db_conn_postgres.rs 53.2 KB
Newer Older
1
2
#![cfg(feature = "postgres")]

3
4
extern crate postgres;

5
6
7
use postgres::Connection;
use time;
use time::Duration;
8
9
10

use db_conn::{MedalConnection, MedalObject};
use db_objects::*;
11
use helpers;
12

13
trait Queryable {
Robert Czechowski's avatar
rustfmt    
Robert Czechowski committed
14
15
    fn query_map_one<T, F>(&self, sql: &str, params: &[&dyn postgres::types::ToSql], f: F)
                           -> postgres::Result<Option<T>>
16
        where F: FnOnce(postgres::rows::Row<'_>) -> T;
17
18
    fn query_map_many<T, F>(&self, sql: &str, params: &[&dyn postgres::types::ToSql], f: F) -> postgres::Result<Vec<T>>
        where F: FnMut(postgres::rows::Row<'_>) -> T;
19
    fn exists(&self, sql: &str, params: &[&dyn postgres::types::ToSql]) -> bool;
20
    fn get_last_id(&self) -> Option<i32>;
21
22
23
}

impl Queryable for Connection {
Robert Czechowski's avatar
rustfmt    
Robert Czechowski committed
24
25
    fn query_map_one<T, F>(&self, sql: &str, params: &[&dyn postgres::types::ToSql], f: F)
                           -> postgres::Result<Option<T>>
26
27
        where F: FnOnce(postgres::rows::Row<'_>) -> T {
        let rows = self.query(sql, params)?;
28

29
30
        Ok(rows.iter().next().map(f))
    }
31

32
33
34
35
36
    fn query_map_many<T, F>(&self, sql: &str, params: &[&dyn postgres::types::ToSql], f: F) -> postgres::Result<Vec<T>>
        where F: FnMut(postgres::rows::Row<'_>) -> T {
        Ok(self.query(sql, params)?.iter().map(f).collect())
    }

37
38
39
40
41
    fn exists(&self, sql: &str, params: &[&dyn postgres::types::ToSql]) -> bool {
        let stmt = self.prepare(sql).unwrap();
        !stmt.query(params).unwrap().is_empty()
    }

42
43
44
45
46
47
    fn get_last_id(&self) -> Option<i32> {
        self.query("SELECT lastval()", &[]).unwrap().iter().next().map(|row| {
                                                                      let r: i64 = row.get(0);
                                                                      r as i32
                                                                  })
    }
48
    // Empty line intended
49
50
51
}

impl MedalConnection for Connection {
52
53
54
55
56
57
    fn dbtype(&self) -> &'static str { "postgres" }

    fn migration_already_applied(&self, name: &str) -> bool {
        let create_string = "CREATE TABLE IF NOT EXISTS migrations (name TEXT PRIMARY KEY);";
        self.execute(create_string, &[]).unwrap();

58
59
        let query = "SELECT name FROM migrations WHERE name = $1";
        self.exists(query, &[&name])
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
    }

    fn apply_migration(&mut self, name: &str, contents: &str) {
        print!("Applying migration `{}` … ", name);

        let tx = self.transaction().unwrap();

        tx.batch_execute(&contents).unwrap();
        tx.execute("INSERT INTO migrations (name) VALUES ($1)", &[&name]).unwrap();

        tx.commit().unwrap();

        println!("OK.");
    }

    // fn get_session<T: ToSql>(&self, key: T, keyname: &str) -> Option<SessionUser> {
    fn get_session(&self, key: &str) -> Option<SessionUser> {
77
78
79
80
81
        let query = "SELECT id, csrf_token, last_login, last_activity, permanent_login, username, password, logincode,
                            email, email_unconfirmed, email_confirmationcode, firstname, lastname, street, zip, city,
                            nation, grade, is_teacher, managed_by, oauth_provider, oauth_foreign_id, salt
                     FROM session
                     WHERE session_token = $1";
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
        let session = self.query_map_one(query, &[&key], |row| SessionUser { id: row.get(0),
                                                                             session_token: Some(key.to_string()),
                                                                             csrf_token: row.get(1),
                                                                             last_login: row.get(2),
                                                                             last_activity: row.get(3),
                                                                             permanent_login: row.get(4),

                                                                             username: row.get(5),
                                                                             password: row.get(6),
                                                                             salt: row.get(22),
                                                                             logincode: row.get(7),
                                                                             email: row.get(8),
                                                                             email_unconfirmed: row.get(9),
                                                                             email_confirmationcode: row.get(10),

                                                                             firstname: row.get(11),
                                                                             lastname: row.get(12),
                                                                             street: row.get(13),
                                                                             zip: row.get(14),
                                                                             city: row.get(15),
                                                                             nation: row.get(16),
                                                                             grade: row.get(17),

                                                                             is_teacher: row.get(18),
                                                                             managed_by: row.get(19),

                                                                             oauth_provider: row.get(20),
                                                                             oauth_foreign_id: row.get(21) })
                          .ok()??;
111
112
113

        let duration = if session.permanent_login { Duration::days(90) } else { Duration::minutes(90) };
        let now = time::get_time();
114

