## commits_stats
### Instructions:
In this exercise you will be provided with a json file `commits.json` with data corresponding to git commits in GitHub (extracted using the GitHub rest API). Your objective is to extract the relevant data and place it in a struct called `CommitData` to get the following information:
1. Number of commits per author (identified by the GitHub login).
2. The number of commits per author.
Create two functions:
- `commits_per_author` : which returns a hash map with the number of commits per author.
- `commits_per_date` : which returns a hash map with the number of commits per week.
- Note: A week is represented by the a year followed by the number of the
week. For example, January 1, 2020 is in week 1 of 2020 and will be
represented by a String with the form "2020-W1".
### Notions:
- [chrono ](https://docs.rs/chrono/0.4.19/chrono )
- [json ](https://docs.rs/json/0.12.4/json/index.html )
### Expected functions
```rust
pub fn commits_per_week(data: & json::JsonValue) -> HashMap< String , u32 > {
}
pub fn commits_per_author(data: & json::JsonValue) -> HashMap< String , u32 > {
}
```
### Usage
Here is a possible test for your function:
```rust
use commits_stats::{commits_per_week, commits_per_author};
fn main() {
let contents = fs::read_to_string("commits.json").unwrap();
let serialized = json::parse(&contents).unwrap();
println!("{:?}", commits_per_week(&serialized));
println!("{:?}", commits_per_author(&serialized));
}
```
And its output:
```console
$ cargo run
{"2020-W44": 5, "2020-W36": 1, "2020-W31": 1, ... ,"2020-W45": 4, "2020-W46": 4}
{"homembaixinho": 2, "mwenzkowski": 3, ... ,"tamirzb": 1, "paul-ri": 2, "RPigott": 1}
$
```
