aimcal_core/
aim.rs

1// SPDX-FileCopyrightText: 2025 Zexin Yuan <aim@yzx9.xyz>
2//
3// SPDX-License-Identifier: Apache-2.0
4
5use std::error::Error;
6use std::path::{Path, PathBuf};
7
8use chrono::{DateTime, Local};
9use icalendar::{Calendar, CalendarComponent, Component};
10use tokio::fs;
11use uuid::Uuid;
12
13use crate::event::ParsedEventConditions;
14use crate::localdb::LocalDb;
15use crate::short_id::ShortIds;
16use crate::todo::{ParsedTodoConditions, ParsedTodoSort};
17use crate::{
18    Config, Event, EventConditions, EventDraft, EventPatch, Id, Pager, Todo, TodoConditions,
19    TodoDraft, TodoPatch, TodoSort,
20};
21
22/// AIM calendar application core.
23#[derive(Debug, Clone)]
24pub struct Aim {
25    now: DateTime<Local>,
26    config: Config,
27    db: LocalDb,
28    short_ids: ShortIds,
29    calendar_path: PathBuf,
30}
31
32impl Aim {
33    /// Creates a new AIM instance with the given configuration.
34    pub async fn new(mut config: Config) -> Result<Self, Box<dyn Error>> {
35        let now = Local::now();
36
37        config.normalize()?;
38        prepare(&config).await?;
39
40        let db = LocalDb::open(&config.state_dir)
41            .await
42            .map_err(|e| format!("Failed to initialize db: {e}"))?;
43
44        let short_ids = ShortIds::new(db.clone());
45        let calendar_path = config.calendar_path.clone();
46        let that = Self {
47            now,
48            config,
49            db,
50            short_ids,
51            calendar_path,
52        };
53        that.add_calendar(&that.calendar_path)
54            .await
55            .map_err(|e| format!("Failed to add calendar files: {e}"))?;
56
57        Ok(that)
58    }
59
60    /// Returns the current time in the AIM instance.
61    pub fn now(&self) -> DateTime<Local> {
62        self.now
63    }
64
65    /// Refresh the current time to now.
66    pub fn refresh_now(&mut self) {
67        self.now = Local::now();
68    }
69
70    /// Create a default event draft based on the AIM configuration.
71    pub fn default_event_draft(&self) -> EventDraft {
72        EventDraft::default()
73    }
74
75    /// Add a new event from the given draft.
76    pub async fn new_event(&self, draft: EventDraft) -> Result<impl Event, Box<dyn Error>> {
77        let uid = self.generate_uid().await?;
78        let event = draft.into_ics(&uid);
79        let path = self.get_path(&uid);
80
81        let calendar = Calendar::new().push(event.clone()).done();
82        fs::write(&path, calendar.to_string())
83            .await
84            .map_err(|e| format!("Failed to write calendar file: {e}"))?;
85
86        self.db.upsert_event(&path, &event).await?;
87
88        let todo = self.short_ids.event(event).await?;
89        Ok(todo)
90    }
91
92    /// Upsert an event into the calendar.
93    pub async fn update_event(
94        &self,
95        id: &Id,
96        patch: EventPatch,
97    ) -> Result<impl Event, Box<dyn Error>> {
98        let uid = self.short_ids.get_uid(id).await?;
99        let event = match self.db.events.get(&uid).await? {
100            Some(todo) => todo,
101            None => return Err("Todo not found".into()),
102        };
103
104        let path: PathBuf = event.path().into();
105        let mut calendar = parse_ics(&path).await?;
106        let t = calendar
107            .components
108            .iter_mut()
109            .filter_map(|a| match a {
110                CalendarComponent::Event(a) => Some(a),
111                _ => None,
112            })
113            .find(|a| a.get_uid() == Some(event.uid()))
114            .ok_or("Event not found in calendar")?;
115
116        patch.apply_to(t);
117        let todo = t.clone();
118        fs::write(&path, calendar.done().to_string())
119            .await
120            .map_err(|e| format!("Failed to write calendar file: {e}"))?;
121
122        self.db.upsert_event(&path, &todo).await?;
123
124        let todo = self.short_ids.event(todo).await?;
125        Ok(todo)
126    }
127
128    /// Get a event by its id.