115
116
        if let Some(last_activity) = session.last_activity {
            if now - last_activity < duration {
117
118
119
120
                let query = "UPDATE session
                             SET last_activity = $1
                             WHERE id = $2";
                self.execute(query, &[&now, &session.id]).unwrap();
121
                return Some(session);
122
            } else {
123
124
125
126
                // Session timed out
                // Should remove session token from session
                return None;
            }
127
        }
128
129
130
        // last_activity undefined
        // TODO: What should happen here?
        None
131
132
133
134
135
136
137
138
139
140
141
142
    }
    fn save_session(&self, session: SessionUser) {
        self.execute("UPDATE session SET
                      username = $1,
                      password = $2,
                      salt = $3,
                      logincode = $4,
                      firstname = $5,
                      lastname = $6,
                      street = $7,
                      zip = $8,
                      city = $9,
143
144
145
                      grade = $10,
                      is_teacher = $11
                      WHERE id = $12",
146
147
148
149
150
151
152
153
154
155
                     &[&session.username,
                       &session.password,
                       &session.salt,
                       &session.logincode,
                       &session.firstname,
                       &session.lastname,
                       &session.street,
                       &session.zip,
                       &session.city,
                       &session.grade,
156
                       &session.is_teacher,
157
158
159
160
                       &session.id])
            .unwrap();
    }
    fn new_session(&self, session_token: &str) -> SessionUser {
161
        let csrf_token = helpers::make_csrf_token();
162
163

        let now = time::get_time();
164
165
        let query = "INSERT INTO session (session_token, csrf_token, last_activity, permanent_login, grade,
                                          is_teacher)
166
167
                     VALUES ($1, $2, $3, $4, $5, $6)";
        self.execute(query, &[&session_token, &csrf_token, &now, &false, &0, &false]).unwrap();
168

169
170
        let id = self.get_last_id().expect("Expected to get last row id");

171
        SessionUser::minimal(id, session_token.to_owned(), csrf_token)
172
173
    }
    fn get_session_or_new(&self, key: &str) -> SessionUser {
174
175
176
        let query = "UPDATE session
                     SET session_token = $1
                     WHERE session_token = $2";
177
178
179
        self.get_session(&key).ensure_alive().unwrap_or_else(|| {
                                                 // TODO: Factor this out in own function
                                                 // TODO: Should a new session key be generated every time?
180
                                                 self.execute(query, &[&Option::<String>::None, &key]).unwrap();
181
182
                                                 self.new_session(&key)
                                             })
183
184
185
    }

    fn get_user_by_id(&self, user_id: i32) -> Option<SessionUser> {
186
187
188
189
190
        let query = "SELECT session_token, csrf_token, last_login, last_activity, permanent_login, username, password,
                            logincode, email, email_unconfirmed, email_confirmationcode, firstname, lastname, street,
                            zip, city, nation, grade, is_teacher, managed_by, oauth_provider, oauth_foreign_id, salt
                     FROM session
                     WHERE id = $1";
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
        self.query_map_one(query, &[&user_id], |row| SessionUser { id: user_id,
                                                                   session_token: row.get(0),
                                                                   csrf_token: row.get(1),
                                                                   last_login: row.get(2),
                                                                   last_activity: row.get(3),
                                                                   permanent_login: row.get(4),

                                                                   username: row.get(5),
                                                                   password: row.get(6),
                                                                   salt: row.get(22),
                                                                   logincode: row.get(7),
                                                                   email: row.get(8),
                                                                   email_unconfirmed: row.get(9),
                                                                   email_confirmationcode: row.get(10),

                                                                   firstname: row.get(11),
                                                                   lastname: row.get(12),
                                                                   street: row.get(13),
                                                                   zip: row.get(14),
                                                                   city: row.get(15),
                                                                   nation: row.get(16),
                                                                   grade: row.get(17),

                                                                   is_teacher: row.get(18),
                                                                   managed_by: row.get(19),

                                                                   oauth_provider: row.get(20),
                                                                   oauth_foreign_id: row.get(21) })
219
            .ok()?
220
221
222
223
224
225
226
227
228
229
    }

    fn get_user_and_group_by_id(&self, user_id: i32) -> Option<(SessionUser, Option<Group>)> {
        let session = self.get_user_by_id(user_id)?;

        let group_id = match session.managed_by {
            Some(id) => id,
            None => return Some((session, None)),
        };

230
231
232
        let query = "SELECT name, groupcode, tag, admin
                     FROM usergroup
                     WHERE id = $1";
233
234
235
236
237
238
239
240
241
        let res = self.query_map_one(query, &[&group_id], |row| Group { id: Some(group_id),
                                                                        name: row.get(0),
                                                                        groupcode: row.get(1),
                                                                        tag: row.get(2),
                                                                        admin: row.get(3),
                                                                        members: Vec::new() })
                      .ok()?;
        match res {
            Some(group) => Some((session, Some(group))),
242
243
244
245
246
247
            _ => Some((session, None)),
        }
    }

    //TODO: use session
    fn login(&self, _session: Option<&str>, username: &str, password: &str) -> Result<String, ()> {
248
249
250
251
        let query = "SELECT id, password, salt
                     FROM session
                     WHERE username = $1";
        self.query_map_one(query, &[&username], |row| {
252
253
254
255
                let (id, password_hash, salt): (i32, Option<String>, Option<String>) =
                    (row.get(0), row.get(1), row.get(2));

                //password_hash ist das, was in der Datenbank steht
256
257
258
                if helpers::verify_password(&password,
                                            &salt.expect("salt from database empty"),
                                            &password_hash.expect("password from database empty"))
259
260
261
262
                {
                    // TODO: fail more pleasantly
                    // Login okay, update session now!

