use super::{
ICalendar, ICalendarDay, ICalendarDuration, ICalendarEntry, ICalendarParameter,
ICalendarPeriod, ICalendarRecurrenceRule, ICalendarValueType,
};
use crate::{
common::{
writer::{write_bytes, write_param, write_param_value, write_params, write_value},
PartialDateTime,
},
icalendar::{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<'_, u16> = [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 value_type = None;
for param in &self.params {
write!(out, ";")?;
line_len += 1;
if line_len + 1 > 75 {
write!(out, "\r\n ")?;
line_len = 1;
}
match param {
ICalendarParameter::Altrep(v) => {
write_uri_param(out, &mut line_len, "ALTREP", v)?;
}
ICalendarParameter::Cn(v) => {
write_param(out, &mut line_len, "CN", v)?;
}
ICalendarParameter::Cutype(v) => {
write_param(out, &mut line_len, "CUTYPE", v)?;
}
ICalendarParameter::DelegatedFrom(v) => {
write_uri_params(out, &mut line_len, "DELEGATED-FROM", v)?;
}
ICalendarParameter::DelegatedTo(v) => {
write_uri_params(out, &mut line_len, "DELEGATED-TO", v)?;
}
ICalendarParameter::Dir(v) => {
write_uri_param(out, &mut line_len, "DIR", v)?;
}
ICalendarParameter::Fmttype(v) => {
write_param(out, &mut line_len, "FMTTYPE", v)?;
}
ICalendarParameter::Fbtype(v) => {
write_param(out, &mut line_len, "FBTYPE", v)?;
}
ICalendarParameter::Language(v) => {
write_param(out, &mut line_len, "LANGUAGE", v)?;
}
ICalendarParameter::Member(v) => {
write_uri_params(out, &mut line_len, "MEMBER", v)?;
}
ICalendarParameter::Partstat(v) => {
write_param(out, &mut line_len, "PARTSTAT", v)?;
}
ICalendarParameter::Range => {
write!(out, "RANGE=THISANDFUTURE")?;
line_len += 18;
}
ICalendarParameter::Related(v) => {
write_param(out, &mut line_len, "RELATED", v)?;
}
ICalendarParameter::Reltype(v) => {
write_param(out, &mut line_len, "RELTYPE", v)?;
}
ICalendarParameter::Role(v) => {
write_param(out, &mut line_len, "ROLE", v)?;
}
ICalendarParameter::Rsvp(v) => {
write_param(
out,
&mut line_len,
"RSVP",
if *v { "TRUE" } else { "FALSE" },
)?;
}
ICalendarParameter::ScheduleAgent(v) => {
write_param(out, &mut line_len, "SCHEDULE-AGENT", v)?;
}
ICalendarParameter::ScheduleForceSend(v) => {
write_param(out, &mut line_len, "SCHEDULE-FORCE-SEND", v)?;
}
ICalendarParameter::ScheduleStatus(v) => {
write_param(out, &mut line_len, "SCHEDULE-STATUS", v)?;
}
ICalendarParameter::SentBy(v) => {
write_uri_param(out, &mut line_len, "SENT-BY", v)?;
}
ICalendarParameter::Tzid(v) => {
write_param(out, &mut line_len, "TZID", v)?;
}
ICalendarParameter::Value(v) => {
write_param(out, &mut line_len, "VALUE", v)?;
value_type = Some(v);
}
ICalendarParameter::Display(v) => {
write_params(out, &mut line_len, "DISPLAY", v)?;
}
ICalendarParameter::Email(v) => {
write_param(out, &mut line_len, "EMAIL", v)?;
}
ICalendarParameter::Feature(v) => {
write_params(out, &mut line_len, "FEATURE", v)?;
}
ICalendarParameter::Label(v) => {
write_param(out, &mut line_len, "LABEL", v)?;
}
ICalendarParameter::Size(v) => {
write!(out, "SIZE={}", v)?;
line_len += 8;
}
ICalendarParameter::Filename(v) => {
write_param(out, &mut line_len, "FILENAME", v)?;
}
ICalendarParameter::ManagedId(v) => {
write_param(out, &mut line_len, "MANAGED-ID", v)?;
}
ICalendarParameter::Order(v) => {
write!(out, "ORDER={}", v)?;
line_len += 8;
}
ICalendarParameter::Schema(v) => {
write_uri_param(out, &mut line_len, "SCHEMA", v)?;
}
ICalendarParameter::Derived(v) => {
write_param(
out,
&mut line_len,
"DERIVED",
if *v { "TRUE" } else { "FALSE" },
)?;
}
ICalendarParameter::Gap(v) => {
write!(out, "GAP={}", v)?;
line_len += 14;
}
ICalendarParameter::Linkrel(v) => {
write_uri_param(out, &mut line_len, "LINKREL", v)?;
}
ICalendarParameter::Other(v) => {
for (pos, item) in v.iter().enumerate() {
if pos == 0 {
write!(out, "{item}")?;
line_len += item.len() + 1;
} else {
if pos == 1 {
write!(out, "=")?;
} else {
write!(out, ",")?;
}
line_len += 1;
write_param_value(out, &mut line_len, item)?;
}
}
}
}
}
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, &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, value_type.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_value(out, &mut line_len, v)?;
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_param(
out: &mut impl Write,
line_len: &mut usize,
name: &str,
value: &Uri,
) -> std::fmt::Result {
write!(out, "{}=\"", name)?;
*line_len += name.len() + 3;
write_uri(out, line_len, value, false)?;
write!(out, "\"")
}
pub(crate) fn write_uri_params(
out: &mut impl Write,
line_len: &mut usize,
name: &str,
values: &[Uri],
) -> std::fmt::Result {
write!(out, "{}", name)?;
*line_len += name.len() + 1;
for (pos, v) in values.iter().enumerate() {
if pos > 0 {
write!(out, ",\"")?;
} else {
write!(out, "=\"")?;
}
*line_len += 3;
write_uri(out, line_len, v, false)?;
write!(out, "\"")?;
}
Ok(())
}
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, line_len, &v.data)
}
Uri::Location(v) => write_value(out, line_len, 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, &ICalendarValueType::DateTime)?;
}
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())?;
}
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 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.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)
}
}