129    pub async fn get_event(&self, id: &Id) -> Result<Option<impl Event + 'static>, Box<dyn Error>> {
130        let uid = self.short_ids.get_uid(id).await?;
131        match self.db.events.get(&uid).await {
132            Ok(Some(event)) => Ok(Some(self.short_ids.event(event).await?)),
133            Ok(None) => Ok(None),
134            Err(e) => Err(e.into()),
135        }
136    }
137
138    /// List events matching the given conditions.
139    pub async fn list_events(
140        &self,
141        conds: &EventConditions,
142        pager: &Pager,
143    ) -> Result<Vec<impl Event>, Box<dyn Error>> {
144        let conds = ParsedEventConditions::parse(&self.now, conds);
145        let events = self.db.events.list(&conds, pager).await?;
146        let events = self.short_ids.events(events).await?;
147        Ok(events)
148    }
149
150    /// Counts the number of events matching the given conditions.
151    pub async fn count_events(&self, conds: &EventConditions) -> Result<i64, sqlx::Error> {
152        let conds = ParsedEventConditions::parse(&self.now, conds);
153        self.db.events.count(&conds).await
154    }
155
156    /// Create a default todo draft based on the AIM configuration.
157    pub fn default_todo_draft(&self) -> TodoDraft {
158        TodoDraft::default(&self.config, self.now)
159    }
160
161    /// Add a new todo from the given draft.
162    pub async fn new_todo(&self, draft: TodoDraft) -> Result<impl Todo, Box<dyn Error>> {
163        let uid = self.generate_uid().await?;
164        let todo = draft.into_ics(&self.config, self.now, &uid);
165        let path = self.get_path(&uid);
166
167        let calendar = Calendar::new().push(todo.clone()).done();
168        fs::write(&path, calendar.to_string())
169            .await
170            .map_err(|e| format!("Failed to write calendar file: {e}"))?;
171
172        self.db.upsert_todo(&path, &todo).await?;
173
174        let todo = self.short_ids.todo(todo).await?;
175        Ok(todo)
176    }
177
178    /// Upsert an event into the calendar.
179    pub async fn update_todo(
180        &self,
181        id: &Id,
182        patch: TodoPatch,
183    ) -> Result<impl Todo, Box<dyn Error>> {
184        let uid = self.short_ids.get_uid(id).await?;
185        let todo = match self.db.todos.get(&uid).await? {
186            Some(todo) => todo,
187            None => return Err("Todo not found".into()),
188        };
189
190        let path: PathBuf = todo.path().into();
191        let mut calendar = parse_ics(&path).await?;
192        let t = calendar
193            .components
194            .iter_mut()
195            .filter_map(|a| match a {
196                CalendarComponent::Todo(a) => Some(a),
197                _ => None,
198            })
199            .find(|a| a.get_uid() == Some(todo.uid()))
200            .ok_or("Todo not found in calendar")?;
201
202        patch.apply_to(t);
203        let todo = t.clone();
204        fs::write(&path, calendar.done().to_string())
205            .await
206            .map_err(|e| format!("Failed to write calendar file: {e}"))?;
207
208        self.db.upsert_todo(&path, &todo).await?;
209
210        let todo = self.short_ids.todo(todo).await?;
211        Ok(todo)
212    }
213
214    /// Get a todo by its id.
215    pub async fn get_todo(&self, id: &Id) -> Result<Option<impl Todo + 'static>, Box<dyn Error>> {
216        let uid = self.short_ids.get_uid(id).await?;
217        match self.db.todos.get(&uid).await {
218            Ok(Some(todo)) => Ok(Some(self.short_ids.todo(todo).await?)),
219            Ok(None) => Ok(None),
220            Err(e) => Err(e.into()),
221        }
222    }
223
224    /// List todos matching the given conditions, sorted and paginated.
