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use anyhow::{anyhow, Context};
use kittybox::database::FileStorage;
use kittybox::database::Storage;
use redis::{self, AsyncCommands};
use std::collections::HashMap;
/// Convert from a Redis storage to a new storage new_storage.
async fn convert_from_redis<S: Storage>(from: String, new_storage: S) -> anyhow::Result<()> {
let db = redis::Client::open(from).context("Failed to open the Redis connection")?;
let mut conn = db
.get_async_std_connection()
.await
.context("Failed to connect to Redis")?;
// Rebinding to convince the borrow checker we're not smuggling stuff outta scope
let storage = &new_storage;
let mut stream = conn.hscan::<_, String>("posts").await?;
while let Some(key) = stream.next_item().await {
let value = serde_json::from_str::<serde_json::Value>(
&stream
.next_item()
.await
.ok_or(anyhow!("Failed to find a corresponding value for the key"))?,
)?;
println!("{}, {:?}", key, value);
if value["see_other"].is_string() {
continue;
}
let user = &(url::Url::parse(value["properties"]["uid"][0].as_str().unwrap())
.unwrap()
.origin()
.ascii_serialization()
.clone()
+ "/");
if let Err(err) = storage.clone().put_post(&value, user).await {
eprintln!("Error saving post: {}", err);
}
}
let mut stream: redis::AsyncIter<String> = conn.scan_match("settings_*").await?;
while let Some(key) = stream.next_item().await {
let mut conn = db
.get_async_std_connection()
.await
.context("Failed to connect to Redis")?;
let user = key.strip_prefix("settings_").unwrap();
match conn
.hgetall::<&str, HashMap<String, String>>(&key)
.await
.context(format!("Failed getting settings from key {}", key))
{
Ok(settings) => {
for (k, v) in settings.iter() {
if let Err(e) = storage
.set_setting(k, user, v)
.await
.with_context(|| format!("Failed setting {} for {}", k, user))
{
eprintln!("{}", e);
}
}
}
Err(e) => {
eprintln!("{}", e);
}
}
}
Ok(())
}
#[async_std::main]
async fn main() -> anyhow::Result<()> {
let mut args = std::env::args();
args.next(); // skip argv[0]
let old_uri = args
.next()
.ok_or_else(|| anyhow!("No import source is provided."))?;
let new_uri = args
.next()
.ok_or_else(|| anyhow!("No import destination is provided."))?;
let storage = if new_uri.starts_with("file:") {
let folder = new_uri.strip_prefix("file://").unwrap();
let path = std::path::PathBuf::from(folder);
Box::new(
FileStorage::new(path)
.await
.context("Failed to construct the file storage")?,
)
} else {
anyhow::bail!("Cannot construct the storage abstraction for destination storage. Check the storage type?");
};
if old_uri.starts_with("redis") {
convert_from_redis(old_uri, *storage).await?
}
Ok(())
}
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