From a7cceb1aa5afb13de9f51c10670757d39d50e2a3 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Tue, 6 Nov 2018 01:50:59 -0500
Subject: add some basic last.fm api querying

---
 Cargo.lock              | 1167 +++++++++++++++++++++++++++++++++++++++++++++--
 Cargo.toml              |    4 +
 src/lastfm/api_types.rs |   44 ++
 src/lastfm/mod.rs       |  120 +++++
 src/main.rs             |   20 +
 5 files changed, 1310 insertions(+), 45 deletions(-)
 create mode 100644 src/lastfm/api_types.rs
 create mode 100644 src/lastfm/mod.rs

diff --git a/Cargo.lock b/Cargo.lock
index a285a59..79a42c6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,3 +1,16 @@
+[[package]]
+name = "adler32"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "arrayvec"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "backtrace"
 version = "0.3.9"
@@ -19,11 +32,39 @@ dependencies = [
  "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "base64"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "safemem 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "build_const"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "byteorder"
+version = "1.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bytes"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.25"
@@ -34,6 +75,66 @@ name = "cfg-if"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cloudabi"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "core-foundation"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "core-foundation-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crc"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "build_const 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-epoch 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "arrayvec 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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 name = "directories"
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@@ -43,6 +144,19 @@ dependencies = [
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "dtoa"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+name = "encoding_rs"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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@@ -63,20 +177,198 @@ dependencies = [
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+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+[[package]]
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+
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+
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@@ -91,6 +383,23 @@ name = "linked-hash-map"
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+[[package]]
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+
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@@ -100,131 +409,899 @@ dependencies = [
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diff --git a/Cargo.toml b/Cargo.toml
index 4258ca4..4b24c57 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,8 @@ authors = ["Jesse Luehrs <doy@tozt.net>"]
 [dependencies]
 directories = "1.0"
 failure = "0.1"
+reqwest = "0.9"
 rusqlite = "0.15"
+serde = "1.0"
+serde_json = "1.0"
+serde_derive = "1.0"
diff --git a/src/lastfm/api_types.rs b/src/lastfm/api_types.rs
new file mode 100644
index 0000000..28b593a
--- /dev/null
+++ b/src/lastfm/api_types.rs
@@ -0,0 +1,44 @@
+#![allow(non_camel_case_types)]
+
+#[derive(Deserialize)]
+pub struct track_artist {
+    #[serde(rename = "#text")]
+    pub text: String,
+}
+
+#[derive(Deserialize)]
+pub struct track_album {
+    #[serde(rename = "#text")]
+    pub text: String,
+}
+
+#[derive(Deserialize)]
+pub struct track_date {
+    pub uts: String, // no idea why this is a string either
+}
+
+#[derive(Deserialize)]
+pub struct track {
+    pub artist: track_artist,
+    pub name: String,
+    pub album: track_album,
+    pub date: track_date,
+}
+
+#[derive(Deserialize)]
+pub struct recent_tracks_recenttracks_attr {
+    pub total: String, // no idea why this is a string
+}
+
+#[derive(Deserialize)]
+pub struct recent_tracks_recenttracks {
+    pub track: Vec<track>,
+    #[serde(rename = "@attr")]
+    pub attr: recent_tracks_recenttracks_attr,
+}
+
+#[derive(Deserialize)]
+pub struct recent_tracks {
+    pub recenttracks: recent_tracks_recenttracks,
+}
+
diff --git a/src/lastfm/mod.rs b/src/lastfm/mod.rs
new file mode 100644
index 0000000..96f4555
--- /dev/null
+++ b/src/lastfm/mod.rs
@@ -0,0 +1,120 @@
+use failure;
+use reqwest;
+
+use error::Result;
+
+mod api_types;
+
+const API_ROOT: &'static str = "https://ws.audioscrobbler.com/2.0/";
+
+pub struct LastFMClient {
+    client: reqwest::Client,
+    api_key: String,
+    user: String,
+}
+
+pub struct Track {
+    pub artist: String,
+    pub name: String,
+    pub album: String,
+    pub timestamp: i64,
+}
+
+pub struct Tracks<'a> {
+    client: &'a LastFMClient,
+    page: u64,
+    buf: Vec<Track>,
+}
+
+impl<'a> Tracks<'a> {
+    fn new(client: &LastFMClient) -> Tracks {
+        Tracks {
+            client,
+            page: 0,
+            buf: vec![],
+        }
+    }
+
+    fn get_next_page(&mut self) -> Result<()> {
+        self.page += 1;
+
+        let mut res = self.client.client
+            .get(API_ROOT)
+            .query(&[
+                ("method", "user.getrecenttracks"),
+                ("api_key", &self.client.api_key),
+                ("user", &self.client.user),
+                ("format", "json"),
+                ("page", &format!("{}", self.page)),
+                ("limit", "200"),
+            ])
+            .send()?;
+
+        if res.status().is_success() {
+            let data: api_types::recent_tracks = res.json()?;
+            self.buf = data.recenttracks.track
+                .iter()
+                .map(|t| {
+                    Ok(Track {
+                        artist: t.artist.text.clone(),
+                        name: t.name.clone(),
+                        album: t.album.text.clone(),
+                        timestamp: t.date.uts.parse()?,
+                    })
+                })
+                .collect::<Result<Vec<Track>>>()?;
+            Ok(())
+        }
+        else {
+            Err(failure::err_msg(res.status().as_str().to_string()))
+        }
+    }
+}
+
+impl<'a> Iterator for Tracks<'a> {
+    type Item = Track;
+
+    fn next(&mut self) -> Option<Track> {
+        if self.buf.len() == 0 {
+            let result = self.get_next_page();
+            if result.is_err() {
+                return None;
+            }
+        }
+        self.buf.pop()
+    }
+}
+
+impl LastFMClient {
+    pub fn new(api_key: &str, user: &str) -> LastFMClient {
+        LastFMClient {
+            client: reqwest::Client::new(),
+            api_key: api_key.to_string(),
+            user: user.to_string(),
+        }
+    }
+
+    pub fn track_count(&self) -> Result<u64> {
+        let mut res = self.client
+            .get(API_ROOT)
+            .query(&[
+                ("method", "user.getrecenttracks"),
+                ("api_key", &self.api_key),
+                ("user", &self.user),
+                ("format", "json"),
+            ])
+            .send()?;
+
+        if res.status().is_success() {
+            let data: api_types::recent_tracks = res.json()?;
+            Ok(data.recenttracks.attr.total.parse()?)
+        }
+        else {
+            Err(failure::err_msg(res.status().as_str().to_string()))
+        }
+    }
+
+    pub fn tracks(&self) -> Tracks {
+        Tracks::new(&self)
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index f1018d9..0df7810 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,32 @@
 extern crate directories;
 extern crate failure;
+extern crate reqwest;
 extern crate rusqlite;
+extern crate serde;
+extern crate serde_json;
+#[macro_use]
+extern crate serde_derive;
 
 mod error;
+mod lastfm;
 mod paths;
 mod db;
 
 fn main() {
+    let args: Vec<_> = std::env::args().collect();
+    if args.len() < 3 {
+        panic!("usage: {} USERNAME API_KEY", args[0]);
+    }
+    let username = &args[1];
+    let api_key = &args[2];
+
     let db = db::DB::new(&paths::dbpath())
         .expect("failed to create db");
+    let lastfm = lastfm::LastFMClient::new(api_key, username);
+
+    println!("{}", lastfm.track_count().unwrap());
+
+    for track in lastfm.tracks().take(10) {
+        println!("{}", track.name);
+    }
 }
-- 
cgit v1.2.3-54-g00ecf