use super::{
ICalendar, ICalendarDay, ICalendarDuration, ICalendarEntry, ICalendarPeriod,
ICalendarRecurrenceRule, ICalendarValueType,
};
use crate::{
common::{
IanaString, PartialDateTime,
writer::{write_bytes, write_param_value, write_text},
},
icalendar::{
ICalendarMonth, ICalendarParameterName, ICalendarParameterValue, ICalendarValue, Uri,
ValueSeparator,
},
};
use std::{
fmt::{Display, Write},
slice::Iter,
};
impl ICalendar {
pub fn write_to(&self, out: &mut impl Write) -> std::fmt::Result {
let mut component_iter: Iter<'_, u32> = [0].iter();
let mut component_stack = Vec::with_capacity(4);
loop {
if let Some(component_id) = component_iter.next() {
let component = self.components.get(*component_id as usize).unwrap();
write!(out, "BEGIN:{}\r\n", component.component_type.as_str())?;
for entry in &component.entries {
entry.write_to(out)?;
}
if !component.component_ids.is_empty() {
component_stack.push((component, component_iter));
component_iter = component.component_ids.iter();
} else {
write!(out, "END:{}\r\n", component.component_type.as_str())?;
}
} else if let Some((component, iter)) = component_stack.pop() {
write!(out, "END:{}\r\n", component.component_type.as_str())?;
component_iter = iter;
} else {
break;
}
}
Ok(())
}
}
impl ICalendarEntry {
pub fn write_to(&self, out: &mut impl Write) -> std::fmt::Result {
let mut line_len = 0;
let entry_name = self.name.as_str();
write!(out, "{}", entry_name)?;
line_len += entry_name.len();
if matches!(self.values.first(), Some(ICalendarValue::Binary(_))) {
write!(out, ";ENCODING=BASE64")?;
line_len += 18;
}
let mut types = None;
let mut last_param: Option<&ICalendarParameterName> = None;
for param in &self.params {
if last_param.is_some_and(|last_param| last_param == ¶m.name) {
write!(out, ",")?;
line_len += 1;
if line_len + 1 > 75 {
write!(out, "\r\n ")?;
line_len = 1;
}
} else {
write!(out, ";")?;
line_len += 1;
let name = param.name.as_str();
let need_len = name.len() + 1;
if line_len + need_len > 75 {
write!(out, "\r\n ")?;
line_len = 1;
}
if !matches!(param.value, ICalendarParameterValue::Null) {
write!(out, "{name}=")?;
} else {
write!(out, "{name}")?;
}
line_len += need_len;
last_param = Some(¶m.name);
}
match ¶m.value {
ICalendarParameterValue::Text(v) => {
write_param_value(out, &mut line_len, v)?;
}
ICalendarParameterValue::Integer(i) => {
write!(out, "{i}")?;
line_len += 2;
}
ICalendarParameterValue::Bool(v) => {
let v = if !matches!(param.name, ICalendarParameterName::Range) {
if *v { "TRUE" } else { "FALSE" }
} else {
"THISANDFUTURE"
};
line_len += v.len();
write!(out, "{v}")?;
}
ICalendarParameterValue::Uri(uri) => {
write!(out, "\"")?;
write_uri(out, &mut line_len, uri, false)?;
write!(out, "\"")?;
}
ICalendarParameterValue::Cutype(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Fbtype(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Partstat(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Related(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Reltype(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Role(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::ScheduleAgent(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::ScheduleForceSend(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Value(v) => {
types = Some(v);
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Display(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Feature(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Duration(v) => {
write!(out, "{v}")?;
line_len += 14;
}
ICalendarParameterValue::Linkrel(v) => {