263
264
                    let session_token = helpers::make_session_token();
                    let csrf_token = helpers::make_csrf_token();
265
266
                    let now = time::get_time();

267
268
269
                    let query = "UPDATE session
                                 SET session_token = $1, csrf_token = $2, last_login = $3, last_activity = $3
                                 WHERE id = $4";
270
                    self.execute(query, &[&session_token, &csrf_token, &now, &id]).unwrap();
271
272
273
274
275

                    Ok(session_token)
                } else {
                    Err(())
                }
276
277
278
            })
            .map_err(|_| ())?
            .ok_or(())?
279
280
281
282
    }

    //TODO: use session
    fn login_with_code(&self, _session: Option<&str>, logincode: &str) -> Result<String, ()> {
283
284
285
286
        let query = "SELECT id
                     FROM session
                     WHERE logincode = $1";
        self.query_map_one(query, &[&logincode], |row| {
287
288
289
                // Login okay, update session now!
                let id: i32 = row.get(0);

290
291
                let session_token = helpers::make_session_token();
                let csrf_token = helpers::make_csrf_token();
292
293
                let now = time::get_time();

294
295
296
                let query = "UPDATE session
                             SET session_token = $1, csrf_token = $2, last_login = $3, last_activity = $3
                             WHERE id = $4";
297
                self.execute(query, &[&session_token, &csrf_token, &now, &id]).unwrap();
298

299
                session_token
300
301
302
            })
            .map_err(|_| ())?
            .ok_or(())
303
304
305
    }

    //TODO: use session
306
307
    fn login_foreign(&self, _session: Option<&str>, foreign_id: &str, is_teacher: bool, firstname: &str,
                     lastname: &str)
308
309
                     -> Result<String, ()>
    {
310
311
        let session_token = helpers::make_session_token();
        let csrf_token = helpers::make_csrf_token();
312
313
        let now = time::get_time();

314
315
316
        let query = "SELECT id
                     FROM session
                     WHERE oauth_foreign_id = $1";
317
318
        match self.query_map_one(query, &[&foreign_id], |row| -> i32 { row.get(0) }) {
            Ok(Some(id)) => {
319
320
321
                let query = "UPDATE session
                             SET session_token = $1, csrf_token = $2, last_login = $3, last_activity = $3
                             WHERE id = $4";
322
                self.execute(query, &[&session_token, &csrf_token, &now, &id]).unwrap();
323
324
325
326
327

                Ok(session_token)
            }
            // Add!
            _ => {
328
329
330
331
                let query = "INSERT INTO session (session_token, csrf_token, last_login, last_activity,
                                                  permanent_login, grade, is_teacher, oauth_foreign_id,
                                                  firstname, lastname)
                             VALUES ($1, $2, $3, $3, $4, $5, $6, $7, $8, $9)";
332
333
334
335
336
337
338
339
340
341
342
                self.execute(query,
                             &[&session_token,
                               &csrf_token,
                               &now,
                               &false,
                               &0,
                               &is_teacher,
                               &foreign_id,
                               &firstname,
                               &lastname])
                    .unwrap();
343
344
345
346
347
348
349
350

                Ok(session_token)
            }
        }
    }

    //TODO: use session
    fn create_user_with_groupcode(&self, _session: Option<&str>, groupcode: &str) -> Result<String, ()> {
351
352
353
        let query = "SELECT id
                     FROM usergroup
                     WHERE groupcode = $1";
354
355
        let group_id =
            self.query_map_one(query, &[&groupcode], |row| -> i32 { row.get(0) }).map_err(|_| ())?.ok_or(())?;
356

357
358
359
        // Login okay, create session!
        let session_token = helpers::make_session_token();
        let csrf_token = helpers::make_csrf_token();
360
        let login_code = helpers::make_login_code(); // TODO: check for collisions
361
        let now = time::get_time();
362

363
364
365
        let query = "INSERT INTO session (session_token, csrf_token, last_login, last_activity, permanent_login,
                                          logincode, grade, is_teacher, managed_by)
                     VALUES ($1, $2, $3, $3, $4, $5, $6, $7, $8)";
366
        self.execute(query, &[&session_token, &csrf_token, &now, &false, &login_code, &0, &false, &group_id]).unwrap();
367

368
        Ok(session_token)
369
370
    }

Robert Czechowski's avatar
rustfmt    
Robert Czechowski committed
371
    fn create_group_with_users(&self, mut group: Group) {
372
373
374
375
376
377
        // Generate group ID:
        group.save(self);

        for user in group.members {
            let csrf_token = helpers::make_csrf_token();
            let login_code = helpers::make_login_code(); // TODO: check for collisions
Robert Czechowski's avatar
rustfmt    
Robert Czechowski committed
378

379
380
381
            let query = "INSERT INTO session (firstname, lastname, csrf_token, permanent_login, logincode, grade,
                                              is_teacher, managed_by)
                         VALUES ($1, $2, $3, $4, $5, $6, $7, $8)";
382
383
384
385
386
387
388
389
390
391
            self.execute(query,
                         &[&user.firstname,
                           &user.lastname,
                           &csrf_token,
                           &false,
                           &login_code,
                           &user.grade,
                           &false,
                           &group.id])
                .unwrap();
392
        }
393
394
    }

395
    fn logout(&self, session: &str) {
396
397
398
        let query = "UPDATE session
                     SET session_token = NULL
                     WHERE session_token = $1";
399
        self.execute(query, &[&session]).unwrap();
400
401
402
403
    }

