From 744d07b174e5693ea449420a31c7691901390130 Mon Sep 17 00:00:00 2001
From: Abraham Toriz <categulario@gmail.com>
Date: Fri, 30 Jul 2021 12:01:44 -0500
Subject: [PATCH] finish ical format

---
 Cargo.lock             | 18 +++++++++++
 Cargo.toml             |  1 +
 src/formatters/ical.rs | 69 ++++++++++++++++++++++++++++++------------
 3 files changed, 69 insertions(+), 19 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index db5a593..86a816d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -236,6 +236,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "hostname"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c731c3e10504cc8ed35cfe2f1db4c9274c3d35fa486e3b31df46f068ef3e867"
+dependencies = [
+ "libc",
+ "match_cfg",
+ "winapi",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.1"
@@ -280,6 +291,12 @@ version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
 
+[[package]]
+name = "match_cfg"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffbee8634e0d45d258acb448e7eaab3fce7a0a467395d4d9f228e3c1f01fb2e4"
+
 [[package]]
 name = "memchr"
 version = "2.4.0"
@@ -610,6 +627,7 @@ dependencies = [
  "clap",
  "csv",
  "directories",
+ "hostname",
  "itertools",
  "lazy_static",
  "pretty_assertions",
diff --git a/Cargo.toml b/Cargo.toml
index 39ce10b..80b8c2f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,6 +27,7 @@ regex = "1.5"
 lazy_static = "1.4"
 tempfile = "3"
 serde_json = "1.0"
+hostname = "*"
 
 [dev-dependencies]
 pretty_assertions = "0.7.2"
diff --git a/src/formatters/ical.rs b/src/formatters/ical.rs
index 75ab4fe..2d7d33f 100644
--- a/src/formatters/ical.rs
+++ b/src/formatters/ical.rs
@@ -3,8 +3,36 @@ use std::io::Write;
 use crate::models::Entry;
 use crate::error::Result;
 
+const ICAL_TIME_FORMAT: &'static str = "%Y%m%dT%H%M%SZ";
+
 pub fn print_formatted<W: Write>(entries: Vec<Entry>, out: &mut W) -> Result<()> {
-    unimplemented!()
+    writeln!(out, "BEGIN:VCALENDAR")?;
+    writeln!(out, "CALSCALE:GREGORIAN")?;
+    writeln!(out, "METHOD:PUBLISH")?;
+    writeln!(out, "PRODID:tiempo-rs")?;
+    writeln!(out, "VERSION:2.0")?;
+
+    let hostname = hostname::get()?;
+    let host = hostname.to_string_lossy();
+
+    for entry in entries.into_iter().filter(|e| e.end.is_some()) {
+        let uid = format!("tiempo-{id}", id=entry.id);
+        let note = entry.note.unwrap_or("".into());
+
+        writeln!(out, "BEGIN:VEVENT")?;
+        writeln!(out, "DESCRIPTION:{note}", note=note)?;
+        writeln!(out, "DTEND:{end}", end=entry.end.unwrap().format(ICAL_TIME_FORMAT).to_string())?;
+        writeln!(out, "DTSTAMP:{start}", start=entry.start.format(ICAL_TIME_FORMAT).to_string())?;
+        writeln!(out, "DTSTART:{start}", start=entry.start.format(ICAL_TIME_FORMAT).to_string())?;
+        writeln!(out, "SEQUENCE:0")?;
+        writeln!(out, "SUMMARY:{note}", note=note)?;
+        writeln!(out, "UID:{uid}@{host}", uid=uid, host=host)?;
+        writeln!(out, "END:VEVENT")?;
+    }
+
+    writeln!(out, "END:VCALENDAR")?;
+
+    Ok(())
 }
 
 #[cfg(test)]
@@ -22,29 +50,32 @@ mod tests {
         let an_hour_ago = now - Duration::hours(1);
         let entries = vec![
             Entry::new_sample(1, an_hour_ago, Some(now)),
-            Entry::new_sample(1, an_hour_ago, None),
+            Entry::new_sample(2, an_hour_ago, None),
         ];
 
         let mut out = Vec::new();
 
         print_formatted(entries, &mut out).unwrap();
 
-        assert_eq!(PrettyString(&String::from_utf8_lossy(&out)), PrettyString(&format!("\
-            BEGIN:VCALENDAR\
-            CALSCALE:GREGORIAN\
-            METHOD:PUBLISH\
-            PRODID:tiempo-rs\
-            VERSION:2.0\
-            BEGIN:VEVENT\
-            DESCRIPTION:{note}\
-            DTEND:{end}\
-            DTSTAMP:{now}\
-            DTSTART:{start}\
-            SEQUENCE:0\
-            SUMMARY:{note}\
-            UID:{uid}@{host}\
-            END:VEVENT\
-            END:VCALENDAR\
-        ")));
+        let host = hostname::get().unwrap();
+        let host = host.to_string_lossy();
+
+        assert_eq!(PrettyString(&String::from_utf8_lossy(&out)), PrettyString(&format!("BEGIN:VCALENDAR
+CALSCALE:GREGORIAN
+METHOD:PUBLISH
+PRODID:tiempo-rs
+VERSION:2.0
+BEGIN:VEVENT
+DESCRIPTION:{note}
+DTEND:{end}
+DTSTAMP:{start}
+DTSTART:{start}
+SEQUENCE:0
+SUMMARY:{note}
+UID:tiempo-{id}@{host}
+END:VEVENT
+END:VCALENDAR
+", note="entry 1", end=now.format(ICAL_TIME_FORMAT).to_string(),
+        start=an_hour_ago.format(ICAL_TIME_FORMAT).to_string(), id=1, host=host)));
     }
 }