Add usefulness rating function to url titles

1 files changed, 71 insertions, 35 deletions

diff --git a/src/utils.rs b/src/utils.rs
index b6c4cf4..6614095 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,49 +1,85 @@
-use std::str;
+use std::borrow::Cow;
 use std::io::{self, Read};
 
 use reqwest::Client;
 use reqwest::header::Connection;
 
-use failure::ResultExt;
 use self::error::{DownloadError, ErrorKind};
+use failure::ResultExt;
+
+#[derive(Clone, Debug)]
+pub struct Url<'a> {
+    url: Cow<'a, str>,
+    max_kib: Option<usize>,
+}
+
+impl<'a> From<String> for Url<'a> {
+    fn from(url: String) -> Self {
+        Url {
+            url: Cow::from(url),
+            max_kib: None,
+        }
+    }
+}
+
+impl<'a> From<&'a str> for Url<'a> {
+    fn from(url: &'a str) -> Self {
+        Url {
+            url: Cow::from(url),
+            max_kib: None,
+        }
+    }
+}
+
+impl<'a> Url<'a> {
+    pub fn max_kib(mut self, limit: usize) -> Self {
+        self.max_kib = Some(limit);
+        self
+    }
+
+    /// Downloads the file and converts it to a String.
+    /// Any invalid bytes are converted to a replacement character.
+    ///
+    /// The error indicated either a failed download or
+    /// that the limit set by max_kib() was reached.
+    pub fn request(&self) -> Result<String, DownloadError> {
+        let mut response = Client::new()
+            .get(self.url.as_ref())
+            .header(Connection::close())
+            .send()
+            .context(ErrorKind::Connection)?;
 
-/// Downloads the file and converts it to a String.
-/// Any invalid bytes are converted to a replacement character.
-///
-/// The error indicated either a failed download or that the DownloadLimit was reached
-pub fn download(url: &str, max_kib: Option<usize>) -> Result<String, DownloadError> {
-    let mut response = Client::new()
-        .get(url)
-        .header(Connection::close())
-        .send()
-        .context(ErrorKind::Connection)?;
-
-    // 100 kibibyte buffer
-    let mut buf = [0; 100 * 1024];
-    let mut written = 0;
-    let mut bytes = Vec::new();
-
-    // Read until we reach EOF or max_kib KiB
-    loop {
-        let len = match response.read(&mut buf) {
-            Ok(0) => break,
-            Ok(len) => len,
-            Err(ref e) if e.kind() == io::ErrorKind::Interrupted => continue,
-            Err(e) => Err(e).context(ErrorKind::Read)?,
-        };
-
-        bytes.extend_from_slice(&buf[..len]);
-        written += len;
-
-        // Check if the file is too large to download
-        if let Some(max_kib) = max_kib {
-            if written > max_kib * 1024 {
-                Err(ErrorKind::DownloadLimit)?;
+        // 100 kibibyte buffer
+        let mut buf = [0; 100 * 1024];
+        let mut written = 0;
+        let mut bytes = Vec::new();
+
+        // Read until we reach EOF or max_kib KiB
+        loop {
+            let len = match response.read(&mut buf) {
+                Ok(0) => break,
+                Ok(len) => len,
+                Err(ref e) if e.kind() == io::ErrorKind::Interrupted => continue,
+                Err(e) => Err(e).context(ErrorKind::Read)?,
+            };
+
+            bytes.extend_from_slice(&buf[..len]);
+            written += len;
+
+            // Check if the file is too large to download
+            if let Some(max_kib) = self.max_kib {
+                if written > max_kib * 1024 {
+                    Err(ErrorKind::DownloadLimit)?;
+                }
             }
         }
+
+        Ok(String::from_utf8_lossy(&bytes).into_owned())
     }
 
-    Ok(String::from_utf8_lossy(&bytes).into_owned())
+    pub fn as_str(&self) -> &str {
+        &self.url
+    }
 }
 
 pub mod error {