    fn load_submission(&self, session: &SessionUser, task: i32, subtask: Option<&str>) -> Option<Submission> {
        match subtask {
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
            None => {
                let query = "SELECT id, grade, validated, nonvalidated_grade, value, date, needs_validation
                             FROM submission
                             WHERE task = $1
                             AND session = $2
                             ORDER BY id DESC
                             LIMIT 1";
                self.query_map_one(query, &[&task, &session.id], |row| Submission { id: Some(row.get(0)),
                                                                                    task: task,
                                                                                    session_user: session.id,
                                                                                    grade: row.get(1),
                                                                                    validated: row.get(2),
                                                                                    nonvalidated_grade: row.get(3),
                                                                                    subtask_identifier: None,
                                                                                    value: row.get(4),
                                                                                    date: row.get(5),
                                                                                    needs_validation: row.get(6) })
                    .ok()?
            }
            Some(subtask_id) => {
                let query = "SELECT id, grade, validated, nonvalidated_grade, value, date, needs_validation
                             FROM submission
                             WHERE task = $1
                             AND session = $2
                             AND subtask_identifier = $3
                             ORDER BY id DESC
                             LIMIT 1";
                self.query_map_one(query, &[&task, &session.id, &subtask_id], |row| {
                        Submission { id: Some(row.get(0)),
                                     task: task,
                                     session_user: session.id,
                                     grade: row.get(1),
                                     validated: row.get(2),
                                     nonvalidated_grade: row.get(3),
                                     subtask_identifier: Some(subtask_id.to_string()),
                                     value: row.get(4),
                                     date: row.get(5),
                                     needs_validation: row.get(6) }
                    })
                    .ok()?
            }
445
446
447
448
449
450
451
452
453
454
455
456
457
        }
    }
    fn submit_submission(&self, mut submission: Submission) {
        submission.save(self);

        let mut grade = self.get_grade_by_submission(submission.id.unwrap());
        if grade.grade.is_none() || submission.grade > grade.grade.unwrap() {
            grade.grade = Some(submission.grade);
            grade.validated = false;
            grade.save(self);
        }
    }
    fn get_grade_by_submission(&self, submission_id: i32) -> Grade {
458
459
460
461
462
463
        let query = "SELECT grade.taskgroup, grade.session, grade.grade, grade.validated
                     FROM grade
                     JOIN task ON grade.taskgroup = task.taskgroup
                     JOIN submission ON task.id = submission.task
                     AND grade.session = submission.session
                     WHERE submission.id = $1";
464
465
466
467
468
469
470
        self.query_map_one(query, &[&submission_id], |row| Grade { taskgroup: row.get(0),
                                                                   user: row.get(1),
                                                                   grade: row.get(2),
                                                                   validated: row.get(3) })
            .unwrap_or(None)
            .unwrap_or_else(|| {
                let query = "SELECT task.taskgroup, submission.session
471
472
473
                         FROM submission
                         JOIN task ON task.id = submission.task
                         WHERE submission.id = $1";
474
475
476
477
478
479
480
                self.query_map_one(query, &[&submission_id], |row| Grade { taskgroup: row.get(0),
                                                                           user: row.get(1),
                                                                           grade: None,
                                                                           validated: false })
                    .unwrap()
                    .unwrap() // should this unwrap?
            })
481
482
483
484
    }

    fn get_contest_groups_grades(&self, session_id: i32, contest_id: i32)
                                 -> (Vec<String>, Vec<(Group, Vec<(UserInfo, Vec<Grade>)>)>) {
485
486
487
488
        let query = "SELECT id, name
                     FROM taskgroup
                     WHERE contest = $1
                     ORDER BY id ASC";
489
490
491
        let tasknames: Vec<(i32, String)> =
            self.query_map_many(query, &[&contest_id], |row| (row.get(0), row.get(1))).unwrap();

492
493
494
495
496
497
498
        let mut taskindex: ::std::collections::BTreeMap<i32, usize> = ::std::collections::BTreeMap::new();

        let n_tasks = tasknames.len();
        for (index, (i, _)) in tasknames.iter().enumerate() {
            taskindex.insert(*i, index);
        }

499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
        let query = "SELECT grade.taskgroup, grade.session, grade.grade, grade.validated, usergroup.id, usergroup.name,
                            usergroup.groupcode, usergroup.tag, student.id, student.username, student.logincode,
                            student.firstname, student.lastname
                     FROM grade
                     JOIN taskgroup ON grade.taskgroup = taskgroup.id
                     JOIN session AS student ON grade.session = student.id
                     JOIN usergroup ON student.managed_by = usergroup.id
                     WHERE usergroup.admin = $1
                     AND taskgroup.contest = $2
                     ORDER BY usergroup.id, student.id, taskgroup.id ASC";
        let gradeinfo =
            self.query_map_many(query, &[&session_id, &contest_id], |row| {
                    (Grade { taskgroup: row.get(0), user: row.get(1), grade: row.get(2), validated: row.get(3) },
                     Group { id: Some(row.get(4)),
                             name: row.get(5),
                             groupcode: row.get(6),
                             tag: row.get(7),
                             admin: session_id,
                             members: Vec::new() },
                     UserInfo { id: row.get(8),
                                username: row.get(9),
                                logincode: row.get(10),
                                firstname: row.get(11),
                                lastname: row.get(12) })
                })
                .unwrap();
        let mut gradeinfo_iter = gradeinfo.iter();
526
527

        if let Some(t /*Ok((grade, mut group, mut userinfo))*/) = gradeinfo_iter.next() {
528
            let (grade, group, userinfo) = t;
529
530
531
532
533
534

            let mut grades: Vec<Grade> = vec![Default::default(); n_tasks];
            let mut users: Vec<(UserInfo, Vec<Grade>)> = Vec::new();
            let mut groups: Vec<(Group, Vec<(UserInfo, Vec<Grade>)>)> = Vec::new();

            let index = grade.taskgroup;
535
            grades[taskindex[&index]] = *grade;
536
537
538
539
540
541

            // TODO: does
            // https://stackoverflow.com/questions/29859892/mutating-an-item-inside-of-nested-loops
            // help to spare all these clones?

