daladim
5 years ago
6 changed files with 195 additions and 0 deletions
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//! A module to build ICal files
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pub fn build_from() { |
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} |
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//! This module handles conversion between iCal files and internal representations
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//!
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//! It is a wrapper around different Rust third-party libraries, since I haven't find any complete library that is able to parse _and_ generate iCal files
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mod parser; |
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pub use parser::parse; |
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mod builder; |
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pub use builder::build_from; |
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//! A module to parse ICal files
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use std::error::Error; |
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use ical::parser::ical::component::{IcalCalendar, IcalEvent, IcalTodo}; |
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use crate::Item; |
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use crate::item::SyncStatus; |
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use crate::item::ItemId; |
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use crate::Task; |
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use crate::Event; |
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/// Parse an iCal file into the internal representation [`crate::Item`]
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pub fn parse(content: &str, item_id: ItemId, sync_status: SyncStatus) -> Result<Item, Box<dyn Error>> { |
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let mut reader = ical::IcalParser::new(content.as_bytes()); |
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let parsed_item = match reader.next() { |
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None => return Err(format!("Invalid uCal data to parse for item {}", item_id).into()), |
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Some(item) => match item { |
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Err(err) => return Err(format!("Unable to parse uCal data for item {}: {}", item_id, err).into()), |
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Ok(item) => item, |
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} |
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}; |
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let item = match assert_single_type(&parsed_item)? { |
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CurrentType::Event(_) => { |
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Item::Event(Event::new()) |
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}, |
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CurrentType::Todo(todo) => { |
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let mut name = None; |
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for prop in &todo.properties { |
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if prop.name == "SUMMARY" { |
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name = prop.value.clone(); |
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break; |
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} |
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} |
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let name = match name { |
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Some(name) => name, |
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None => return Err(format!("Missing name for item {}", item_id).into()), |
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}; |
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Item::Task(Task::new(name, item_id, sync_status)) |
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}, |
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}; |
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// What to do with multiple items?
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if reader.next().map(|r| r.is_ok()) == Some(true) { |
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return Err("Parsing multiple items are not supported".into()); |
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} |
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Ok(item) |
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} |
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enum CurrentType<'a> { |
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Event(&'a IcalEvent), |
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Todo(&'a IcalTodo), |
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} |
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fn assert_single_type<'a>(item: &'a IcalCalendar) -> Result<CurrentType<'a>, Box<dyn Error>> { |
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let n_events = item.events.len(); |
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let n_todos = item.todos.len(); |
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let n_journals = item.journals.len(); |
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if n_events == 1 { |
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if n_todos != 0 || n_journals != 0 { |
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return Err("Only a single TODO or a single EVENT is supported".into()); |
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} else { |
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return Ok(CurrentType::Event(&item.events[0])); |
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} |
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} |
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if n_todos == 1 { |
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if n_events != 0 || n_journals != 0 { |
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return Err("Only a single TODO or a single EVENT is supported".into()); |
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} else { |
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return Ok(CurrentType::Todo(&item.todos[0])); |
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} |
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} |
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return Err("Only a single TODO or a single EVENT is supported".into()); |
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} |
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#[cfg(test)] |
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mod test { |
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const EXAMPLE_ICAL: &str = r#"BEGIN:VCALENDAR |
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VERSION:2.0 |
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PRODID:-//Nextcloud Tasks v0.13.6
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BEGIN:VTODO |
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UID:0633de27-8c32-42be-bcb8-63bc879c6185 |
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CREATED:20210321T001600 |
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LAST-MODIFIED:20210321T001600 |
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DTSTAMP:20210321T001600 |
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SUMMARY:Do not forget to do this |
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END:VTODO |
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END:VCALENDAR |
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"#; |
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const EXAMPLE_MULTIPLE_ICAL: &str = r#"BEGIN:VCALENDAR |
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VERSION:2.0 |
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PRODID:-//Nextcloud Tasks v0.13.6
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BEGIN:VTODO |
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UID:0633de27-8c32-42be-bcb8-63bc879c6185 |
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CREATED:20210321T001600 |
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LAST-MODIFIED:20210321T001600 |
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DTSTAMP:20210321T001600 |
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SUMMARY:Call Mom |
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END:VTODO |
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END:VCALENDAR |
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BEGIN:VCALENDAR |
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BEGIN:VTODO |
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UID:0633de27-8c32-42be-bcb8-63bc879c6185 |
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CREATED:20210321T001600 |
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LAST-MODIFIED:20210321T001600 |
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DTSTAMP:20210321T001600 |
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SUMMARY:Buy a gift for Mom |
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END:VTODO |
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END:VCALENDAR |
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"#; |
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use super::*; |
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use crate::item::VersionTag; |
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#[test] |
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fn test_ical_parsing() { |
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let version_tag = VersionTag::from(String::from("test-tag")); |
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let sync_status = SyncStatus::Synced(version_tag); |
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let item_id: ItemId = "http://some.id/for/testing".parse().unwrap(); |
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let item = parse(EXAMPLE_ICAL, item_id.clone(), sync_status.clone()).unwrap(); |
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let task = item.unwrap_task(); |
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assert_eq!(task.name(), "Do not forget to do this"); |
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assert_eq!(task.id(), &item_id); |
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assert_eq!(task.completed(), false); |
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assert_eq!(task.sync_status(), &sync_status); |
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} |
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#[test] |
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fn test_multiple_items_in_ical() { |
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let version_tag = VersionTag::from(String::from("test-tag")); |
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let sync_status = SyncStatus::Synced(version_tag); |
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let item_id: ItemId = "http://some.id/for/testing".parse().unwrap(); |
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let item = parse(EXAMPLE_MULTIPLE_ICAL, item_id.clone(), sync_status.clone()); |
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assert!(item.is_err()); |
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} |
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} |
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