Module template 

Template variable substitution engine for catchup URLs.

Translated from the anonymous namespace functions in CatchupController.cpp:

• FormatDateTime() — full template processing
• FormatTime() — single-char time format specifiers ({Y}, {m}, etc.)
• FormatUnits() — divisible time units ({duration:N}, {offset:N})
• FormatUtc() — absolute timestamp substitution

Functions

format_catchup_url

Format a catchup URL template by substituting all time-related placeholders.

format_catchup_url_with_granularity

Format a catchup URL template with granularity clamping.

format_now_only

Format only “now”-related timestamps in a URL template.

is_within_catchup_window

Validate whether a requested catchup time is within the allowed window.