Initial commit

1 files changed, 78 insertions, 0 deletions

diff --git a/src/Search/LogicOp.php b/src/Search/LogicOp.php
new file mode 100644
index 0000000..85fb8fa
--- /dev/null
+++ b/src/Search/LogicOp.php
@@ -0,0 +1,78 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class LogicOp implements SearchExpr
+{
+    public const OP_AND = "and";
+    public const OP_OR = "or";
+
+    private const SQLOPS = [
+        self::OP_AND => "AND",
+        self::OP_OR => "OR",
+    ];
+
+    private string $op;
+    private SearchExpr $a;
+    private SearchExpr $b;
+
+    public function __construct(string $op, SearchExpr $a, SearchExpr $b)
+    {
+        if (!self::checkOp($op))
+            throw new \DomainException("{$op} is not a valid operator");
+
+        $this->op = $op;
+        $this->a = $a;
+        $this->b = $b;
+    }
+
+    public static function build(string $op, SearchExpr $a, SearchExpr $b): SearchExpr
+    {
+        return $a instanceof AbstractFTSExpr && $b instanceof AbstractFTSExpr
+            ? new FTSLogicOp($op, $a, $b)
+            : new self($op, $a, $b);
+    }
+
+    /**
+     * @param string $op
+     * @return bool
+     */
+    public static function checkOp(string $op): bool
+    {
+        return in_array($op, [
+            self::OP_AND,
+            self::OP_OR,
+        ]);
+    }
+
+    public function getA(): SearchExpr { return $this->a; }
+    public function getB(): SearchExpr { return $this->b; }
+    public function getOp(): string { return $this->op; }
+
+    public function toString(): string
+    {
+        return "({$this->a->toString()}) {$this->op} ({$this->b->toString()})";
+    }
+
+    public function toSQL($bindPrefix, bool $singleFTS): SQLSearchExpr
+    {
+        $sqlex = new SQLSearchExpr();
+
+        $a = $this->a->toSQL("a_$bindPrefix", $singleFTS);
+        $b = $this->b->toSQL("b_$bindPrefix", $singleFTS);
+        $sqlop = self::SQLOPS[$this->op];
+        assert($sqlop);
+
+        $sqlex->sql = "(({$a->sql}) {$sqlop} ({$b->sql}))";
+        $sqlex->bindings = array_merge($a->bindings, $b->bindings);
+
+        return $sqlex;
+    }
+
+    public function countFTSQueries(): int
+    {
+        return $this->a->countFTSQueries() + $this->b->countFTSQueries();
+    }
+}
\ No newline at end of file