add fzf integration

cli/src/commands/list.rs

@@ -1,5 +1,9 @@
-use anyhow::Result;
+use anyhow::{Context, Result};
 use reqwest::Client;
+use std::{
+    io::Write,
+    process::{Command, Stdio},
+};
 
 use crate::util::IntoTableRow;
 use jm_client_core::util::{self, api, MemeSorting};
@@ -9,6 +13,7 @@ pub async fn run(
     cat: Option<String>,
     user: Option<String>,
     sorting: Option<MemeSorting>,
+    fzf: bool,
 ) -> Result<()> {
     // This needs to be done so both users, memes and categories will be requested
     // at once
@@ -42,11 +47,41 @@ pub async fn run(
 
     let mut table = crate::util::list_table();
 
-    for m in memes {
+    for m in memes.iter() {
         table.add_row(m.into_table_row());
     }
 
-    println!("{}", table.render());
+    let table_str = table.render();
+
+    if fzf {
+        let mut child = Command::new("fzf")
+            .args(&["--delimiter", "\\t", "--with-nth", "2"])
+            .stdout(Stdio::piped())
+            .stdin(Stdio::piped())
+            .spawn()
+            .context("Failed to spawn FZF")?;
+        let stdin = child.stdin.as_mut().context("could not get FZF stdin")?;
+
+        for (idx, line) in table_str.lines().enumerate() {
+            stdin
+                .write(format!("{}\t{}\n", idx, line).as_bytes())
+                .context("Failed to write to FZF")?;
+        }
+
+        let out = child.wait_with_output()?;
+        let out_str = String::from_utf8(out.stdout).context("FZF output is invalid UTF-8")?;
+        let idx = out_str
+            .split('\t')
+            .next()
+            .and_then(|s| s.parse::<usize>().ok())
+            .context("Failed to parse FZF output")?;
+        let meme = memes
+            .get(idx)
+            .context("Falied to retrieve meme FZF returned")?;
+        println!("{}", meme.link);
+    } else {
+        println!("{}", table_str);
+    }
 
     Ok(())
 }

cli/src/main.rs

@@ -64,7 +64,7 @@ enum Cmd {
         cat: bool,
     },
 
-    #[structopt(about = "lists all memes")]
+    #[structopt(about = "lists all memes", alias = "l")]
     List {
         #[structopt(long, short, help = "filter by category")]
         category: Option<String>,
@@ -78,6 +78,9 @@ enum Cmd {
             help = "how to sort the results. can be id, user, category or link"
         )]
         sort: Option<MemeSorting>,
+
+        #[structopt(long, short, help = "search memes with FZF")]
+        fzf: bool,
     },
 
     #[structopt(about = "Lists all users")]
@@ -114,7 +117,8 @@ async fn main() -> Result<()> {
             category,
             user,
             sort,
-        } => commands::list::run(&http, category, user, sort).await?,
+            fzf,
+        } => commands::list::run(&http, category, user, sort, fzf).await?,
         Cmd::Users => commands::users::run(&http).await?,
     }