initial commit

where.go

@@ -0,0 +1,32 @@
+package simql
+
+import "regexp"
+
+var whereRegexp = regexp.MustCompile("^((and|or) )?([^ ]+) (=|!=|>|>=|<|<=) ([^ ]+)?$")
+
+type Where string
+
+func (w Where) IsValid() bool {
+	return whereRegexp.MatchString(string(w))
+}
+
+func (w Where) Parse() (glue, column, operator string, value any, ok bool) {
+	if whereRegexp.MatchString(string(w)) {
+		ok = true
+
+		result := whereRegexp.FindAllStringSubmatch(string(w), -1)
+		for _, r := range result {
+			glue, column, operator, value = r[2], r[3], r[4], r[5]
+
+			if value == "?" {
+				value = nil
+			}
+		}
+	}
+
+	return
+}
+
+func (w Where) String() string {
+	return string(w)
+}