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use chrono::{Datelike, TimeZone, Local, Date};
use itertools::Itertools;
use yansi::{Style};
use icalwrap::*;
use utils;
use config::{self,Config,CalendarConfig};
pub fn show_events(config: Config, lines: &mut Iterator<Item = String>) {
let cals = utils::read_calendars_from_files(lines).unwrap();
let mut not_over_yet: Vec<(usize, &IcalVCalendar, IcalVEvent, Option<&CalendarConfig>)> = Vec::new();
let mut cals_iter = cals.iter()
.enumerate()
.map(|(i, cal)| (i, cal, cal.get_principal_event(), cal.get_config(&config)))
.peekable();
let start_day = match cals_iter.peek() {
Some((_, _, event, _)) => {
event
.get_dtstart()
.unwrap_or_else(|| Local.timestamp(0, 0))
.date()
}
None => return,
};
let mut cur_day = start_day.pred();
let mut last_printed_day = start_day.pred();
while cals_iter.peek().is_some() || !not_over_yet.is_empty() {
cur_day = cur_day.succ();
maybe_print_date_line_header(&config, &cur_day, &start_day, &mut last_printed_day);
not_over_yet.retain( |(index, _, event, cal_config)| {
maybe_print_date_line(&config, &cur_day, &start_day, &mut last_printed_day);
print_event_line(*cal_config, &index, &event, &cur_day);
event.continues_after(&cur_day)
});
let relevant_events = cals_iter.peeking_take_while(|(_,_,event,_)| event.relevant_on(&cur_day));
for (i, cal, event, cal_config) in relevant_events {
maybe_print_date_line(&config, &cur_day, &start_day, &mut last_printed_day);
print_event_line(cal_config, &i, &event, &cur_day);
if event.continues_after(&cur_day) {
not_over_yet.push((i, cal, event, cal_config));
}
}
}
}
fn maybe_print_week_separator(config: &Config, date: &Date<Local>, start_date: &Date<Local>, last_printed_date: &Date<Local>) {
if !config.agenda.print_week_separator {
return;
}
if date != start_date && last_printed_date.iso_week() < date.iso_week() {
println!();
}
}
fn maybe_print_date_line_header(config: &Config, date: &Date<Local>, start_date: &Date<Local>, last_printed_date: &mut Date<Local>) {
if !config.agenda.print_empty_days {
return;
}
maybe_print_date_line(config, date, start_date, last_printed_date);
}
fn maybe_print_date_line(config: &Config, date: &Date<Local>, start_date: &Date<Local>, last_printed_date: &mut Date<Local>) {
if date <= last_printed_date {
return;
}
maybe_print_week_separator(config, date, start_date, last_printed_date);
print_date_line(date);
*last_printed_date = *date;
}
fn print_date_line(date: &Date<Local>) {
let style_heading = Style::new().bold();
println!("{}, {}", style_heading.paint(date.format("%Y-%m-%d")), date.format("%A"));
}
fn print_event_line(config: Option<&CalendarConfig>, index: &usize, event: &IcalVEvent, date: &Date<Local>) {
match event_line(config, &event, &date) {
Ok(line) => println!("{:4} {}", index, line),
Err(error) => warn!("{} in {}", error, event.get_uid())
}
}
pub fn event_line(config: Option<&CalendarConfig>, event: &IcalVEvent, cur_day: &Date<Local>) -> Result<String, String> {
if event.is_allday() {
let mut summary = event.get_summary().ok_or("Invalid SUMMARY")?;
if let Some(config) = config {
let calendar_style = config::get_style_for_calendar(config);
summary = calendar_style.paint(summary).to_string();
}
Ok(format!(" {}", summary))
} else {
let mut time_sep = " ";
let dtstart = event.get_dtstart().ok_or("Invalid DTSTART")?.with_timezone(&Local);
let start_string = if &dtstart.date() != cur_day {
"".to_string()
} else {
time_sep = "-";
format!("{}", dtstart.format("%H:%M"))
};
let dtend = event.get_dtend().ok_or("Invalid DTEND")?.with_timezone(&Local);
let end_string = if &dtend.date() != cur_day {
"".to_string()
} else {
time_sep = "-";
format!("{}", dtend.format("%H:%M"))
};
let mut summary = event.get_summary().ok_or("Invalid SUMMARY")?;
if let Some(config) = config {
let calendar_style = config::get_style_for_calendar(config);
summary = calendar_style.paint(summary).to_string();
}
Ok(format!("{:5}{}{:5} {}", start_string, time_sep, end_string, summary))
}
}
impl IcalVCalendar {
fn get_config<'a>(&self, config: &'a Config) -> Option<&'a CalendarConfig> {
config::get_config_for_calendar(config, self)
}
}
impl IcalVEvent {
fn relevant_on(&self, date: &Date<Local>) -> bool {
if let Some(start) = self.get_dtstart() {
start.date() == *date
} else {
warn!("Invalid DTSTART in {}", self.get_uid());
false
}
}
fn continues_after(&self, date: &Date<Local>) -> bool {
match self.is_allday() {
true => self.get_dtend().map( |dtend| dtend.date().pred() > *date),
false => self.get_dtend().map( |dtend| dtend.date() > *date)
}.unwrap_or(false)
}
}
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