[IMP] account_financial_report: Add Amount cur. to General Ledger totals if the account has not set currency

Related to https://github.com/OCA/account-financial-reporting/pull/1235#issuecomment-2419269015

[FIX] account_financial_report: Avoid error in General ledger if the Show foreign currency checkbox is not checked.

Related to https://github.com/OCA/account-financial-reporting/pull/1236

TT51996

account_financial_report/report/general_ledger.py

@@ -764,6 +764,7 @@ class GeneralLedgerReport(models.AbstractModel):
             list_centralized_ml += list(centralized_ml[jnl_id].values())
         return list_centralized_ml
 
+    # flake8: noqa: C901
     def _get_report_values(self, docids, data):
         wizard_id = data["wizard_id"]
         company = self.env["res.company"].browse(data["company_id"])
@@ -838,6 +839,61 @@ class GeneralLedgerReport(models.AbstractModel):
                         account[grouped_by] = False
                         del account["list_grouped"]
         general_ledger = sorted(general_ledger, key=lambda k: k["code"])
+        # Set the bal_curr of the initial balance to 0 if it does not correspond
+        # (reducing the corresponding of the bal_curr of the initial balance).
+        for gl_item in general_ledger:
+            if not foreign_currency:
+                continue
+            if (
+                not gl_item["currency_id"]
+                or gl_item["currency_id"] != company.currency_id
+            ):
+                gl_item["fin_bal"]["bal_curr"] -= gl_item["init_bal"]["bal_curr"]
+                gl_item["init_bal"]["bal_curr"] = 0
+                if "list_grouped" in gl_item:
+                    for lg_item in gl_item["list_grouped"]:
+                        lg_item["fin_bal"]["bal_curr"] -= lg_item["init_bal"][
+                            "bal_curr"
+                        ]
+                        lg_item["init_bal"]["bal_curr"] = 0
+        # Set the fin_bal_currency_id value if the account does not have it set
+        # and there are move lines in a currency different from that of
+        # the company (USD for example).
+        for gl_item in general_ledger:
+            fin_bal_currency_ids = []
+            fin_bal_currency_id = gl_item["currency_id"]
+            if gl_item["currency_id"] or not foreign_currency:
+                continue
+            gl_item["fin_bal"]["bal_curr"] = gl_item["init_bal"]["bal_curr"]
+            if "move_lines" in gl_item:
+                for ml in gl_item["move_lines"]:
+                    ml_currency_id = (
+                        ml["currency_id"][0] if ml["currency_id"] else False
+                    )
+                    if ml_currency_id and ml_currency_id != company.currency_id.id:
+                        gl_item["fin_bal"]["bal_curr"] += ml["bal_curr"]
+                        if ml_currency_id not in fin_bal_currency_ids:
+                            fin_bal_currency_ids.append(ml_currency_id)
+            elif "list_grouped" in gl_item:
+                fin_bal_currency_ids = []
+                for lg_item in gl_item["list_grouped"]:
+                    lg_item["fin_bal"]["bal_curr"] = lg_item["init_bal"]["bal_curr"]
+                    for ml in lg_item["move_lines"]:
+                        ml_currency_id = (
+                            ml["currency_id"][0] if ml["currency_id"] else False
+                        )
+                        if ml_currency_id and ml_currency_id != company.currency_id.id:
+                            lg_item["fin_bal"]["bal_curr"] += ml["bal_curr"]
+                            gl_item["fin_bal"]["bal_curr"] += ml["bal_curr"]
+                            if ml_currency_id not in fin_bal_currency_ids:
+                                fin_bal_currency_ids.append(ml_currency_id)
+            # If there is only 1 currency, we set that one as fin_bal_currency_id
+            # The use of different move lines with different currencies (EUR + GBP)
+            # will be excluded. We use a different field to avoid showing the initial
+            # balance and/or distorting data.
+            if not gl_item["currency_id"] and len(fin_bal_currency_ids) == 1:
+                fin_bal_currency_id = fin_bal_currency_ids[0]
+            gl_item["fin_bal_currency_id"] = fin_bal_currency_id
         return {
             "doc_ids": [wizard_id],
             "doc_model": "general.ledger.report.wizard",

account_financial_report/report/general_ledger_xlsx.py

@@ -357,10 +357,11 @@ class GeneralLedgerXslx(models.AbstractModel):
                             "final_balance": account["fin_bal"]["balance"],
                         }
                     )
-                    if foreign_currency and account["currency_id"]:
+                    if foreign_currency and account["fin_bal_currency_id"]:
                         account.update(
                             {
-                                "final_bal_curr": account["fin_bal"]["bal_curr"],
+                                "final_bal_curr": total_bal_curr,
+                                "currency_id": account["fin_bal_currency_id"],
                             }
                         )
                     self.write_ending_balance_from_dict(account, report_data)

account_financial_report/report/templates/general_ledger.xml

@@ -702,10 +702,10 @@
                 />
                 <t t-set="misc_grouped_domain" t-value="[]" t-else="" />
                 <t t-if="foreign_currency">
-                    <t t-if="account['currency_id']">
+                    <t t-if="account['fin_bal_currency_id']">
                         <t
                             t-set="account_currency"
-                            t-value="currency_model.browse(account['currency_id'])"
+                            t-value="currency_model.browse(account['fin_bal_currency_id'])"
                         />
                         <div class="act_as_cell amount" style="width: 3.63%;">
                             <t t-if="type == 'account_type'">