From c884aac9477b596bd4fa08e8890d318ab27c6e76 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Fri, 10 Jan 2025 15:56:21 +0100
Subject: Add scripts to convert data from investment portfolios

---
 evi_to_asn.py | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 evi_to_asn.py

(limited to 'evi_to_asn.py')

diff --git a/evi_to_asn.py b/evi_to_asn.py
new file mode 100644
index 0000000..0531f30
--- /dev/null
+++ b/evi_to_asn.py
@@ -0,0 +1,52 @@
+import csv
+import json
+import sys
+
+# Script om Evi vermogensontwikkeling om te zetten in het CSV formaat van de
+# ASN, zodat het door plotasn.py meegenomen kan worden.
+#
+# Om de data te krijgen:
+#
+# 1. Ga naar https://mijn.evivanlanschot.nl/deelnemer/vermogensontwikkeling
+# 2. Er wordt een request gedaan naar /deelnemer/vermogensontwikkeling/postjsondata
+# 3. Dit script converteert zulke data op stdin naar een CSV bestand op stdout
+
+MONTHS = {
+        'jan': '01', 'feb': '02', 'mrt': '03', 'apr': '04', 'mei': '05', 'jun': '06',
+        'jul': '07', 'aug': '08', 'sep': '09', 'okt': '10', 'nov': '11', 'dec': '12',
+        }
+
+def parse_date(s):
+    d, m, y = s.split('-')
+    return '{}-{}-20{}'.format(d, MONTHS[m], y)
+
+def evi_to_asn(json):
+    dates = [e['label'] for e in obj['categories'][0]['Category']]
+
+    cum = obj['dataset'][0]
+    assert cum['seriesName'] == 'Cumulatieve ontwikkeling'
+
+    prev = 0
+
+    for date, entry in zip(dates, cum['data']):
+        if len(entry['value']) == 0:
+            continue
+
+        value = float(entry['value'].replace(',', '.'))
+        if value == prev:
+            continue
+
+        diff = round(value - prev, 2)
+        date = parse_date(date)
+        yield '', '', '', '', '', '', '', 'EUR', prev, 'EUR', diff, date
+
+        prev = value
+
+if __name__ == '__main__':
+    for line in sys.stdin:
+        s = json.loads(line)
+        obj = json.loads(s)
+
+        wr = csv.writer(sys.stdout)
+        for line in evi_to_asn(obj):
+            wr.writerow(line)
-- 
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