write_param_value(out, &mut line_len, v.as_str())?;
}
ICalendarParameterValue::Null => {
last_param = None;
}
}
}
write!(out, ":")?;
let (default_type, separator) = self.name.default_types();
let separator = if !matches!(separator, ValueSeparator::Comma) {
";"
} else {
","
};
let default_type = default_type.unwrap_ical();
for (pos, value) in self.values.iter().enumerate() {
if pos > 0 {
write!(out, "{separator}")?;
line_len += 1;
}
if line_len + 1 > 75 {
write!(out, "\r\n ")?;
line_len = 1;
}
let text = match value {
ICalendarValue::Binary(v) => {
write_bytes(out, Some(&mut line_len), v)?;
continue;
}
ICalendarValue::Boolean(v) => {
let text = if *v { "TRUE" } else { "FALSE" };
write!(out, "{text}")?;
line_len += text.len();
continue;
}
ICalendarValue::Uri(v) => {
write_uri(out, &mut line_len, v, true)?;
continue;
}
ICalendarValue::PartialDateTime(v) => {
v.format_as_ical(out, types.unwrap_or(&default_type))?;
line_len += 6;
continue;
}
ICalendarValue::Duration(v) => {
write!(out, "{}", v)?;
line_len += 6;
continue;
}
ICalendarValue::RecurrenceRule(v) => {
write!(out, "{}", v)?;
line_len += 6;
continue;
}
ICalendarValue::Period(v) => {
write!(out, "{}", v)?;
line_len += 32;
continue;
}
ICalendarValue::Float(v) => {
write!(out, "{v}")?;
line_len += 4;
continue;
}
ICalendarValue::Integer(v) => {
write!(out, "{v}")?;
line_len += 4;
continue;
}
ICalendarValue::Text(v) => {
write_text(out, &mut line_len, v, true, true)?;
continue;
}
ICalendarValue::CalendarScale(v) => v.as_str(),
ICalendarValue::Method(v) => v.as_str(),
ICalendarValue::Classification(v) => v.as_str(),
ICalendarValue::Status(v) => v.as_str(),
ICalendarValue::Transparency(v) => v.as_str(),
ICalendarValue::Action(v) => v.as_str(),
ICalendarValue::BusyType(v) => v.as_str(),
ICalendarValue::ParticipantType(v) => v.as_str(),
ICalendarValue::ResourceType(v) => v.as_str(),
ICalendarValue::Proximity(v) => v.as_str(),
};
write!(out, "{text}")?;
line_len += text.len();
}
write!(out, "\r\n")
}
}
pub(crate) fn write_uri(
out: &mut impl Write,
line_len: &mut usize,
value: &Uri,
escape: bool,
) -> std::fmt::Result {
match value {
Uri::Data(v) => {
write!(out, "data:")?;
*line_len += 5;
if let Some(ct) = &v.content_type {
write!(out, "{ct};")?;
*line_len += ct.len() + 1;
}
if escape {
write!(out, "base64\\,")?;
} else {
write!(out, "base64,")?;
}
*line_len += 8;
write_bytes(out, Some(line_len), &v.data)
}
Uri::Location(v) => write_text(out, line_len, v, escape, escape),
}
}
impl Uri {
pub fn to_unwrapped_string(&self) -> String {
match self {
Uri::Data(v) => v.to_unwrapped_string(),
Uri::Location(v) => v.to_string(),
}
}
pub fn into_unwrapped_string(self) -> String {
match self {
Uri::Data(v) => v.to_unwrapped_string(),
Uri::Location(v) => v,
}
}
}
impl Display for ICalendarRecurrenceRule {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "FREQ={}", self.freq.as_str())?;
if let Some(until) = &self.until {
write!(f, ";UNTIL=")?;
until.format_as_ical(
f,
if until.has_date_and_time() {
&ICalendarValueType::DateTime
} else {
&ICalendarValueType::Date
},
)?;
}
if let Some(count) = self.count.filter(|c| *c > 0) {
write!(f, ";COUNT={}", count)?;
}
if let Some(interval) = self.interval {
write!(f, ";INTERVAL={}", interval)?;
}
if !self.bysecond.is_empty() {
write!(f, ";BYSECOND=")?;
for (pos, item) in self.bysecond.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.byminute.is_empty() {
write!(f, ";BYMINUTE=")?;
for (pos, item) in self.byminute.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.byhour.is_empty() {
