time entry representation change, and basic statistics

src/stats.rs

@@ -0,0 +1,59 @@
+use crate::tasks;
+use crate::error;
+
+use std::path;
+use std::collections::HashMap;
+
+pub fn time_per_tag(days : u16, vault_folder : &path::Path) -> Result<(), error::Error> {
+
+    let tasks = tasks::Task::load_all(vault_folder, true)?;
+
+    let mut times = HashMap::<String, tasks::Duration>::new();
+
+    for task in &tasks {
+        if !task.data.discarded {
+            let mut time = tasks::Duration::zero();
+
+            for entry in &task.data.time_entries {
+                if chrono::Utc::now().naive_local().date() - entry.logged_date < chrono::Duration::days(i64::from(days)) {
+                    time = time + entry.duration;
+                }
+            }
+
+            let tag_count = task.data.tags.len();
+            let time_per_tag = time / tag_count;
+
+            for tag in &task.data.tags {
+                match times.get_mut(tag) {
+                    Some(time) => {
+                        *time = *time + time_per_tag;
+                    },
+                    None => {
+                        times.insert(tag.clone(), time);
+                    }
+                }
+            }
+        }
+    }
+
+    let mut table = comfy_table::Table::new();
+    table
+        .load_preset(comfy_table::presets::UTF8_FULL)
+        .apply_modifier(comfy_table::modifiers::UTF8_ROUND_CORNERS)
+        .set_content_arrangement(comfy_table::ContentArrangement::Dynamic);
+    table.set_header(vec!["Tag", "Time"]);
+
+    for (tag, duration) in &times {
+
+        table.add_row(
+            vec![
+                tag.clone(),
+                duration.to_string(),
+            ]
+        );
+    }
+
+    println!("{}", table);
+
+    Ok(())
+}