Решение на упр.03 задача 3 от Илиян Гаврилов
Резултати
- 2 точки от тестове
- 0 бонус точки
- 2 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::collections::HashMap;
enum Event {
Login {
user: String,
timestamp: u64
},
Logout {
user: String,
timestamp: u64
},
Purchase {
user: String,
item: String,
amount: f64,
timestamp: u64
},
Error {
code: i32,
message: String,
timestamp: u64
}
}
struct EventLog {
events: Vec<Event>
}
fn matches_user(event_user: &str, user_filter: Option<&str>) -> bool {
match user_filter {
Some(u) => event_user == u,
None => true,
}
}
fn after_timestamp(timestamp: &u64, after_filter: Option<u64>) -> bool {
match after_filter {
Some(t) => *timestamp > t,
None => true,
}
}
fn filter(event: &Event, user: Option<&str>, after: Option<u64>) -> bool {
let timestamp = match event {
Event::Login { timestamp, .. }
| Event::Logout { timestamp, .. }
| Event::Purchase { timestamp, .. }
| Event::Error { timestamp, .. } => timestamp,
};
match event {
Event::Login { user: event_user, .. }
| Event::Logout { user: event_user, .. }
| Event::Purchase { user: event_user, .. } => {
matches_user(event_user, user) && after_timestamp(timestamp, after)
}
Event::Error { .. } => user.is_none() && after_timestamp(timestamp, after),
}
}
impl EventLog {
fn new() -> EventLog {
return EventLog { events: (Vec::new()) };
}
fn add_event(&mut self, event: Event) {
self.events.push(event);
}
fn user_spent(&self, user: &str) -> f64 {
let mut sum = 0.0;
for event in self.events.iter() {
if let Event::Purchase { user: event_user, item: _item,
amount, timestamp: _timestamp } = event {
if event_user.as_str() == user {
sum += amount;
}
}
}
sum
}
fn summaries_by_type(&self) -> HashMap<String, usize> {
let mut result: HashMap<String, usize> = HashMap::new();
for event in self.events.iter() {
match event {
Event::Login { .. } => {
*result.entry("Login".to_string()).or_insert(0) += 1;
}
Event::Logout { .. } => {
*result.entry("Logout".to_string()).or_insert(0) += 1;
}
Event::Purchase { .. } => {
*result.entry("Purchase".to_string()).or_insert(0) += 1;
}
Event::Error { .. } => {
*result.entry("Error".to_string()).or_insert(0) += 1;
}
}
}
result
}
fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
self.events.iter()
.filter(|event| filter(event, user, after))
.collect()
}
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling quote v1.0.41
Compiling unicode-ident v1.0.22
Compiling futures-sink v0.3.31
Compiling futures-core v0.3.31
Compiling futures-channel v0.3.31
Compiling slab v0.4.11
Compiling syn v2.0.108
Compiling pin-project-lite v0.2.16
Compiling pin-utils v0.1.0
Compiling futures-io v0.3.31
Compiling futures-task v0.3.31
Compiling memchr v2.7.6
Compiling solution v0.1.0 (/tmp/d20251030-1757769-1dyo9qx/solution)
warning: enum `Event` is never used
--> src/lib.rs:3:6
|
3 | enum Event {
| ^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: struct `EventLog` is never constructed
--> src/lib.rs:25:8
|
25 | struct EventLog {
| ^^^^^^^^
warning: function `matches_user` is never used
--> src/lib.rs:29:4
|
29 | fn matches_user(event_user: &str, user_filter: Option<&str>) -> bool {
| ^^^^^^^^^^^^
warning: function `after_timestamp` is never used
--> src/lib.rs:36:4
|
36 | fn after_timestamp(timestamp: &u64, after_filter: Option<u64>) -> bool {
| ^^^^^^^^^^^^^^^
warning: function `filter` is never used
--> src/lib.rs:43:4
|
43 | fn filter(event: &Event, user: Option<&str>, after: Option<u64>) -> bool {
| ^^^^^^
warning: associated items `new`, `add_event`, `user_spent`, `summaries_by_type`, and `filter_events` are never used
--> src/lib.rs:62:6
|
61 | impl EventLog {
| ------------- associated items in this implementation
62 | fn new() -> EventLog {
| ^^^
...
66 | fn add_event(&mut self, event: Event) {
| ^^^^^^^^^
...
70 | fn user_spent(&self, user: &str) -> f64 {
| ^^^^^^^^^^
...
85 | fn summaries_by_type(&self) -> HashMap<String, usize> {
| ^^^^^^^^^^^^^^^^^
...
108 | fn filter_events(&self, user: Option<&str>, after: Option<u64>) -> Vec<&Event> {
| ^^^^^^^^^^^^^
warning: `solution` (lib) generated 6 warnings
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
Finished `test` profile [unoptimized + debuginfo] target(s) in 10.94s
Running tests/solution_test.rs (target/debug/deps/solution_test-bfd50394249726db)
running 2 tests
test solution_test::test_basic ... ok
test solution_test::test_empty ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s