write!(f, ";BYHOUR=")?;
for (pos, item) in self.byhour.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.byday.is_empty() {
write!(f, ";BYDAY=")?;
for (pos, item) in self.byday.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.bymonthday.is_empty() {
write!(f, ";BYMONTHDAY=")?;
for (pos, item) in self.bymonthday.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.byyearday.is_empty() {
write!(f, ";BYYEARDAY=")?;
for (pos, item) in self.byyearday.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.byweekno.is_empty() {
write!(f, ";BYWEEKNO=")?;
for (pos, item) in self.byweekno.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.bymonth.is_empty() {
write!(f, ";BYMONTH=")?;
for (pos, item) in self.bymonth.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if !self.bysetpos.is_empty() {
write!(f, ";BYSETPOS=")?;
for (pos, item) in self.bysetpos.iter().enumerate() {
if pos > 0 {
write!(f, ",")?;
}
write!(f, "{}", item)?;
}
}
if let Some(wkst) = self.wkst {
write!(f, ";WKST={}", wkst.as_str())?;
}
if let Some(rscale) = &self.rscale {
write!(f, ";RSCALE={}", rscale.as_str())?;
}
if let Some(skip) = &self.skip {
write!(f, ";SKIP={}", skip.as_str())?;
}
Ok(())
}
}
impl Display for ICalendarDay {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if let Some(ordwk) = self.ordwk {
write!(f, "{}", ordwk)?;
}
write!(f, "{}", self.weekday.as_str())
}
}
impl Display for ICalendarMonth {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if !self.is_leap() {
write!(f, "{}", self.month())
} else {
write!(f, "{}L", self.month())
}
}
}
impl Display for ICalendarPeriod {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
ICalendarPeriod::Range { start, end } => {
start.format_as_ical(f, &ICalendarValueType::DateTime)?;
write!(f, "/")?;
end.format_as_ical(f, &ICalendarValueType::DateTime)
}
ICalendarPeriod::Duration { start, duration } => {
start.format_as_ical(f, &ICalendarValueType::DateTime)?;
write!(f, "/{}", duration)
}
}
}
}
impl Display for ICalendarDuration {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if self.neg {
write!(f, "-")?;
}
write!(f, "P")?;
if self.is_empty() {
return write!(f, "T0S");
}
if self.weeks != 0 {
write!(f, "{}W", self.weeks)?;
}
if self.days != 0 {
write!(f, "{}D", self.days)?;
}
if self.hours != 0 || self.minutes != 0 || self.seconds != 0 {
write!(f, "T")?;
if self.hours != 0 {
write!(f, "{}H", self.hours)?;
}
if self.minutes != 0 {
write!(f, "{}M", self.minutes)?;
}
if self.seconds != 0 {
write!(f, "{}S", self.seconds)?;
}
}
Ok(())
}
}
impl PartialDateTime {
pub fn format_as_ical(
&self,
out: &mut impl Write,
fmt: &ICalendarValueType,
) -> std::fmt::Result {
if matches!(fmt, ICalendarValueType::Date | ICalendarValueType::DateTime) {
write!(
out,
"{:04}{:02}{:02}",
self.year.unwrap_or_default(),
self.month.unwrap_or_default(),
self.day.unwrap_or_default()
)?;
}
if matches!(fmt, ICalendarValueType::DateTime) {
write!(out, "T")?;
}
if matches!(fmt, ICalendarValueType::DateTime | ICalendarValueType::Time) {
write!(
out,
"{:02}{:02}{:02}",
self.hour.unwrap_or_default(),
self.minute.unwrap_or_default(),
self.second.unwrap_or_default()
)?;
if matches!((self.tz_hour, self.tz_minute), (Some(0), Some(0))) {
write!(out, "Z")?;
}
}
if matches!(fmt, ICalendarValueType::UtcOffset) {
if self.tz_minus {
write!(out, "-")?;
} else {
write!(out, "+")?;
}
write!(
out,
"{:02}{:02}",
self.tz_hour.unwrap_or_default(),
self.tz_minute.unwrap_or_default(),
)?;
}
Ok(())
}
}
impl Display for ICalendar {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.write_to(f)
}
}