From c4928d46486c4117b1bf2738d114297a42cf1940 Mon Sep 17 00:00:00 2001
From: bobufa <bobufa@users.noreply.github.com>
Date: Mon, 18 Jun 2018 01:47:43 +0200
Subject: add support for fts tables to qlite

---
 qlite/src/table.vala | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'qlite/src/table.vala')

diff --git a/qlite/src/table.vala b/qlite/src/table.vala
index 00b4ef00..8725c4c9 100644
--- a/qlite/src/table.vala
+++ b/qlite/src/table.vala
@@ -8,6 +8,8 @@ public class Table {
     protected Column[]? columns;
     private string constraints = "";
     private string[] post_statements = {};
+    private string[] create_statements = {};
+    internal Column[]? fts_columns;
 
     public Table(Database db, string name) {
         this.db = db;
@@ -19,6 +21,33 @@ public class Table {
         this.constraints = constraints;
     }
 
+    public void fts(Column[] columns) {
+        if (fts_columns != null) error("Only one FTS index may be used per table.");
+        fts_columns = columns;
+        string cs = "";
+        string cnames = "";
+        string cnews = "";
+        foreach (Column c in columns) {
+            cs += @", $c";
+            cnames += @", $(c.name)";
+            cnews += @", new.$(c.name)";
+        }
+        add_create_statement(@"CREATE VIRTUAL TABLE IF NOT EXISTS _fts_$name USING fts4(tokenize=unicode61, content=\"$name\"$cs)");
+        add_post_statement(@"CREATE TRIGGER IF NOT EXISTS _fts_bu_$(name) BEFORE UPDATE ON $name BEGIN DELETE FROM _fts_$name WHERE docid=old.rowid; END");
+        add_post_statement(@"CREATE TRIGGER IF NOT EXISTS _fts_bd_$(name) BEFORE DELETE ON $name BEGIN DELETE FROM _fts_$name WHERE docid=old.rowid; END");
+        add_post_statement(@"CREATE TRIGGER IF NOT EXISTS _fts_au_$(name) AFTER UPDATE ON $name BEGIN INSERT INTO _fts_$name(docid$cnames) VALUES(new.rowid$cnews); END");
+        add_post_statement(@"CREATE TRIGGER IF NOT EXISTS _fts_ai_$(name) AFTER INSERT ON $name BEGIN INSERT INTO _fts_$name(docid$cnames) VALUES(new.rowid$cnews); END");
+    }
+
+    public void fts_rebuild() {
+        if (fts_columns == null) error("FTS not available on this table.");
+        try {
+            db.exec(@"INSERT INTO _fts_$name(_fts_$name) VALUES('rebuild');");
+        } catch (Error e) {
+            error("Qlite Error: Rebuilding FTS index");
+        }
+    }
+
     public void unique(Column[] columns, string? on_conflict = null) {
         constraints += ", UNIQUE (";
         bool first = true;
@@ -37,6 +66,10 @@ public class Table {
         post_statements += stmt;
     }
 
+    public void add_create_statement(string stmt) {
+        create_statements += stmt;
+    }
+
     public void index(string index_name, Column[] columns, bool unique = false) {
         string stmt = @"CREATE $(unique ? "UNIQUE" : "") INDEX IF NOT EXISTS $index_name ON $name (";
         bool first = true;
@@ -58,6 +91,15 @@ public class Table {
         return db.select(columns).from(this);
     }
 
+    private MatchQueryBuilder match_query() {
+        ensure_init();
+        return db.match_query(this);
+    }
+
+    public MatchQueryBuilder match(Column<string> column, string query) {
+        return match_query().match(column, query);
+    }
+
     public InsertBuilder insert() {
         ensure_init();
         return db.insert().into(this);
@@ -107,6 +149,13 @@ public class Table {
         } catch (Error e) {
             error("Qlite Error: Create table at version");
         }
+        foreach (string stmt in create_statements) {
+            try {
+                db.exec(stmt);
+            } catch (Error e) {
+                error("Qlite Error: Create table at version");
+            }
+        }
     }
 
     public void add_columns_for_version(long old_version, long new_version) {
-- 
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