First commit

core/utils.py

@@ -0,0 +1,58 @@
+from core.constants import BANDS, UNKNOWN_BAND
+from pyhamtools import LookupLib, Callinfo
+
+# Static lookup helpers from pyhamtools
+# todo in future add QRZ as a second lookup option in case it provides more data?
+lookuplib = LookupLib(lookuptype="countryfile")
+callinfo = Callinfo(lookuplib)
+
+# Infer a "mode family" from a mode.
+def infer_mode_family_from_mode(mode):
+    if mode.upper() == "CW":
+        return "CW"
+    elif mode.upper() in ["PHONE", "SSB", "USB", "LSB", "AM", "FM", "DMR", "DSTAR", "C4FM", "M17"]:
+        return "PHONE"
+    else:
+        return "DIGI"
+
+# Infer a band from a frequency in kHz
+def infer_band_from_freq(freq):
+    for b in BANDS:
+        if b.start_freq <= freq <= b.end_freq:
+            return b
+    return UNKNOWN_BAND
+
+# Infer a country name from a callsign
+def infer_country_from_callsign(call):
+    try:
+        return callinfo.get_country_name(call)
+    except KeyError as e:
+        return None
+
+# Infer a DXCC ID from a callsign
+def infer_dxcc_id_from_callsign(call):
+    try:
+        return callinfo.get_adif_id(call)
+    except KeyError as e:
+        return None
+
+# Infer a continent shortcode from a callsign
+def infer_continent_from_callsign(call):
+    try:
+        return callinfo.get_continent(call)
+    except KeyError as e:
+        return None
+
+# Infer a CQ zone from a callsign
+def infer_cq_zone_from_callsign(call):
+    try:
+        return callinfo.get_cqz(call)
+    except KeyError as e:
+        return None
+
+# Infer a ITU zone from a callsign
+def infer_itu_zone_from_callsign(call):
+    try:
+        return callinfo.get_ituz(call)
+    except KeyError as e:
+        return None