From 1ef6b8397917c4c31470fd14fa2b773651e40a3c Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@libreserver.org>
Date: Sun, 27 Feb 2022 12:44:47 +0000
Subject: [PATCH] Reading pwa colors into the meta html headers

---
 daemon.py       | 32 ++++----------------------------
 webapp_utils.py | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 52 insertions(+), 29 deletions(-)

diff --git a/daemon.py b/daemon.py
index 2bcf31b30..649cf4335 100644
--- a/daemon.py
+++ b/daemon.py
@@ -167,6 +167,7 @@ from webapp_utils import html_hashtag_blocked
 from webapp_utils import html_following_list
 from webapp_utils import set_blog_address
 from webapp_utils import html_show_share
+from webapp_utils import get_pwa_theme_colors
 from webapp_calendar import html_calendar_delete_confirm
 from webapp_calendar import html_calendar
 from webapp_about import html_about
@@ -6878,35 +6879,10 @@ class PubServer(BaseHTTPRequestHandler):
                                       getreq_start_time) -> None:
         """gets the PWA manifest
         """
-        default_pwa_theme_color = 'apple-mobile-web-app-status-bar-style'
-        default_pwa_theme_background_color = 'black-translucent'
-        pwa_theme_color = default_pwa_theme_color
-        pwa_theme_background_color = default_pwa_theme_background_color
-
         css_filename = base_dir + '/epicyon.css'
-        if os.path.isfile(css_filename):
-            css_str = ''
-            with open(css_filename, 'r') as fp_css:
-                css_str = fp_css.read()
-            if '--pwa-theme-color:' in css_str:
-                pwa_theme_color = css_str.split('--pwa-theme-color:')[1]
-                if ';' in pwa_theme_color:
-                    pwa_theme_color = pwa_theme_color.split(';')[0].strip()
-                pwa_theme_color = remove_html(pwa_theme_color)
-                if ' ' in pwa_theme_color:
-                    pwa_theme_color = \
-                        default_pwa_theme_color
-            if '--pwa-theme-background-color:' in css_str:
-                pwa_theme_background_color = \
-                    css_str.split('--pwa-theme-background-color:')[1]
-                if ';' in pwa_theme_background_color:
-                    pwa_theme_background_color = \
-                        pwa_theme_background_color.split(';')[0].strip()
-                pwa_theme_background_color = \
-                    remove_html(pwa_theme_background_color)
-                if ' ' in pwa_theme_background_color:
-                    pwa_theme_background_color = \
-                        default_pwa_theme_background_color
+        pwa_theme_color, pwa_theme_background_color = \
+            get_pwa_theme_colors(css_filename)
+
         app1 = "https://f-droid.org/en/packages/eu.siacs.conversations"
         app2 = "https://staging.f-droid.org/en/packages/im.vector.app"
         app3 = \
diff --git a/webapp_utils.py b/webapp_utils.py
index 3ea3d5c06..ed6103d79 100644
--- a/webapp_utils.py
+++ b/webapp_utils.py
@@ -538,11 +538,56 @@ def get_right_image_file(base_dir: str,
                            account_dir, nickname, domain, theme)
 
 
+def _get_variable_from_css(css_str: str, variable: str) -> str:
+    """Gets a variable value from the css file text
+    """
+    if '--' + variable + ':' not in css_str:
+        return None
+    value = css_str.split('--' + variable + ':')[1]
+    if ';' in value:
+        value = value.split(';')[0].strip()
+    value = remove_html(value)
+    if ' ' in value:
+        value = None
+    return value
+
+
+def get_pwa_theme_colors(css_filename: str) -> (str, str):
+    """Gets the theme/statusbar color for progressive web apps
+    """
+    default_pwa_theme_color = 'apple-mobile-web-app-status-bar-style'
+    pwa_theme_color = default_pwa_theme_color
+
+    default_pwa_theme_background_color = 'black-translucent'
+    pwa_theme_background_color = default_pwa_theme_background_color
+
+    if not os.path.isfile(css_filename):
+        return pwa_theme_color, pwa_theme_background_color
+
+    css_str = ''
+    with open(css_filename, 'r') as fp_css:
+        css_str = fp_css.read()
+
+    pwa_theme_color = \
+        _get_variable_from_css(css_str, 'pwa-theme-color')
+    if not pwa_theme_color:
+        pwa_theme_color = default_pwa_theme_color
+
+    pwa_theme_background_color = \
+        _get_variable_from_css(css_str, 'pwa-theme-background-color')
+    if not pwa_theme_background_color:
+        pwa_theme_background_color = default_pwa_theme_background_color
+
+    return pwa_theme_color, pwa_theme_background_color
+
+
 def html_header_with_external_style(css_filename: str, instance_title: str,
                                     metadata: str, lang='en') -> str:
     if metadata is None:
         metadata = ''
     css_file = '/' + css_filename.split('/')[-1]
+    pwa_theme_color, pwa_theme_background_color = \
+        get_pwa_theme_colors(css_filename)
     html_str = \
         '<!DOCTYPE html>\n' + \
         '<html lang="' + lang + '">\n' + \
@@ -557,8 +602,10 @@ def html_header_with_external_style(css_filename: str, instance_title: str,
         '    <meta content="yes" name="apple-mobile-web-app-capable">\n' + \
         '    <link href="/apple-touch-icon.png" rel="apple-touch-icon" ' + \
         'sizes="180x180">\n' + \
-        '    <meta name="theme-color" content="grey">\n' + \
+        '    <meta name="theme-color" content="' + pwa_theme_color + '">\n' + \
         metadata + \
+        '    <meta name="apple-mobile-web-app-status-bar-style" ' + \
+        'content="' + pwa_theme_background_color + '">' + \
         '    <title>' + instance_title + '</title>\n' + \
         '  </head>\n' + \
         '  <body>\n'