X-Git-Url: http://nitlanguage.org

diff --git a/lib/popcorn/pop_templates.nit b/lib/popcorn/pop_templates.nit
index 1ba2165..4aea76d 100644
--- a/lib/popcorn/pop_templates.nit
+++ b/lib/popcorn/pop_templates.nit
@@ -14,9 +14,76 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Template rendering for popcorn
+#
+# ## Basic templates
+#
+# Use TemplateString to render really basic templates that just need macro
+# replacements.
+#
+# Example:
+# ~~~nit
+# class TemplateStringHandler
+#	super Handler
+#
+#	redef fun get(req, res) do
+#		# Values to add in the template
+#		var values = new HashMap[String, String]
+#		values["USER"] = "Morriar"
+#		values["MYSITE"] = "My super website"
+#
+#		# Render it with a shortcut
+#		res.template_string("""
+#			<h1>Hello %USER%!</h1>
+#			<p>Welcome to %MYSITE%.</p>
+#		""", values)
+#	end
+# end
+# ~~~
+#
+# For larger templates, you can also use external files (makes your Nit code cleaner):
+# ~~~nit
+# class TemplateFileHandler
+#	super Handler
+#
+#	redef fun get(req, res) do
+#		# Values to add in the template
+#		var values = new HashMap[String, String]
+#		values["USER"] = "Morriar"
+#		values["MYSITE"] = "My super website"
+#
+#		# Render it from an external file
+#		res.template_file("example_template.tpl", values)
+#	end
+# end
+# ~~~
+#
+# ## Using pug templates
+#
+# Pug is a templating format provided by the external command `pug`.
+# For complex templates that need conditional or loop statements, pug can be a solution.
+#
+# See the pug syntax here: https://pugjs.org/api/getting-started.html
+#
+# ~~~nit
+# class PugFileHandler
+#	super Handler
+#
+#	redef fun get(req, res) do
+#		# Values to add in the template
+#		var json = new JsonObject
+#		json["user"] = "Morriar"
+#		json["mysite"] = "My super website"
+#
+#		# Render it from an external file
+#		res.pug_file("example_template.pug", json)
+#	end
+# end
+# ~~~
 module pop_templates
 
 import popcorn::pop_handlers
+import popcorn::pop_json
 import template::macro
 
 redef class HttpResponse
@@ -43,4 +110,26 @@ redef class HttpResponse
 		var tpl = new TemplateString.from_file(file)
 		template(tpl, values, status)
 	end
+
+	# Render `pug_string` with the command cli `pug` and use data from `json`
+	#
+	# See https://pugjs.org/api/getting-started.html for more details on pug.
+	fun pug(pug_string: nullable String, json: nullable Serializable, status: nullable Int) do
+		var process
+		if json == null then
+			process = new ProcessDuplex("pug", "-D")
+		else
+			process = new ProcessDuplex("pug", "-D", "-O", json.to_json)
+		end
+		var out = process.write_and_read(pug_string or else "")
+		process.close
+		html(out, status)
+	end
+
+	# Render `file` with the command cli `pug` and use data from `json`
+	#
+	# See https://pugjs.org/api/getting-started.html for more details on pug.
+	fun pug_file(file: String, json: nullable Serializable, status: nullable Int) do
+		pug(file.to_path.read_all, json, status)
+	end
 end