            for ggu in gradeinfo_iter {
542
543
544
545
546
547
548
549
550
551
                let (g, gr, ui) = ggu;
                if gr.id != group.id {
                    users.push((userinfo.clone(), grades));
                    grades = vec![Default::default(); n_tasks];

                    groups.push((group.clone(), users));
                    users = Vec::new();
                } else if ui.id != userinfo.id {
                    users.push((userinfo.clone(), grades));
                    grades = vec![Default::default(); n_tasks];
552
                }
553
                let index = g.taskgroup;
554
                grades[taskindex[&index]] = *g;
555
            }
556
557
            users.push((userinfo.clone(), grades));
            groups.push((group.clone(), users));
558
559
560
561
562
563
564

            (tasknames.iter().map(|(_, name)| name.clone()).collect(), groups)
        } else {
            (Vec::new(), Vec::new()) // should those be default filled?
        }
    }
    fn get_contest_user_grades(&self, session_token: &str, contest_id: i32) -> Vec<Grade> {
565
566
567
568
        let query = "SELECT id, name
                     FROM taskgroup
                     WHERE contest = $1
                     ORDER BY id ASC";
569
570
        let tasknames: Vec<(i32, String)> =
            self.query_map_many(query, &[&contest_id], |row| (row.get(0), row.get(1))).unwrap();
571
572
573
574
575
576
577
        let mut taskindex: ::std::collections::BTreeMap<i32, usize> = ::std::collections::BTreeMap::new();

        let n_tasks = tasknames.len();
        for (index, (i, _)) in tasknames.iter().enumerate() {
            taskindex.insert(*i, index);
        }

578
579
580
581
582
583
584
585
586
587
588
589
590
591
        let query = "SELECT grade.taskgroup, grade.session, grade.grade, grade.validated
                     FROM grade
                     JOIN taskgroup ON grade.taskgroup = taskgroup.id
                     JOIN session ON session.id = grade.session
                     WHERE session.session_token = $1
                     AND taskgroup.contest = $2
                     ORDER BY taskgroup.id ASC";
        let gradeinfo =
            self.query_map_many(query, &[&session_token, &contest_id], |row| Grade { taskgroup: row.get(0),
                                                                                     user: row.get(1),
                                                                                     grade: row.get(2),
                                                                                     validated: row.get(3) })
                .unwrap();
        let gradeinfo_iter = gradeinfo.iter();
592
593
594
595
596

        let mut grades: Vec<Grade> = vec![Default::default(); n_tasks];

        for g in gradeinfo_iter {
            let index = g.taskgroup;
597
            grades[taskindex[&index]] = *g;
598
599
600
601
602
603
        }

        grades
    }

    fn get_taskgroup_user_grade(&self, session_token: &str, taskgroup_id: i32) -> Grade {
604
        let query = "SELECT grade.taskgroup, grade.session, grade.grade, grade.validated
605
606
607
608
                     FROM grade
                     JOIN session ON session.id = grade.session
                     WHERE session.session_token = $1
                     AND grade.taskgroup = $2";
609
610
611
612
613
614
        self.query_map_one(query, &[&session_token, &taskgroup_id], |row| Grade { taskgroup: row.get(0),
                                                                                  user: row.get(1),
                                                                                  grade: row.get(2),
                                                                                  validated: row.get(3) })
            .unwrap_or(None)
            .unwrap_or_default()
615
616
617
    }

    fn get_contest_list(&self) -> Vec<Contest> {
618
619
620
        let query = "SELECT id, location, filename, name, duration, public, start_date, end_date
                     FROM contest
                     ORDER BY id";
621
622
623
624
625
626
627
628
629
630
        self.query_map_many(query, &[], |row| Contest { id: Some(row.get(0)),
                                                        location: row.get(1),
                                                        filename: row.get(2),
                                                        name: row.get(3),
                                                        duration: row.get(4),
                                                        public: row.get(5),
                                                        start: row.get(6),
                                                        end: row.get(7),
                                                        taskgroups: Vec::new() })
            .unwrap()
631
632
633
    }

    fn get_contest_by_id(&self, contest_id: i32) -> Contest {
634
635
636
        let query = "SELECT location, filename, name, duration, public, start_date, end_date
                     FROM contest
                     WHERE id = $1";
637
638
639
640
641
642
643
644
645
        self.query_map_one(query, &[&contest_id], |row| Contest { id: Some(contest_id),
                                                                  location: row.get(0),
                                                                  filename: row.get(1),
                                                                  name: row.get(2),
                                                                  duration: row.get(3),
                                                                  public: row.get(4),
                                                                  start: row.get(5),
                                                                  end: row.get(6),
                                                                  taskgroups: Vec::new() })
646
647
648
649
650
            .unwrap()
            .unwrap() // TODO: Should return Option?
    }

    fn get_contest_by_id_complete(&self, contest_id: i32) -> Contest {
651
652
653
654
655
656
657
        let query = "SELECT contest.location, contest.filename, contest.name, contest.duration, contest.public,
                            contest.start_date, contest.end_date, taskgroup.id, taskgroup.name, task.id, task.location,
                            task.stars
                     FROM contest
                     JOIN taskgroup ON contest.id = taskgroup.contest
                     JOIN task ON taskgroup.id = task.taskgroup
                     WHERE contest.id = $1
658
                     ORDER BY taskgroup.positionalnumber";
659
660
661
662
663
664
665
666
667
668
669
        let taskgroupcontest =
            self.query_map_many(query, &[&contest_id], |row| {
                    (Contest { id: Some(contest_id),
                               location: row.get(0),
                               filename: row.get(1),
                               name: row.get(2),
                               duration: row.get(3),
                               public: row.get(4),
                               start: row.get(5),
                               end: row.get(6),
                               taskgroups: Vec::new() },
670
671
672
673
674
                     Taskgroup { id: Some(row.get(7)),
                                 contest: contest_id,
                                 name: row.get(8),
                                 positionalnumber: None,
                                 tasks: Vec::new() },
675
676
677
678
                     Task { id: Some(row.get(9)), taskgroup: row.get(7), location: row.get(10), stars: row.get(11) })
                })
                .unwrap();
        let mut taskgroupcontest_iter = taskgroupcontest.into_iter();
679
680
681
682

