fix: handle missing pages in mkdocs nav section

Add handling of missing (may be on purpose)
navigation section (nav) in mkdocs.yml config file.

If pages are missing in nav, plugin will create the
required pages from the filesystem structure, e.g.

parent1/parent2/.../your_page.md:
                                  # My Page
                                  ...

In the following manner:
Confluence Space:
   * Main Parent:
      * Parent1:
        * Parent2:
          ...:
            - My Page

Fix for Issue: #2

mkdocs_with_confluence/plugin.py

@@ -6,6 +6,7 @@ import shutil
 import requests
 import mimetypes
 import mistune
+from time import sleep
 from mkdocs.config import config_options
 from mkdocs.plugins import BasePlugin
 from md2cf.confluence_renderer import ConfluenceRenderer
@@ -38,12 +39,26 @@ class MkdocsWithConfluence(BasePlugin):
     def on_nav(self, nav, config, files):
         MkdocsWithConfluence.tab_nav = []
         navigation_items = nav.__repr__()
+
         for n in navigation_items.split("\n"):
-            # print(f"* {n}")
             leading_spaces = len(n) - len(n.lstrip(" "))
             spaces = leading_spaces * " "
             if "Page" in n:
-                p = spaces + self.__get_page_title(n)
+                try:
+                    self.page_title = self.__get_page_title(n)
+                    if self.page_title is None:
+                        raise AttributeError
+                except AttributeError:
+                    self.page_local_path = self.__get_page_url(n)
+                    print(
+                        f"WARN    - Page from path {self.page_local_path} has no"
+                        f"          entity in the mkdocs.yml nav section. It will be uploaded"
+                        f"          to the Confluence, but you may not see it on the web server!"
+                    )
+                    self.page_local_name = self.__get_page_name(n)
+                    self.page_title = self.page_local_name
+
+                p = spaces + self.page_title
                 MkdocsWithConfluence.tab_nav.append(p)
             if "Section" in n:
                 s = spaces + self.__get_section_title(n)
@@ -51,8 +66,11 @@ class MkdocsWithConfluence(BasePlugin):
 
     def on_files(self, files, config):
         pages = files.documentation_pages()
-        self.flen = len(pages)
-        print(f"Number of Files: {self.flen}")
+        try:
+            self.flen = len(pages)
+            print(f"Number of Files in directory tree: {self.flen}")
+        except 0:
+            print("ERR: You have no documentation pages" "in the directory tree, please add at least one!")
 
     def on_post_template(self, output_content, template_name, config):
         if self.config["verbose"] is False and self.config["debug"] is False:
@@ -247,8 +265,24 @@ class MkdocsWithConfluence(BasePlugin):
                         time.sleep(1)
 
                     # if self.config['debug']:
-                    print(f"Trying to ADD page '{page.title}' to parent0({parent}) ID: {parent_id}")
+
+                    if parent_id is None:
+                        for i in range(11):
+                            while parent_id is None:
+                                try:
+                                    self.add_page(page.title, parent_id, confluence_body)
+                                except requests.exceptions.HTTPError:
+                                    print(
+                                        f"ERR    - HTTP error on adding page. It probably occured due to "
+                                        f"parent ID('{parent_id}') page is not YET synced on server. Retry nb {i}/10..."
+                                    )
+                                    sleep(5)
+                                    parent_id = self.find_page_id(parent)
+                                break
+
                     self.add_page(page.title, parent_id, confluence_body)
+
+                    print(f"Trying to ADD page '{page.title}' to parent0({parent}) ID: {parent_id}")
                     for i in MkdocsWithConfluence.tab_nav:
                         if page.title in i:
                             n_kol = len(i + "INFO    - Mkdocs With Confluence:" + " *NEW PAGE*")
@@ -271,11 +305,22 @@ class MkdocsWithConfluence(BasePlugin):
     def on_page_content(self, html, page, config, files):
         return html
 
+    def __get_page_url(self, section):
+        return re.search("url='(.*)'\\)", section).group(1)[:-1] + ".md"
+
+    def __get_page_name(self, section):
+        return os.path.basename(re.search("url='(.*)'\\)", section).group(1)[:-1])
+
     def __get_section_title(self, section):
         return re.search("Section\\(title='(.*)'\\)", section).group(1)
 
     def __get_page_title(self, section):
-        return re.search("\\s*Page\\(title='(.*)',", section).group(1)
+        r = re.search("\\s*Page\\(title='(.*)',", section)
+        try:
+            return r.group(1)
+        except AttributeError:
+            name = self.__get_page_url(section)
+            print(f"ERR    - Page '{name}' doesn't exist in the mkdocs.yml nav section!")
 
     def add_attachment(self, page_name, filepath):
         if self.config["verbose"]: