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use std::collections::HashMap;
use std::fs::File;
use anyhow::{Error, Result, Context, anyhow, bail};
use mobc_redis::redis;
use mobc_redis::redis::AsyncCommands;
use serde::{Serialize, Deserialize};
use serde_json::json;
#[derive(Default, Serialize, Deserialize)]
struct PyindieblogData {
posts: Vec<serde_json::Value>,
cards: Vec<serde_json::Value>
}
#[async_std::main]
async fn main() -> Result<()> {
let mut args = std::env::args();
args.next(); // skip argv[0] which is the name
let redis_uri = args.next().ok_or(anyhow!("No Redis URI provided"))?;
let client = redis::Client::open(redis_uri.as_str()).with_context(|| format!("Failed to construct Redis client on {}", redis_uri))?;
let filename = args.next().ok_or(anyhow!("No filename provided for export"))?;
let mut data: Vec<serde_json::Value>;
let file = File::create(filename)?;
let mut conn = client.get_async_std_connection().await.with_context(|| "Failed to connect to the Redis server")?;
data = conn.hgetall::<&str, HashMap<String, String>>("posts").await?
.values()
.map(|s| serde_json::from_str::<serde_json::Value>(s)
.with_context(|| format!("Failed to parse the following entry: {:?}", s)))
.collect::<std::result::Result<Vec<serde_json::Value>, anyhow::Error>>()
.with_context(|| "Failed to export h-entries from pyindieblog")?;
data.extend(conn.hgetall::<&str, HashMap<String, String>>("hcards").await?
.values()
.map(|s| serde_json::from_str::<serde_json::Value>(s)
.with_context(|| format!("Failed to parse the following card: {:?}", s)))
.collect::<std::result::Result<Vec<serde_json::Value>, anyhow::Error>>()
.with_context(|| "Failed to export h-cards from pyindieblog")?);
data.sort_by_key(|v| v["properties"]["published"][0].as_str().map(|s| s.to_string()));
serde_json::to_writer(file, &data)?;
Ok(())
}
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