Format bold, italic, underline text

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

squinnondation/squinnondation.py

@@ -388,7 +388,7 @@ class Squirrel(Hazelnut):
             curses.init_pair(i + 1, i, curses.COLOR_BLACK)
 
         self.hazelnuts = dict()
-        self.history.append(f"<system> Listening on {self.address}:{self.port}")
+        self.history.append(f"<system> *Listening on {self.address}:{self.port}*")
 
     def find_hazelnut(self, address: str, port: int) -> Hazelnut:
         """
@@ -426,6 +426,64 @@ class Squirrel(Hazelnut):
         """
         return self.socket.recvfrom(1024)
 
+    def print_markdown(self, pad: Any, y: int, x: int, msg: str,
+                       bold: bool = False, italic: bool = False, underline: bool = False) -> int:
+        """
+        Parse a markdown-formatted text and format the text as bold, italic or underlined text.
+        ***text***: bold, italic
+        **text**: bold
+        *text*: italic
+        __text__: underline
+        _text_: italic
+        """
+        underline_match = re.match("(.*)__(.*)__(.*)", msg)
+        if underline_match:
+            before, underlined, after = underline_match.group(1), underline_match.group(2), underline_match.group(3)
+            len_before = self.print_markdown(pad, y, x, before, bold, italic, underline)
+            len_mid = self.print_markdown(pad, y, x + len_before, underlined, bold, italic, not underline)
+            len_after = self.print_markdown(pad, y, x + len_before + len_mid, after, bold, italic, underline)
+            return len_before + len_mid + len_after
+
+        italic_match = re.match("(.*)_(.*)_(.*)", msg)
+        if italic_match:
+            before, underlined, after = italic_match.group(1), italic_match.group(2), italic_match.group(3)
+            len_before = self.print_markdown(pad, y, x, before, bold, italic, underline)
+            len_mid = self.print_markdown(pad, y, x + len_before, underlined, bold, not italic, underline)
+            len_after = self.print_markdown(pad, y, x + len_before + len_mid, after, bold, italic, underline)
+            return len_before + len_mid + len_after
+
+        bold_italic_match = re.match("(.*)\\*\\*\\*(.*)\\*\\*\\*(.*)", msg)
+        if bold_italic_match:
+            before, underlined, after = bold_italic_match.group(1), bold_italic_match.group(2),\
+                                        bold_italic_match.group(3)
+            len_before = self.print_markdown(pad, y, x, before, bold, italic, underline)
+            len_mid = self.print_markdown(pad, y, x + len_before, underlined, not bold, not italic, underline)
+            len_after = self.print_markdown(pad, y, x + len_before + len_mid, after, bold, italic, underline)
+            return len_before + len_mid + len_after
+
+        bold_match = re.match("(.*)\\*\\*(.*)\\*\\*(.*)", msg)
+        if bold_match:
+            before, underlined, after = bold_match.group(1), bold_match.group(2), bold_match.group(3)
+            len_before = self.print_markdown(pad, y, x, before, bold, italic, underline)
+            len_mid = self.print_markdown(pad, y, x + len_before, underlined, not bold, italic, underline)
+            len_after = self.print_markdown(pad, y, x + len_before + len_mid, after, bold, italic, underline)
+            return len_before + len_mid + len_after
+
+        italic_match = re.match("(.*)\\*(.*)\\*(.*)", msg)
+        if italic_match:
+            before, underlined, after = italic_match.group(1), italic_match.group(2), italic_match.group(3)
+            len_before = self.print_markdown(pad, y, x, before, bold, italic, underline)
+            len_mid = self.print_markdown(pad, y, x + len_before, underlined, bold, not italic, underline)
+            len_after = self.print_markdown(pad, y, x + len_before + len_mid, after, bold, italic, underline)
+            return len_before + len_mid + len_after
+
+        attrs = 0
+        attrs |= curses.A_BOLD if bold else 0
+        attrs |= curses.A_ITALIC if italic else 0
+        attrs |= curses.A_UNDERLINE if underline else 0
+        pad.addstr(y, x, msg, attrs)
+        return len(msg)
+
     def refresh_history(self) -> None:
         """
         Rewrite the history of the messages.
@@ -442,9 +500,7 @@ class Squirrel(Hazelnut):
             self.history_pad.addstr(i, 1, nickname, curses.A_BOLD | curses.color_pair(color_id + 1))
             self.history_pad.addstr(i, 1 + len(nickname), "> ")
             attrs = curses.color_pair(0)
-            if nickname == "system":
+            self.print_markdown(self.history_pad, i, 3 + len(nickname), msg)
-                attrs |= curses.A_ITALIC
-            self.history_pad.addstr(i, 3 + len(nickname), msg, attrs)
         self.history_pad.refresh(0, 0, 0, 0, curses.LINES - 2, curses.COLS)
 
     def refresh_input(self) -> None:
@@ -474,7 +530,7 @@ class Worm(Thread):
             try:
                 pkt, hazelnut = self.squirrel.receive_packet()
             except ValueError as error:
-                self.squirrel.history.append("<system> An error occured while receiving a packet: {}".format(error))
+                self.squirrel.history.append("<system> *An error occured while receiving a packet: {}*".format(error))
             else:
                 self.squirrel.history.append(pkt.body[0].data.decode('UTF-8'))
                 self.squirrel.refresh_history()