From e7b93b8b15fb67d78b1f57d46a75ee38d053b560 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sa=C3=BAl=20Ortega?= <saulortega@users.noreply.github.com>
Date: Thu, 1 Mar 2018 14:46:36 -0500
Subject: [PATCH] Create generic.go

---
 generic.go | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 generic.go

diff --git a/generic.go b/generic.go
new file mode 100644
index 0000000..ae3420d
--- /dev/null
+++ b/generic.go
@@ -0,0 +1,60 @@
+// This package parse a http request from datatables (jQuery plugin) to a friendly structure
+// More details in https://github.com/saulortega/datatables
+// import "github.com/saulortega/datatables"
+
+package datatables
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+//Parameter to string
+func ptos(r *http.Request, p string) (string, error) {
+	var s = strings.TrimSpace(r.FormValue(p))
+	var e error
+
+	if _, exte := r.Form[p]; !exte {
+		e = errors.New("«" + p + "» parameter not received")
+	}
+
+	return s, e
+}
+
+//Parameter to string; error on empty
+func ptosNoEmpty(r *http.Request, p string) (string, error) {
+	s, e := ptos(r, p)
+	if s == "" && e == nil {
+		e = errors.New("«" + p + "» parameter empty")
+	}
+
+	return s, e
+}
+
+//Parameter to int
+func ptoi(r *http.Request, p string) (int, error) {
+	var i int
+	s, e := ptosNoEmpty(r, p)
+	if e != nil {
+		return i, e
+	}
+
+	i, e = strconv.Atoi(s)
+
+	return i, e
+}
+
+//Parameter to bool
+func ptob(r *http.Request, p string) (bool, error) {
+	var b bool
+	s, e := ptosNoEmpty(r, p)
+	if e != nil {
+		return b, e
+	}
+
+	b, e = strconv.ParseBool(s)
+
+	return b, e
+}