Handle permission error for IO counters

Include an option for custom service names
Center collapsible details in the UI

pyninja/monitor/templates/main.html

@@ -153,15 +153,6 @@
             background-color: #e0e0e0;
         }
 
-        .center-container {
-            width: 100%;
-            margin-left: 45%;
-        }
-
-        .center-container details {
-            text-align: left;
-        }
-
         h1 {
             width: 100%;
             text-align: center;
@@ -219,9 +210,24 @@
 
     </style>
     <style>
+        /* This container will only take up the space needed */
+        .center-container {
+            display: flex;
+            flex-direction: column;
+            justify-content: center;
+            margin-left: 40%;
+            text-align: left;
+        }
+
+        .center-container details {
+            width: 40%;
+            text-align: center;
+        }
+
         .collapsible-table {
             display: table;
             border-collapse: collapse;
+            width: 100%;
         }
 
         .collapsible-table-row {
@@ -237,6 +243,18 @@
         .collapsible-table-cell {
             font-weight: bold;
         }
+
+        /* Ensures that the details are collapsed initially and expand on click
+        details[open] summary:before {
+            content: '-';
+            padding-right: 10px;
+        }
+
+        details summary:before {
+            content: '+';
+            padding-right: 10px;
+        }
+        */
     </style>
     <noscript>
         <style>

pyninja/operations.py

@@ -16,21 +16,23 @@
 def default(name: str):
     """Default values for processes and services."""
     return {
+        "PID": 0000,
         "Name": name,
-        "PID": 0,
-        "Memory": "N/A",
         "CPU": "N/A",
+        "Memory": "N/A",
         "Uptime": "N/A",
+        "Threads": "N/A",
         "Read I/O": "N/A",
-        "Write I/O": "N/A",
+        "Write I/O": "N/A"
     }
 
 
-def get_process_info(proc: psutil.Process) -> Dict[str, str | int]:
+def get_process_info(proc: psutil.Process, process_name: str = None) -> Dict[str, str | int]:
     """Get process information.
 
     Args:
         proc: Takes a ``psutil.Process`` object as an argument.
+        process_name: Takes a custom process name as an optional argument.
 
     Returns:
         Dict[str, str | int]:
@@ -41,12 +43,13 @@ def get_process_info(proc: psutil.Process) -> Dict[str, str | int]:
         io_counters = proc.io_counters()
         read_io = squire.size_converter(io_counters.read_bytes)
         write_io = squire.size_converter(io_counters.write_bytes)
-    except AttributeError:
+    except (AttributeError, psutil.AccessDenied) as error:
+        LOGGER.debug(error)
         read_io, write_io = "N/A", "N/A"
     try:
         return {
             "PID": proc.pid,
-            "Name": proc.name(),
+            "Name": process_name or proc.name(),
             "CPU": f"{proc.cpu_percent(models.MINIMUM_CPU_UPDATE_INTERVAL):.2f}%",
             # Resident Set Size
             "Memory": squire.size_converter(proc.memory_info().rss),
@@ -57,9 +60,9 @@ def get_process_info(proc: psutil.Process) -> Dict[str, str | int]:
             "Read I/O": read_io,
             "Write I/O": write_io,
         }
-    except psutil.NoSuchProcess as error:
+    except psutil.Error as error:
         LOGGER.debug(error)
-        return default(proc.name())
+        return default(process_name or proc.name())
 
 
 async def process_monitor(executor: ThreadPoolExecutor) -> List[Dict[str, str]]:
@@ -113,11 +116,11 @@ async def service_monitor(executor: ThreadPoolExecutor) -> List[Dict[str, str]]:
             continue
         try:
             proc = psutil.Process(pid)
-        except psutil.NoSuchProcess:
-            LOGGER.debug(f"Process with PID {pid} not found")
+        except psutil.Error as error:
+            LOGGER.debug(error)
             usages.append(default(service_name))
             continue
-        tasks.append(loop.run_in_executor(executor, get_process_info, proc))
+        tasks.append(loop.run_in_executor(executor, get_process_info, proc, service_name))
     for task in asyncio.as_completed(tasks):
         usages.append(await task)
     return usages