225    pub async fn list_todos(
226        &self,
227        conds: &TodoConditions,
228        sort: &[TodoSort],
229        pager: &Pager,
230    ) -> Result<Vec<impl Todo>, Box<dyn Error>> {
231        let conds = ParsedTodoConditions::parse(&self.now, conds);
232        let sort = ParsedTodoSort::parse_vec(&self.config, sort);
233        let todos = self.db.todos.list(&conds, &sort, pager).await?;
234        let todos = self.short_ids.todos(todos).await?;
235        Ok(todos)
236    }
237
238    /// Counts the number of todos matching the given conditions.
239    pub async fn count_todos(&self, conds: &TodoConditions) -> Result<i64, sqlx::Error> {
240        let conds = ParsedTodoConditions::parse(&self.now, conds);
241        self.db.todos.count(&conds).await
242    }
243
244    /// Close the AIM instance, saving any changes to the database.
245    pub async fn close(self) -> Result<(), Box<dyn Error>> {
246        self.db.close().await?;
247        Ok(())
248    }
249
250    async fn add_calendar(&self, calendar_path: &PathBuf) -> Result<(), Box<dyn Error>> {
251        let mut reader = fs::read_dir(calendar_path)
252            .await
253            .map_err(|e| format!("Failed to read directory: {e}"))?;
254
255        let mut handles = vec![];
256        let mut count_ics = 0;
257
258        while let Some(entry) = reader.next_entry().await? {
259            let path = entry.path();
260            match path.extension() {
261                Some(ext) if ext == "ics" => {
262                    count_ics += 1;
263                    let that = self.clone();
264                    handles.push(tokio::spawn(async move {
265                        if let Err(e) = that.add_ics(&path).await {
266                            log::error!("Failed to process file {}: {}", path.display(), e);
267                        }
268                    }));
269                }
270                _ => {}
271            }
272        }
273
274        for handle in handles {
275            handle.await?;
276        }
277
278        log::debug!("Total .ics files processed: {count_ics}");
279        Ok(())
280    }
281
282    async fn add_ics(self, path: &Path) -> Result<(), Box<dyn Error>> {
283        log::debug!("Parsing file: {}", path.display());
284        let calendar = parse_ics(path).await?;
285        log::debug!(
286            "Found {} components in {}.",
287            calendar.components.len(),
288            path.display()
289        );
290
291        for component in calendar.components {
292            log::debug!("Processing component: {component:?}");
293            match component {
294                CalendarComponent::Event(event) => self.db.upsert_event(path, &event).await?,
295                CalendarComponent::Todo(todo) => self.db.upsert_todo(path, &todo).await?,
296                _ => log::warn!("Ignoring unsupported component type: {component:?}"),
297            }
298        }
299
300        Ok(())
301    }
302
303    async fn generate_uid(&self) -> Result<String, Box<dyn Error>> {
304        for _ in 0..16 {
305            let uid = Uuid::new_v4().to_string(); // TODO: better uid
306            if self.db.todos.get(&uid).await?.is_some()
307                || fs::try_exists(&self.get_path(&uid)).await?
308            {
309                continue;
310            }
311            return Ok(uid);
312        }
313
314        Err("Failed to generate a unique UID after multiple attempts".into())
315    }
316
317    fn get_path(&self, uid: &str) -> PathBuf {
318        self.calendar_path.join(format!("{uid}.ics"))
319    }
320}
321
322async fn prepare(config: &Config) -> Result<(), Box<dyn Error>> {
323    if let Some(parent) = &config.state_dir {
324        log::info!("Ensuring state directory exists: {}", parent.display());
325        fs::create_dir_all(parent).await?;
326    }
327    Ok(())
328}
329
330async fn parse_ics(path: &Path) -> Result<Calendar, Box<dyn Error>> {
331    fs::read_to_string(path)
332        .await
333        .map_err(|e| format!("Failed to read file {}: {}", path.display(), e))?
334        .parse()
335        .map_err(|e| format!("Failed to parse calendar: {e}").into())
336}
aimcal_core/aim.rs

aimcal_core/
aim.rs
