ui/curses: estimate time in progress bars

pqcli/lingo.py

@@ -1,8 +1,30 @@
+import datetime
 import typing as T
 
 from pqcli import random
 
 
+def format_float(num: float) -> str:
+    ret = f"{num:.01f}"
+    if ret.endswith("0"):
+        ret = ret[:-2]
+    return ret
+
+
+def format_timespan(timespan: datetime.timedelta) -> str:
+    num = timespan.total_seconds()
+    if num < 60.0:
+        return f"~{int(num)}s"
+    num /= 60
+    if num < 60.0:
+        return f"~{int(num)}m"
+    num /= 60
+    if num < 24.0:
+        return f"~{format_float(num)}h"
+    num /= 24
+    return f"~{format_float(num)}d"
+
+
 def generate_name() -> str:
     parts = [
         "br|cr|dr|fr|gr|j|kr|l|m|n|pr||||r|sh|tr|v|wh|x|y|z".split("|"),