the client's temp id
attached_to = frappe.db.get_value("File", {"file_url": table["page_image"]}, "attached_to_name")
self.assertEqual(attached_to, doc.name)
self.assertEqual(doc.number_of_transactions, 3)
self.assertEqual(doc.total_debit_transactions, 2)
self.assertEqual(doc.total_credit_transactions, 1)
# get_statement_details returns the union and the per-table data for the editor
details = get_statement_details(doc.name)
self.assertEqual(len(details["final_transactions"]), 3)
self.assertEqual(details["raw_data"], [])
self.assertEqual(len(details["pdf_tables"]), 2)
# Excluding the second table (page 2) drops its single transaction
tables[1]["included"] = False
update_pdf_tables(doc.name, tables)
doc.reload()
self.assertEqual(doc.number_of_transactions, 2)
# Re-include and import; transactions are created for the union
tables[1]["included"] = True
update_pdf_tables(doc.name, tables)
doc.reload()
doc.insert_transactions()
doc.reload()
self.assertEqual(doc.status, "Completed")
created = frappe.get_all(
"Bank Transaction", filters={"bank_account": self.bank_account, "docstatus": 1}
)
self.assertEqual(len(created), 3)
def test_pdf_reextract_table_from_bbox(self):
"""Re-extracting a table from an adjusted bbox updates its rows and stores the bbox."""
html = """
<html><body>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Amount</th></tr>
<tr><td>01/04/2024</td><td>UPI PAYMENT</td><td>500.00</td></tr>
<tr><td>03/04/2024</td><td>SALARY</td><td>20000.00</td></tr></table>
</body></html>
"""
doc = self._create_pdf_import_log(html)
table = doc.get_pdf_tables()[0]
bbox = table["bbox"]
details = reextract_pdf_table(doc.name, table["page"], table["table_index"], bbox)
updated = details["pdf_tables"][0]
# Same region -> same rows; bbox is persisted
self.assertTrue(updated["rows"])
self.assertEqual(updated["bbox"], [round(float(v), 2) for v in bbox])
self.assertEqual(updated["rows"], table["rows"])
def test_pdf_reextract_changed_bbox_updates_rows_and_transactions(self):
"""Shrinking a table's bbox must drop rows and update the transaction count end-to-end."""
html = """
<html><body>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Amount</th></tr>
<tr><td>01/04/2024</td><td>UPI PAYMENT</td><td>500.00</td></tr>
<tr><td>03/04/2024</td><td>SALARY</td><td>20000.00</td></tr>
<tr><td>05/04/2024</td><td>ATM WDL</td><td>2000.00</td></tr>
<tr><td>07/04/2024</td><td>INTEREST</td><td>12.50</td></tr></table>
</body></html>
"""
doc = self._create_pdf_import_log(html)
original = doc.get_pdf_tables()[0]
original_rows = len(original["rows"])
original_txns = doc.number_of_transactions
# Shrink the box to roughly the top half (simulating a user drag).
x0, top, x1, bottom = original["bbox"]
shrunk = [x0, top, x1, top + (bottom - top) * 0.5]
details = reextract_pdf_table(doc.name, original["page"], original["table_index"], shrunk)
updated = details["pdf_tables"][0]
doc.reload()
self.assertLess(len(updated["rows"]), original_rows)
self.assertLess(doc.number_of_transactions, original_txns)
self.assertEqual(len(details["final_transactions"]), doc.number_of_transactions)
def test_pdf_set_table_header(self):
"""User can clear a table's header (no header row) or set a specific header row."""