        let (mut contest, mut taskgroup, task) = taskgroupcontest_iter.next().unwrap();
        taskgroup.tasks.push(task);
        for tgc in taskgroupcontest_iter {
683
684
685
686
            let (_, tg, t) = tgc;
            if tg.id != taskgroup.id {
                contest.taskgroups.push(taskgroup);
                taskgroup = tg;
687
            }
688
            taskgroup.tasks.push(t);
689
690
691
692
693
694
        }
        contest.taskgroups.push(taskgroup);
        contest
    }

    fn get_contest_by_id_partial(&self, contest_id: i32) -> Contest {
695
696
697
698
699
        let query = "SELECT contest.location, contest.filename, contest.name, contest.duration, contest.public,
                            contest.start_date, contest.end_date, taskgroup.id, taskgroup.name
                     FROM contest
                     JOIN taskgroup ON contest.id = taskgroup.contest
                     WHERE contest.id = $1";
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
        let taskgroupcontest = self.query_map_many(query, &[&contest_id], |row| {
                                       (Contest { id: Some(contest_id),
                                                  location: row.get(0),
                                                  filename: row.get(1),
                                                  name: row.get(2),
                                                  duration: row.get(3),
                                                  public: row.get(4),
                                                  start: row.get(5),
                                                  end: row.get(6),
                                                  taskgroups: Vec::new() },
                                        Taskgroup { id: Some(row.get(7)),
                                                    contest: contest_id,
                                                    name: row.get(8),
                                                    positionalnumber: None,
                                                    tasks: Vec::new() })
                                   })
                                   .unwrap();
717
        let mut taskgroupcontest_iter = taskgroupcontest.into_iter();
718
719
720
721

        let (mut contest, taskgroup) = taskgroupcontest_iter.next().unwrap();
        contest.taskgroups.push(taskgroup);
        for tgc in taskgroupcontest_iter {
722
723
            let (_, tg) = tgc;
            contest.taskgroups.push(tg);
724
725
726
727
728
        }
        contest
    }

    fn get_participation(&self, session: &str, contest_id: i32) -> Option<Participation> {
729
730
731
732
733
        let query = "SELECT session, start_date
                     FROM participation
                     JOIN session ON session.id = session
                     WHERE session.session_token = $1
                     AND contest = $2";
734
735
736
737
        self.query_map_one(query, &[&session, &contest_id], |row| Participation { contest: contest_id,
                                                                                  user: row.get(0),
                                                                                  start: row.get(1) })
            .ok()?
738
739
    }
    fn new_participation(&self, session: &str, contest_id: i32) -> Result<Participation, ()> {
740
741
742
743
744
        let query = "SELECT session, start_date
                     FROM participation
                     JOIN session ON session.id = session
                     WHERE session.session_token = $1
                     AND contest = $2";
745
746
        match self.query_map_one(query, &[&session, &contest_id], |_| {}).map_err(|_| ())? {
            Some(()) => Err(()),
747
748
749
            None => {
                let now = time::get_time();
                self.execute(
750
                             "INSERT INTO participation (contest, session, start_date)
751
                     SELECT $1, id, $2 FROM session WHERE session_token = $3",
752
753
754
                             &[&contest_id, &now, &session],
                )
                    .unwrap();
755
756
757
758
759
760

                Ok(self.get_participation(session, contest_id).unwrap()) // TODO: This errors if not logged in …
            }
        }
    }
    fn get_task_by_id(&self, task_id: i32) -> Task {
761
762
763
        let query = "SELECT location, stars, taskgroup
                     FROM task
                     WHERE id = $1";
764
765
766
767
        self.query_map_one(query, &[&task_id], |row| Task { id: Some(task_id),
                                                            taskgroup: row.get(2),
                                                            location: row.get(0),
                                                            stars: row.get(1) })
768
769
770
771
            .unwrap()
            .unwrap()
    }
    fn get_task_by_id_complete(&self, task_id: i32) -> (Task, Taskgroup, Contest) {
772
773
774
775
776
777
778
        let query = "SELECT task.location, task.stars, taskgroup.id, taskgroup.name, contest.id, contest.location,
                            contest.filename, contest.name, contest.duration, contest.public, contest.start_date,
                            contest.end_date
                     FROM contest
                     JOIN taskgroup ON taskgroup.contest = contest.id
                     JOIN task ON task.taskgroup = taskgroup.id
                     WHERE task.id = $1";
779
780
        self.query_map_one(query, &[&task_id], |row| {
                (Task { id: Some(task_id), taskgroup: row.get(2), location: row.get(0), stars: row.get(1) },
781
782
783
784
785
                 Taskgroup { id: Some(row.get(2)),
                             contest: row.get(4),
                             name: row.get(3),
                             positionalnumber: None,
                             tasks: Vec::new() },
786
787
788
789
790
791
792
793
794
795
796
797
                 Contest { id: Some(row.get(4)),
                           location: row.get(5),
                           filename: row.get(6),
                           name: row.get(7),
                           duration: row.get(8),
                           public: row.get(9),
                           start: row.get(10),
                           end: row.get(11),
                           taskgroups: Vec::new() })
            })
            .unwrap()
            .unwrap()
798
799
800
801
    }

