From 8c100e72fd68c607842aa2048fb7ca701b18f5e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Pant=C5=AF=C4=8Dek?=
 <dominik.pantucek@trustica.cz>
Date: Tue, 11 Apr 2023 20:11:29 +0200
Subject: [PATCH] Add license, make atomic, handle wget failures.

---
 fetch_fio.sh | 76 ++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 59 insertions(+), 17 deletions(-)

diff --git a/fetch_fio.sh b/fetch_fio.sh
index d5c143a..11db84e 100644
--- a/fetch_fio.sh
+++ b/fetch_fio.sh
@@ -1,21 +1,63 @@
-#!/bin/bash
+#!/bin/sh
+#
+# mailman.scm
+#
+# Mailman management interface
+#
+# ISC License
+#
+# Copyright 2023 Brmlab, z.s.
+# Jan Hrach
+# Dominik Pantůček <dominik.pantucek@trustica.cz>
+#
+# Permission to use, copy, modify, and/or distribute this software
+# for any purpose with or without fee is hereby granted, provided
+# that the above copyright notice and this permission notice appear
+# in all copies.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+# WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+# AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
 
+# REST API endpoint
+APIURI=https://www.fio.cz/ib_api/rest
+
+# Each line should contain account number and Fio API token as first
+# two non-whitespace strings. The rest of each line is ignored. There
+# must be no leading whitespace.
 while read accnt; do
-	ACCNO=`echo $accnt|cut -d ' ' -f 1`
-	APIKEY=`echo $accnt|cut -d ' ' -f 2`
-	echo "Processing account $ACCNO"
+    # Extract account number and Fio token
+    ACCNO=${accnt%% *}
+    accrest=${accnt#* }
+    APIKEY=${accrest%% *}
+
+    # Log action
+    echo "Processing account $ACCNO"
+    
+    # mv $ACCNO.csv $ACCNO.csv.old
 	
-	mv $ACCNO.csv $ACCNO.csv.old
-	
-	# fetch CSV from bank
-	for i in `seq 1 3`; do
-		wget https://www.fio.cz/ib_api/rest/periods/${APIKEY}/2015-01-01/2025-01-31/transactions.csv -O $ACCNO.csv
-		if [ -s $ACCNO.csv ]; then
-			echo OK
-			break
-		else
-			echo Failed download, retrying in 5 s
-			sleep 5
-		fi
-	done
+    # Fetch CSV from bank
+    CSVNAME=$ACCNO.csv
+    for i in `seq 1 3` ; do
+	if wget $APIURI/periods/${APIKEY}/2015-01-01/2025-01-31/transactions.csv -O $CSVNAME.tmp ; then
+	    if [ -s  $CSVNAME.tmp ] ; then
+		echo OK
+		cp $CSVNAME $CSVNAME.old
+		mv $CSVNAME.tmp $CSVNAME
+		break
+	    else
+		echo Download successfull but empty or non-existing result.
+		echo Retrying in 5 s.
+	    fi
+	else
+	    echo Failed download, retrying in 5 s.
+	    sleep 5
+	fi
+    done
 done < apikey.ntlm