html = """
<html><body>
<table border="1"><tr><th>Date</th><th>Narration</th><th>Amount</th></tr>
<tr><td>01/04/2024</td><td>UPI PAYMENT</td><td>500.00</td></tr>
<tr><td>03/04/2024</td><td>SALARY</td><td>20000.00</td></tr></table>
</body></html>
"""
doc = self._create_pdf_import_log(html)
table = doc.get_pdf_tables()[0]
self.assertEqual(table["header_index"], 0)
original = {
c["maps_to"]: c["index"] for c in table["column_mapping"] if c["maps_to"] != "Do not import"
}
# Clear the header (-1): header is removed but the mapping is preserved (not re-guessed).
details = set_pdf_table_header(doc.name, table["page"], table["table_index"], -1)
updated = details["pdf_tables"][0]
self.assertIsNone(updated["header_index"])
preserved = {
c["maps_to"]: c["index"] for c in updated["column_mapping"] if c["maps_to"] != "Do not import"
}
self.assertEqual(preserved, original)
# Set row 0 back as the header: it resolves meaningfully, so mapping is re-derived.
details = set_pdf_table_header(doc.name, table["page"], table["table_index"], 0)
updated = details["pdf_tables"][0]
self.assertEqual(updated["header_index"], 0)
mapped = {
c["maps_to"]: c["index"] for c in updated["column_mapping"] if c["maps_to"] != "Do not import"
}
self.assertEqual(mapped.get("Date"), 0)
self.assertEqual(mapped.get("Description"), 1)
# ------------------------------------------------------------------ #
# CSV/XLSX column mapping + header overrides
# ------------------------------------------------------------------ #
def _create_csv_import_log(self, csv_text: str) -> BankStatementImportLog:
file_doc = frappe.get_doc(
{
"doctype": "File",
"file_name": f"test-statement-{frappe.generate_hash(length=8)}.csv",
"is_private": 1,
"content": csv_text,
}
).insert(ignore_permissions=True)
doc = frappe.get_doc(
{
"doctype": "Bank Statement Import Log",
"bank_account": self.bank_account,
"file": file_doc.file_url,
}
)
return doc.insert()
def test_csv_update_column_mapping(self):
"""Overriding the column mapping recomputes the transaction count."""
csv_text = "Date,Narration,Amount\n01/04/2024,UPI PAYMENT,500.00\n03/04/2024,SALARY,20000.00\n"
doc = self._create_csv_import_log(csv_text)
self.assertEqual(doc.number_of_transactions, 2)
# Drop the amount column -> no amount -> no transactions detected.
mapping = [
{"index": c.index, "maps_to": "Do not import" if c.maps_to == "Amount" else c.maps_to}
for c in doc.column_mapping
]
details = update_column_mapping(doc.name, mapping)
doc.reload()
self.assertEqual(doc.number_of_transactions, 0)
self.assertEqual(len(details["final_transactions"]), 0)
def test_csv_set_header_index_preserves_mapping(self):
"""Clearing the header keeps the user's mapping; it is not re-guessed."""
csv_text = "Date,Narration,Amount\n01/04/2024,UPI PAYMENT,500.00\n03/04/2024,SALARY,20000.00\n"
doc = self._create_csv_import_log(csv_text)
self.assertEqual(doc.detected_header_index, 0)
# Manually map the Narration column (1) as Reference.
mapping = [
{
"index": c.index,
"maps_to": "Reference" if c.index == 1 else c.maps_to,
"header_text": c.header_text,
}
for c in doc.column_mapping
]
update_column_mapping(doc.name, mapping)
doc.reload()
# Clear the header row: the manual mapping must be preserved (column 1 stays Reference,
# not re-guessed to Description). The label row fails date parsing, so 2 transactions remain.
set_header_index(doc.name, -1)
doc.reload()
self.assertEqual(doc.detected_header_index, -1)
self.assertEqual(doc.number_of_transactions, 2)
current = {c.index: c.maps_to for c in doc.column_mapping}
self.assertEqual(current.get(1), "Reference")
# Restore row 0 as the header (resolves meaningfully -> re-derived from labels).
set_header_index(doc.name, 0)
doc.reload()
self.assertEqual(doc.detected_header_index, 0)
restored = {c.maps_to: c.index for c in doc.column_mapping if c.maps_to != "Do not import"}
self.assertEqual(restored.get("Description"), 1)
test_hdfc_sample_statement_data = [
["HDFC BANK Ltd. Page No .: 1 Statement of accounts", "", "", "", "", "", ""],