use rss::{Channel, ChannelBuilder, Item}; use std::io; use errors::*; use meetup::event::Event; pub fn generate(events: &Vec) -> Result { let items: Vec = events.into_iter().map(|event| { let mut item = Item::default(); item.set_title(event.name.clone()); item.set_link(event.link.clone()); item.set_description( format!( "{}\n\n{}", description_header(&event), event.description.clone().unwrap_or("".to_owned()), ) ); item }).collect(); Ok( ChannelBuilder::default() .title("Meetup Events") .description("Upcoming meetups") .items(items) .build()? ) } /// Writes the channel to standard output. pub fn write(channel: Channel) -> Result<()> { let stdout = io::stdout(); let handle = stdout.lock(); channel.write_to(handle)?; Ok(()) } /// Generates a string containing the date and venue of an `Event` for inclusion /// in the description field of an `rss::Item`. /// /// Looks like: /// ``` text /// When: 2018-04-15 19:00 /// Where: Passage, 99 Passage des Panoramas, Paris, France /// ``` fn description_header(event: &Event) -> String { let when = if event.local_date.is_some() && event.local_time.is_some() { format!( "When: {} {}", event.local_date.clone().unwrap_or("".to_owned()), event.local_time.clone().unwrap_or("".to_owned()), ) } else { "".to_owned() }; let place = if let Some(venue) = event.venue.clone() { format!( "Where: {}, {}, {}, {}", venue.name, venue.address_1, venue.city, venue.localized_country_name, ) } else { "".to_owned() }; let header = when; let header = if !header.is_empty() && !place.is_empty() { format!("{}\n", header) } else { header }; let header = format!("{}{}", header, place); header } #[cfg(test)] mod tests { use super::*; use meetup::event::Venue; #[test] fn test_generate_builds_a_channel_of_events() { let events = vec![ Event { name: "Summer Sun Celebration".to_owned(), description: Some("Description".to_owned()), link: "http://example.com".to_owned(), local_date: Some("2018-04-13".to_owned()), local_time: Some("18:30".to_owned()), venue: None, } ]; let event = &events[0]; let channel = generate(&events).unwrap(); let item = channel.items().first().unwrap(); assert_eq!(event.name, item.title().unwrap()); assert_eq!(event.link, item.link().unwrap()); assert_eq!( format!( "When: {} {}\n\n{}", event.local_date.clone().unwrap(), event.local_time.clone().unwrap(), event.description.clone().unwrap(), ), item.description().unwrap() ); } #[test] fn description_header_makes_a_string_of_time_and_venue() { let event = Event { name: "Fairies Story 3 Release Party".to_owned(), description: Some("Empty".to_owned()), link: "http://example.com".to_owned(), local_date: Some("2018-04-15".to_owned()), local_time: Some("19:00".to_owned()), venue: Some(Venue { name: "Passage".to_owned(), address_1: "99 Passage des Panoramas".to_owned(), city: "Paris".to_owned(), localized_country_name: "France".to_owned(), }), }; let header = description_header(&event); assert_eq!( "When: 2018-04-15 19:00 Where: Passage, 99 Passage des Panoramas, Paris, France", header ); } #[test] fn description_header_excludes_when_if_no_date_present() { let header = description_header(&Event { name: "Fairies Story 3 Release Party".to_owned(), description: Some("Empty".to_owned()), link: "http://example.com".to_owned(), local_date: None, local_time: Some("19:00".to_owned()), venue: Some(Venue { name: "Passage".to_owned(), address_1: "99 Passage des Panoramas".to_owned(), city: "Paris".to_owned(), localized_country_name: "France".to_owned(), }), }); assert_eq!( "Where: Passage, 99 Passage des Panoramas, Paris, France", header ); } #[test] fn description_header_excludes_when_if_no_time_present() { let header = description_header(&Event { name: "Fairies Story 3 Release Party".to_owned(), description: Some("Empty".to_owned()), link: "http://example.com".to_owned(), local_date: Some("2018-04-15".to_owned()), local_time: None, venue: Some(Venue { name: "Passage".to_owned(), address_1: "99 Passage des Panoramas".to_owned(), city: "Paris".to_owned(), localized_country_name: "France".to_owned(), }), }); assert_eq!( "Where: Passage, 99 Passage des Panoramas, Paris, France", header ); } #[test] fn description_header_excludes_where_if_no_venue_present() { let header = description_header(&Event { name: "Fairies Story 3 Release Party".to_owned(), description: Some("Empty".to_owned()), link: "http://example.com".to_owned(), local_date: Some("2018-04-15".to_owned()), local_time: Some("19:00".to_owned()), venue: None, }); assert_eq!( "When: 2018-04-15 19:00", header ); } }