Načítání dat z externích zdrojů (zejm. cen)

external.js

@@ -0,0 +1,5 @@
+const EXTERNAL = {
+    USD: 21.920,
+    EUR: 23.425,
+    GBP: 26.447,
+}

external.js.tmpl

@@ -0,0 +1,5 @@
+const EXTERNAL = {
+    USD: $USD,
+    EUR: $EUR,
+    GBP: $GBP,
+}

external.py

@@ -0,0 +1,43 @@
+import logging
+from string import Template
+from urllib.request import urlopen
+
+TMPL_FILENAME = "external.js.tmpl"
+OUTPUT_FILENAME = "external.js"
+CNB_URL = "https://www.cnb.cz/cs/financni-trhy/devizovy-trh/kurzy-devizoveho-trhu/kurzy-devizoveho-trhu/denni_kurz.txt"
+
+
+def CNB():
+    ret = dict()
+    curr = {"USD", "GBP", "EUR"}
+    with urlopen(CNB_URL) as r:
+        data = r.read().decode()
+
+    for line in data.splitlines():
+        parts = line.strip().split("|")
+        if len(parts) == 5 and parts[3] in curr:
+            assert parts[2] == "1"  # mnozstvi
+            ret[parts[3]] = parts[-1].replace(",", ".")
+
+    return ret
+
+
+funcs = [
+    CNB,
+]
+
+if __name__ == "__main__":
+    logging.getLogger().setLevel(logging.INFO)
+
+    logging.info("Nacitam template %s", TMPL_FILENAME)
+    with open(TMPL_FILENAME, encoding="utf-8") as f:
+        tmpl = Template(f.read())
+
+    replacements = dict()
+    for func in funcs:
+        logging.info("Nacitam data z %s", func.__name__)
+        replacements.update(func())
+
+    logging.info("Zapisuju zmeny do %s", OUTPUT_FILENAME)
+    with open(OUTPUT_FILENAME, "wt", encoding="utf-8") as fw:
+        fw.write(tmpl.substitute(replacements))

index.html

@@ -114,6 +114,7 @@
 </footer>
 
 
+<script type='text/javascript' src='external.js'></script>
 <script type='text/javascript' src='lib.js'></script>
 <script type='text/javascript'>
     function wipeElement(el) {

kviz.html

@@ -57,6 +57,7 @@
 </footer>
 
 
+<script type='text/javascript' src='external.js'></script>
 <script type='text/javascript' src='lib.js'></script>
 <script type='text/javascript'>
     // function initMeasures() {

lib.js

@@ -1,9 +1,9 @@
 const units = {
     'Cena': {
         'kc': ['korun', 1],
-        'usd': ['dolarů', 24.313], // 2022-07-27 (cnb.cz)
-        'eur': ['eur', 24.605],
-        'gbp': ['liber', 29.098],
+        'usd': ['dolarů', EXTERNAL.USD],
+        'eur': ['eur', EXTERNAL.EUR],
+        'gbp': ['liber', EXTERNAL.GBP],
     },
     'Váha': {
         'g': ['gramů', 1/1000],