[+] Load thumbnailer

backend/src/thumbnailer.rs

@@ -0,0 +1,40 @@
+use std::collections::HashSet;
+use std::fs;
+use std::fs::File;
+use std::io::{BufRead, BufReader};
+use std::path::Path;
+use anyhow::{bail, Result};
+
+#[derive(Debug)]
+pub struct Thumbnailer {
+    try_exec: String,
+    exec: String,
+    mime_type: HashSet<String>
+}
+
+impl Thumbnailer {
+    /// Load an XDG thumbnailer (examples in /usr/share/thumbnailers)
+    pub fn load(p: &Path) -> Result<Thumbnailer> {
+        let mut content = fs::read_to_string(p)?;
+        content = content.replace("\r\n", "\n");
+        let lines = content.split("\n");
+
+        let mut t = Thumbnailer {
+            try_exec: "".to_string(), exec: "".to_string(), mime_type: HashSet::new()
+        };
+
+        lines.filter(|line| line.contains("="))
+            .for_each(|line| {
+                let sp: Vec<&str> = line.splitn(2, "=").collect();
+                let (key, val) = (sp[0].trim(), sp[1].trim().to_string());
+                match key {
+                    "TryExec" => t.try_exec = val,
+                    "Exec" => t.exec = val,
+                    "MimeType" => t.mime_type = HashSet::from_iter(val.split(";").map(str::to_string)),
+                    _ => {},
+                }
+            });
+
+        Ok(t)
+    }
+}