logisheets_controller 1.16.1

Core spreadsheet engine for LogiSheets: formula evaluation, dependency tracking, and undo/redo.
Documentation 
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use logisheets_base::datetime::{EasyDate, get_date_by_serial_num_1900};
use logisheets_parser::ast;

use crate::calc_engine::connector::Connector;

use super::super::{CalcValue, CalcVertex, Value};

pub fn calc_year<C>(args: Vec<CalcVertex>, fetcher: &mut C) -> CalcVertex
where
    C: Connector,
{
    calc(args, fetcher, |d| d.year)
}

pub fn calc_month<C>(args: Vec<CalcVertex>, fetcher: &mut C) -> CalcVertex
where
    C: Connector,
{
    calc(args, fetcher, |d| d.month as u32)
}

pub fn calc_day<C>(args: Vec<CalcVertex>, fetcher: &mut C) -> CalcVertex
where
    C: Connector,
{
    calc(args, fetcher, |d| d.day as u32)
}

fn calc<C, F>(args: Vec<CalcVertex>, fetcher: &mut C, func: F) -> CalcVertex
where
    C: Connector,
    F: Fn(EasyDate) -> u32,
{
    assert_or_return!(args.len() == 1, ast::Error::Unspecified);
    let first = fetcher.get_calc_value(args.into_iter().next().unwrap());
    assert_date_serial_num_from_calc_value!(n, first);
    let n = n.trunc() as u32;
    let date = get_date_by_serial_num_1900(n);
    let r = func(date) as f64;
    CalcVertex::from_number(r)
}