Rename Flask template app to pbpl

Signed-off-by: Arija A. <ari@ari.lt>

src/pbpl/forms/text.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""Text form"""
+
+import typing as t
+
+from flask_wtf import FlaskForm  # type: ignore
+from wtforms import HiddenField, SubmitField, TextAreaField  # type: ignore
+from wtforms.validators import DataRequired, Length  # type: ignore
+
+from pbpl.const import TEXT_SIZE_MAX
+
+__all__: t.Tuple[str, ...] = ("TextForm",)
+
+
+class TextForm(FlaskForm):
+    """Example text form"""
+
+    text = TextAreaField(
+        "Enter some text here",
+        validators=(
+            DataRequired(message="You must enter text"),
+            Length(
+                min=1,
+                max=TEXT_SIZE_MAX,
+                message=f"Invalid length (min=1, max={TEXT_SIZE_MAX}",
+            ),
+        ),
+    )
+
+    pow_solution = HiddenField(
+        "Proof of Work Solution",
+        validators=[DataRequired(message="Proof of work is required to submit.")],
+    )
+
+    form_submit = SubmitField("Submit text")