show list of projects

src/lib.rs

@@ -89,6 +89,24 @@ pub fn list(file_name: &str, filter: ActivityFilter, do_group_activities: bool)
     Ok(())
 }
 
+// lists all projects
+pub fn list_projects(file_name: &str) -> Result<()> {
+    let file_content = bartib_file::get_file_content(file_name)?;
+
+    let mut all_projects : Vec<&String> = get_activities(&file_content)
+        .map(|activity| &activity.project)
+        .collect();
+
+    all_projects.sort_unstable();
+    all_projects.dedup();
+
+    for project in all_projects {
+        println!("{}", project);
+    }
+
+    Ok(())
+}
+
 fn get_index_of_first_element(length: usize, sub: Option<usize>) -> usize {
     if let Some(s) = sub {
         length.saturating_sub(s)

src/main.rs

@@ -85,6 +85,9 @@ fn main() -> Result<()> {
                         .help("do not group activities by date in list"),
                 ),
         )
+        .subcommand(
+            SubCommand::with_name("projects").about("list all projects")
+        )
         .get_matches();
 
     let file_name = matches.value_of("file").context("Please specify a file with your activity log either as -f option or as BARTIB_FILE environment variable")?;
@@ -115,7 +118,8 @@ fn run_subcommand(matches: &ArgMatches, file_name: &str) -> Result<()> {
 
             let do_group_activities = !sub_m.is_present("no_grouping") && !filter.date.is_some();
             bartib::list(file_name, filter, do_group_activities)
-        }
+        },
+        ("projects", Some(_)) => bartib::list_projects(file_name),
         _ => bail!("Unknown command"),
     }
 }