Replace parser with string matching

examples/bootstrap4/app/__init__.py

@@ -8,7 +8,7 @@
 
 bootstrap = Bootstrap(app)
 login = LoginManager(app)
-login.login_view = 'login'
+login.login_view = 'index'
 modal = Modal(app)
 
 

flask_modals/modal.py

@@ -3,7 +3,7 @@
 from flask import (Blueprint, render_template, get_flashed_messages,
                    _app_ctx_stack, request)
 from jinja2 import Markup
-from flask_modals.parser import ModalParser
+from flask_modals.partial import get_partial
 
 
 def modal_messages():
@@ -28,23 +28,16 @@ def render_template_modal(*args, **kwargs):
         # prevent flash messages from showing both outside and
         # inside the modal
         ctx._modal = True
-        html = render_template(*args, **kwargs)
-        parser = ModalParser(html, modal)
-        parser.feed(html)
-        return f'<template>{parser.stream}</template>'
+        partial = get_partial(modal, *args, **kwargs)
+        return f'<template>{partial}</template>'
     else:
         return render_template(*args, **kwargs)
 
 
 def can_stream():
     '''Returns `True` if the client accepts streams.'''
 
-    stream_mimetype = 'text/modal-stream.html'
-    if stream_mimetype not in request.accept_mimetypes.values():
-        return False
-    best = request.accept_mimetypes.best_match([
-        stream_mimetype, 'text/html'])
-    return best == stream_mimetype
+    return 'text/modal-stream.html' in request.accept_mimetypes.values()
 
 
 def response(template=None):
@@ -107,7 +100,7 @@ def show_flashed_messages(*args, **kwargs):
 
         return get_flashed_messages(*args, **kwargs)
 
-    def load(self, url=None):
+    def load(self):
         '''Load the following markup:
 
         1. nprogress.html - NProgress js library for progress bar

flask_modals/partial.py

@@ -0,0 +1,29 @@
+import re
+
+from flask import render_template
+
+
+def get_partial(modal, *args, **kwargs):
+    '''Return the modal body.'''
+
+    html = render_template(*args, **kwargs)
+    lines = html.splitlines(keepends=True)
+
+    found_modal = False
+    found_modal_body = False
+    div_count = 0
+    partial = ''
+    for line in lines:
+        if f'id="{modal}"' in line:
+            found_modal = True
+        if found_modal:
+            if 'class="modal-body' in line:
+                found_modal_body = True
+            if found_modal_body:
+                partial += line
+                startdivs = re.findall(r'<div.*?>', line, re.IGNORECASE)
+                enddivs = re.findall(r'</div>', line, re.IGNORECASE)
+                div_count += len(startdivs) - len(enddivs)
+                if div_count <= 0:
+                    break
+    return partial

flask_modals/static/js/main.js

@@ -6,17 +6,23 @@
     if (modalBodyEl) {
       el.addEventListener('submit', e => {
         e.preventDefault()
-        fetchData(el, modalBodyEl)
+        fetchData(el, modalBodyEl, e.submitter)
       })
     }
   })
 
-  function fetchData(el, modalBodyEl) {
+  function fetchData(el, modalBodyEl, submitter) {
     let url
+    const body = new FormData(el)
+    if (submitter) {
+      const name = submitter.getAttribute('name')
+      const value = submitter.getAttribute('value')
+      body.append(name, value)
+    }
     NProgress.start()
     fetch(el.action, {
       method: el.method,
-      body: new FormData(el),
+      body: body,
       headers: {
         Accept: 'text/modal-stream.html'
       }
@@ -40,7 +46,7 @@
           const el = modalBodyEl.querySelector('form')
           el.addEventListener('submit', e => {
             e.preventDefault()
-            fetchData(el, modalBodyEl)
+            fetchData(el, modalBodyEl, e.submitter)
           })
         } else {
           if (location.href !== url) {

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name='Flask-Modals',
-    version='0.4.0',
+    version='0.4.1',
     author='Debashish Palit',
     author_email='[email protected]',
     description='Use forms in Bootstrap modals with Flask.',