Update ignore syntax to allow adding SQL WHERE clauses.

Cargo.lock

@@ -113,7 +113,7 @@ dependencies = [
 
 [[package]]
 name = "bliss-analyser"
-version = "0.0.1"
+version = "0.0.2"
 dependencies = [
  "anyhow",
  "argparse",

ChangeLog

@@ -2,6 +2,7 @@
 -----
 1. Package vcruntime140.dll with Windows ZIP.
 2. Update user docs.
+3. Update ignore syntax to allow adding SQL WHERE clauses.
 
 0.0.1
 -----

UserGuide.md

@@ -258,19 +258,23 @@ accomplished be setting the `Ignore` column to `1` for such tracks. To make this
 easier, `bliss-analyser` can read a text file containing items to ignore and
 will update the database as appropriate.
 
-This `ignore` file is a plain text file where each line contains the unique
-path to be ignored. i.e. it could contain  the complete path (relative to your
-music folder) of a track, an album name (to exclude a whole album), or an artist
-name (to exclude all tracks by the artist). e.g.
+This `ignore` file is a plain text file where each line contains either:
+
+1. The unique path to be ignored. i.e. it could contain  the complete path
+(relative to your music folder) of a track, an album name (to exclude a whole
+album), or an artist name (to exclude all tracks by the artist).
+2. An SQL selector. If so, line must start "SQL:" followed by code that will be
+run after WHERE
 
 ```
 ABBA/Gold - Greatest Hits/01 Dancing Queen.mp3
 AC-DC/Power Up/
 The Police/
+SQL:Genre='Blues'
 ```
 
-This would exclude 'Dancing Queen' by ABBA, all of AC/DC's 'Power Up', and all
-tracks by 'The Police'
+This would exclude 'Dancing Queen' by ABBA, all of AC/DC's 'Power Up', all
+tracks by 'The Police', and all tracks with 'Genre' set to 'Blues'
 
 Assuming `config.ini` is in the current folder and contains valid entries, this
 is accomplished as follows:

src/db.rs

@@ -249,11 +249,19 @@ impl Db {
         }
     }
 
-    pub fn set_ignore(&self, like:&str) {
-        log::info!("Ignore: {}", like);
-        match self.conn.execute(&format!("UPDATE Tracks SET Ignore=1 WHERE File LIKE \"{}%\"", like), []) {
-            Ok(_) => { },
-            Err(e) => { log::error!("Failed set Ignore column for '{}'. {}", like, e); }
+    pub fn set_ignore(&self, line:&str) {
+        log::info!("Ignore: {}", line);
+        if line.starts_with("SQL:") {
+            let sql = &line[4..];
+            match self.conn.execute(&format!("UPDATE Tracks Set Ignore=1 WHERE {}", sql), []) {
+                Ok(_) => { },
+                Err(e) => { log::error!("Failed set Ignore column for '{}'. {}", line, e); }
+            }
+        } else {
+            match self.conn.execute(&format!("UPDATE Tracks SET Ignore=1 WHERE File LIKE \"{}%\"", line), []) {
+                Ok(_) => { },
+                Err(e) => { log::error!("Failed set Ignore column for '{}'. {}", line, e); }
+            }
         }
     }
  }