From 1af594b0c06f6e84955992e08b7c1ee28b4dc61b Mon Sep 17 00:00:00 2001
From: Andrea Zagli <azagli@libero.it>
Date: Fri, 6 Jan 2023 11:27:46 +0100
Subject: [PATCH] Field's filters.

---
 examples/form.rs |  6 ++++++
 src/filters.rs   |  9 +++++++++
 src/lib.rs       | 14 ++++++++++++++
 3 files changed, 29 insertions(+)
 create mode 100644 src/filters.rs

diff --git a/examples/form.rs b/examples/form.rs
index 7909609..fa85845 100644
--- a/examples/form.rs
+++ b/examples/form.rs
@@ -1,5 +1,7 @@
 extern crate zakform;
 
+use zakform::filters;
+
 use config::{Config, ConfigError};
 use serde_derive::Deserialize;
 
@@ -61,12 +63,16 @@ async fn index_post(
 	let mut fi = zakform::Field::new(zakform::FType::Text, "name");
 	fi.set_label("Name");
 	fi.set_value(form.name.as_str());
+	fi.add_filter(filters::filter_uppercase);
+	fi.filter();
 	f.add_field(fi);
 
 	let mut fi = zakform::Field::new(zakform::FType::TextArea, "notes");
 	fi.set_label("Notes");
 	fi.set_rows(15);
 	fi.set_value(form.notes.as_str());
+	fi.add_filter(filters::filter_trim);
+	fi.filter();
 	f.add_field(fi);
 
 	let fs = f.fields();
diff --git a/src/filters.rs b/src/filters.rs
new file mode 100644
index 0000000..e6e628f
--- /dev/null
+++ b/src/filters.rs
@@ -0,0 +1,9 @@
+pub type Filter = fn(value: &String) -> String;
+
+pub fn filter_trim(value: &String) -> String {
+	String::from(value.trim())
+}
+
+pub fn filter_uppercase(value: &String) -> String {
+	value.to_uppercase()
+}
diff --git a/src/lib.rs b/src/lib.rs
index 689f40f..79e48ba 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,7 @@
 use tera::Tera;
 
+pub mod filters;
+
 pub enum FType {
 	Text,
 	TextArea
@@ -16,6 +18,7 @@ pub struct Field {
 	help: String,
 	value: String,
 	tmpl: tera::Tera,
+	filters: Vec<filters::Filter>,
 }
 
 impl Field {
@@ -31,6 +34,7 @@ impl Field {
 			help: String::new(),
 			value: String::new(),
 			tmpl: Tera::default(),
+			filters: vec![],
 		};
 
 		match f.ftype {
@@ -111,6 +115,16 @@ impl Field {
 		self.value = String::from(value);
 	}
 
+	pub fn add_filter(&mut self, filter: filters::Filter) {
+		self.filters.push(filter);
+	}
+
+	pub fn filter(&mut self) {
+		for f in &self.filters {
+			self.value = (f)(&self.value);
+		}
+	}
+
 	pub fn render(&self) -> String {
 		let mut s = String::new();
 
-- 
2.49.0