    fn get_submission_to_validate(&self, tasklocation: &str, subtask: Option<&str>) -> i32 {
        match subtask {
802
            Some(st) => {
803
804
805
806
807
808
809
                let query = "SELECT id
                             FROM submission
                             JOIN task ON submission.task = task.id
                             WHERE task.location = $1
                             AND subtask_identifier = $2
                             AND needs_validation = 1
                             LIMIT 1";
810
811
812
                self.query_map_one(query, &[&tasklocation, &st], |row| row.get(0)).unwrap().unwrap()
            }
            None => {
813
814
815
816
817
818
                let query = "SELECT id
                             FROM submission
                             JOIN task ON submission.task = task.id
                             WHERE task.location = $1
                             AND needs_validation = 1
                             LIMIT 1";
819
820
                self.query_map_one(query, &[&tasklocation], |row| row.get(0)).unwrap().unwrap()
            }
821
822
823
824
        }
    }

    fn find_next_submission_to_validate(&self, userid: i32, taskgroupid: i32) {
825
826
827
828
829
830
831
        let query = "SELECT id, validated
                     FROM submission
                     JOIN task ON submission.task = task.id
                     WHERE task.taskgroup = $1
                     AND submission.session = $2
                     ORDER BY value DESC id DESC
                     LIMIT 1";
832
833
        let (id, validated): (i32, bool) =
            self.query_map_one(query, &[&taskgroupid, &userid], |row| (row.get(0), row.get(1))).unwrap().unwrap();
834
        if !validated {
835
836
837
            let query = "UPDATE submission
                         SET needs_validation = 1
                         WHERE id = $1";
838
            self.execute(query, &[&id]).unwrap();
839
840
841
842
843
844
        }
    }

    fn add_group(&self, group: &mut Group) { group.save(self); }

    fn get_groups(&self, session_id: i32) -> Vec<Group> {
845
846
847
        let query = "SELECT id, name, groupcode, tag
                     FROM usergroup
                     WHERE admin = $1";
848
849
850
851
852
853
        self.query_map_many(query, &[&session_id], |row| Group { id: Some(row.get(0)),
                                                                 name: row.get(1),
                                                                 groupcode: row.get(2),
                                                                 tag: row.get(3),
                                                                 admin: session_id,
                                                                 members: Vec::new() })
854
855
856
857
858
859
            .unwrap()
    }
    fn get_groups_complete(&self, _session_id: i32) -> Vec<Group> {
        unimplemented!();
    }
    fn get_group_complete(&self, group_id: i32) -> Option<Group> {
860
861
862
        let query = "SELECT name, groupcode, tag, admin
                     FROM usergroup
                     WHERE id  = $1";
863
864
865
866
867
868
        let mut group = self.query_map_one(query, &[&group_id], |row| Group { id: Some(group_id),
                                                                              name: row.get(0),
                                                                              groupcode: row.get(1),
                                                                              tag: row.get(2),
                                                                              admin: row.get(3),
                                                                              members: Vec::new() })
869
870
871
                            .unwrap()
                            .unwrap(); // TODO handle error

872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
        let query = "SELECT id, session_token, csrf_token, last_login, last_activity, permanent_login, username,
                            password, logincode, email, email_unconfirmed, email_confirmationcode, firstname, lastname,
                            street, zip, city, nation, grade, is_teacher, oauth_provider, oauth_foreign_id, salt
                     FROM session
                     WHERE managed_by = $1";
        group.members = self.query_map_many(query, &[&group_id], |row| SessionUser { id: row.get(0),
                                                                                     session_token: row.get(1),
                                                                                     csrf_token: row.get(2),
                                                                                     last_login: row.get(3),
                                                                                     last_activity: row.get(4),
                                                                                     permanent_login: row.get(5),

                                                                                     username: row.get(6),
                                                                                     password: row.get(7),
                                                                                     salt: row.get(22),
                                                                                     logincode: row.get(8),
                                                                                     email: row.get(9),
                                                                                     email_unconfirmed: row.get(10),
                                                                                     email_confirmationcode:
                                                                                         row.get(11),

                                                                                     firstname: row.get(12),
                                                                                     lastname: row.get(13),
                                                                                     street: row.get(14),
                                                                                     zip: row.get(15),
                                                                                     city: row.get(16),
                                                                                     nation: row.get(17),
                                                                                     grade: row.get(18),

                                                                                     is_teacher: row.get(19),
                                                                                     managed_by: Some(group_id),

                                                                                     oauth_provider: row.get(20),
                                                                                     oauth_foreign_id: row.get(21) })
                            .unwrap();
907
908
        Some(group)
    }
909

910
    fn reset_all_contest_visibilities(&self) { self.execute("UPDATE contest SET public = $1", &[&false]).unwrap(); }
911
912
913
914
}

impl MedalObject<Connection> for Task {
    fn save(&mut self, conn: &Connection) {
915
916
917
918
        let query = "SELECT id
                     FROM task
                     WHERE taskgroup = $1
                     AND location = $2";
919
920
        conn.query_map_one(query, &[&self.taskgroup, &self.location], |row| row.get(0))
            .unwrap_or(None)
921
922
923
924
925
926
927
928
            .and_then(|id| {
                self.set_id(id);
                Some(())
            })
            .unwrap_or(()); // Err means no entry yet and is expected result

        let id = match self.get_id() {
            Some(id) => {
929
930
931
                let query = "UPDATE task
                             SET taskgroup = $1, location = $2, stars = $3
                             WHERE id = $4";
932
                conn.execute(query, &[&self.taskgroup, &self.location, &self.stars, &id]).unwrap();
933
934
935
                id
            }
            None => {
936
937
                let query = "INSERT INTO task (taskgroup, location, stars)
                             VALUES ($1, $2, $3)";
938
939
                conn.execute(query, &[&self.taskgroup, &self.location, &self.stars]).unwrap();
                conn.get_last_id().unwrap()
940
941
942
943
944
945
946
947
            }
        };
        self.set_id(id);
    }
}

