1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

use crate::*;

use ipfs_api_backend_hyper::TryFromUri;
use ipfs_api_backend_hyper::{IpfsApi, IpfsClient};
use ipfs_api_prelude::Backend;
use serde::{Deserialize, Serialize};
use serde_json;

use futures::TryStreamExt;

use std::default::Default;
use std::io::Cursor;
use std::result::Result;

pub struct IpfsManager {
    client: IpfsClient,
}

impl IpfsManager {
    pub fn new(ipfs_url: &str, ipfs_username: &str, ipfs_password: &str) -> Self {
        Self {
            client: IpfsClient::from_str(ipfs_url)
                .unwrap()
                .with_credentials(ipfs_username, ipfs_password),
        }
    }

    pub async fn get_object<T>(&self, cid: &str) -> Result<T, SbError>
    where
        T: for<'a> Deserialize<'a> + Default,
    {
        match self
            .client
            .get(cid)
            .map_ok(|chunk| chunk.to_vec())
            .try_concat()
            .await
        {
            Ok(res) => serde_json::from_slice(&res).map_err(|_| SbError::IpfsParseError),
            Err(e) => Err(SbError::CustomError {
                message: "Failed to fetch IPFS object".to_string(),
                source: std::sync::Arc::new(e),
            }),
        }
    }

    pub async fn set_object<T>(&self, my_object: T) -> Result<String, SbError>
    where
        T: Serialize + Default,
    {
        let content = serde_json::to_string(&my_object).map_err(|_| SbError::IpfsParseError)?;
        let content = content.as_bytes().to_vec();
        let cursor = Cursor::new(content);

        match self.client.add(cursor).await {
            Ok(add_result) => Ok(add_result.hash),
            Err(_) => Err(SbError::IpfsNetworkError),
        }
    }
}