impl MedalObject<Connection> for Taskgroup {
    fn save(&mut self, conn: &Connection) {
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
        if let Some(first_task) = self.tasks.get(0) {
            let query = "SELECT taskgroup.id
                         FROM taskgroup
                         JOIN task
                         ON task.taskgroup = taskgroup.id
                         WHERE contest = $1
                         AND task.location = $2";
            conn.query_map_one(query, &[&self.contest, &first_task.location], |row| row.get(0))
                .unwrap_or(None)
                .and_then(|id| {
                    self.set_id(id);
                    Some(())
                })
                .unwrap_or(()); // Err means no entry yet and is expected result
        }
963
964
965

        let id = match self.get_id() {
            Some(id) => {
966
                let query = "UPDATE taskgroup
967
968
969
                             SET contest = $1, name = $2, positionalnumber = $3
                             WHERE id = $4";
                conn.execute(query, &[&self.contest, &self.name, &self.positionalnumber, &id]).unwrap();
970
971
972
                id
            }
            None => {
973
974
975
                let query = "INSERT INTO taskgroup (contest, name, positionalnumber)
                             VALUES ($1, $2, $3)";
                conn.execute(query, &[&self.contest, &self.name, &self.positionalnumber]).unwrap();
976
                conn.get_last_id().unwrap()
977
978
979
980
981
982
983
984
985
986
987
988
            }
        };
        self.set_id(id);
        for mut task in &mut self.tasks {
            task.taskgroup = id;
            task.save(conn);
        }
    }
}

impl MedalObject<Connection> for Contest {
    fn save(&mut self, conn: &Connection) {
989
990
991
992
        let query = "SELECT id
                     FROM contest
                     WHERE location = $1
                     AND filename = $2";
993
994
        conn.query_map_one(query, &[&self.location, &self.filename], |row| row.get(0))
            .unwrap_or(None)
995
996
997
998
999
1000
            .and_then(|id| {
                self.set_id(id);
                Some(())
            })
            .unwrap_or(()); // Err means no entry yet and is expected result

1001
1002
        let id = match self.get_id() {
            Some(id) => {
1003
1004
1005
                let query = "UPDATE contest
                             SET location = $1,filename = $2, name = $3, duration = $4, public = $5, start_date = $6, end_date = $7
                             WHERE id = $8";
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
                conn.execute(query,
                             &[&self.location,
                               &self.filename,
                               &self.name,
                               &self.duration,
                               &self.public,
                               &self.start,
                               &self.end,
                               &id])
                    .unwrap();
                id
            }
            None => {
1019
1020
                let query = "INSERT INTO contest (location, filename, name, duration, public, start_date, end_date)
                             VALUES ($1, $2, $3, $4, $5, $6, $7)";
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
                conn.execute(query,
                             &[&self.location,
                               &self.filename,
                               &self.name,
                               &self.duration,
                               &self.public,
                               &self.start,
                               &self.end])
                    .unwrap();
                conn.get_last_id().unwrap()
            }
        };
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
        self.set_id(id);
        for mut taskgroup in &mut self.taskgroups {
            taskgroup.contest = id;
            taskgroup.save(conn);
        }
    }
}

impl MedalObject<Connection> for Grade {
    fn save(&mut self, conn: &Connection) {
1043
1044
1045
        let query = "INSERT INTO grade (taskgroup, session, grade, validated)
                     VALUES ($1, $2, $3, $4)
                     ON CONFLICT ON CONSTRAINT grade_pkey DO UPDATE SET grade = excluded.grade, validated = excluded.validated";
1046
        conn.execute(query, &[&self.taskgroup, &self.user, &self.grade, &self.validated]).unwrap();
1047
1048
1049
1050
1051
    }
}

impl MedalObject<Connection> for Participation {
    fn save(&mut self, conn: &Connection) {
1052
1053
        let query = "INSERT INTO participation (contest, session, start_date)
                     VALUES ($1, $2, $3)";
1054
        conn.execute(query, &[&self.contest, &self.user, &self.start]).unwrap();
1055
1056
1057
1058
1059
1060
1061
1062
    }
}

impl MedalObject<Connection> for Submission {
    fn save(&mut self, conn: &Connection) {
        match self.get_id() {
            Some(_id) => unimplemented!(),
            None => {
1063
                let query = "INSERT INTO submission (task, session, grade, validated, nonvalidated_grade,
1064
                                                     subtask_identifier, value, date, needs_validation)
1065
                             VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)";
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
                conn.execute(query,
                             &[&self.task,
                               &self.session_user,
                               &self.grade,
                               &self.validated,
                               &self.nonvalidated_grade,
                               &self.subtask_identifier,
                               &self.value,
                               &self.date,
                               &self.needs_validation])
                    .unwrap();
                self.set_id(conn.get_last_id().unwrap());
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
            }
        }
    }
}

impl MedalObject<Connection> for Group {
    fn save(&mut self, conn: &Connection) {
        match self.get_id() {
            Some(_id) => unimplemented!(),
            None => {
1088
1089
                let query = "INSERT INTO usergroup (name, groupcode, tag, admin)
                             VALUES ($1, $2, $3, $4)";
1090
1091
                conn.execute(query, &[&self.name, &self.groupcode, &self.tag, &self.admin]).unwrap();
                self.set_id(conn.get_last_id().unwrap());
1092
1093
1094
1095
            }
        }
    }
}