paginate pod logs instead of truncating them

3 files changed, 92 insertions, 25 deletions

diff --git a/arthur/config.py b/arthur/config.py
index 146db73..bb88838 100644
--- a/arthur/config.py
+++ b/arthur/config.py
@@ -27,6 +27,7 @@ class Config(
     guild_id: int = 267624335836053506
     devops_channel_id: int = 675756741417369640
     sentry_dsn: str = ""
+    trashcan: str = "<:trashcan:637136429717389331>"
 
 
 GIT_SHA = environ.get("GIT_SHA", "development")
diff --git a/arthur/exts/kubernetes/pods.py b/arthur/exts/kubernetes/pods.py
index 0a82fb9..bab3f79 100644
--- a/arthur/exts/kubernetes/pods.py
+++ b/arthur/exts/kubernetes/pods.py
@@ -3,6 +3,7 @@
 import zoneinfo
 from datetime import datetime
 
+import discord
 import humanize
 from discord.ext import commands
 from kubernetes_asyncio.client.rest import ApiException
@@ -12,6 +13,7 @@ from tabulate import tabulate
 from arthur.apis.kubernetes import pods
 from arthur.bot import KingArthur
 from arthur.config import CONFIG
+from arthur.pagination import LinePaginator
 from arthur.utils import generate_error_message
 
 MAX_MESSAGE_LENGTH = 2000
@@ -46,9 +48,10 @@ class Pods(commands.Cog):
         pod_list = await pods.list_pods(namespace)
 
         if len(pod_list.items) == 0:
-            return await ctx.send(
+            await ctx.send(
                 generate_error_message(description="No pods found, check the namespace exists.")
             )
+            return
 
         tables = [[]]
 
@@ -95,7 +98,7 @@ class Pods(commands.Cog):
         for table in tables:
             await ctx.send(tabulate_pod_data(table))
 
-        return None
+        return
 
     @pods_cmd.command(name="logs", aliases=["log", "tail"])
     @commands.check(lambda ctx: ctx.channel.id == CONFIG.devops_channel_id)
@@ -116,46 +119,46 @@ class Pods(commands.Cog):
             pod_names = [pod_name]
 
         if pod_names is None:
-            return await ctx.send(
+            await ctx.send(
                 generate_error_message(description="No pods found for the provided deployment.")
             )
+            return
 
         for pod in pod_names:
             try:
                 logs = await pods.tail_pod(namespace, pod, lines=lines)
             except ApiException as e:
                 if e.status == 404:  # noqa: PLR2004, 404 is a known error
-                    return await ctx.send(
+                    await ctx.send(
                         generate_error_message(
                             description="Pod or namespace not found, check the name."
                         )
                     )
-                return await ctx.send(generate_error_message(description=str(e)))
+                    return
+                await ctx.send(generate_error_message(description=str(e)))
+                return
 
             if len(logs) == 0:
-                return await ctx.send(
-                    generate_error_message(description="No logs found for the pod.")
-                )
+                await ctx.send(generate_error_message(description="No logs found for the pod."))
+                return
 
-            truncated = False
+            logs = logs.splitlines()
 
-            if len(logs) > MAX_MESSAGE_LENGTH - 100:
-                truncated = True
-                while len(logs) > MAX_MESSAGE_LENGTH - 100:
-                    logs = logs[: logs.rfind("\n")]
-
-            message = f"**Logs for pod `{pod}` in namespace `{namespace}`**\n"
-
-            if truncated:
-                message += "`[Logs truncated]`\n"
-
-            message += "```"
-            message += logs
-            message += "```"
-
-            await ctx.send(message)
+            logs_embed = discord.Embed(
+                title=f"**Logs for pod `{pod}` in namespace `{namespace}`**",
+                colour=discord.Colour.blue(),
+            )
+            await LinePaginator.paginate(
+                lines=logs,
+                ctx=ctx,
+                max_size=MAX_MESSAGE_LENGTH,
+                empty=False,
+                embed=logs_embed,
+                prefix="```\n",
+                suffix="```",
+            )
 
-        return None
+        return
 
 
 async def setup(bot: KingArthur) -> None:
diff --git a/arthur/pagination.py b/arthur/pagination.py
new file mode 100644
index 0000000..8db0ade
--- /dev/null
+++ b/arthur/pagination.py
@@ -0,0 +1,63 @@
+from collections.abc import Sequence
+
+import discord
+from discord.ext.commands import Context
+from pydis_core.utils.pagination import LinePaginator as _LinePaginator, PaginationEmojis
+
+from arthur.config import CONFIG
+
+
+class LinePaginator(_LinePaginator):
+    """
+    A class that aids in paginating code blocks for Discord messages.
+
+    See the super class's docs for more info.
+    """
+
+    @classmethod
+    async def paginate(
+        cls,
+        lines: list[str],
+        ctx: Context | discord.Interaction,
+        embed: discord.Embed,
+        prefix: str = "",
+        suffix: str = "",
+        max_lines: int | None = None,
+        max_size: int = 500,
+        scale_to_size: int = 4000,
+        restrict_to_user: discord.User | None = None,
+        timeout: int = 300,
+        footer_text: str | None = None,
+        url: str | None = None,
+        allowed_roles: Sequence[int] | None = None,
+        *,
+        reply: bool = False,
+        empty: bool = True,
+        exception_on_empty_embed: bool = False,
+    ) -> discord.Message | None:
+        """
+        Use a paginator and set of reactions to provide pagination over a set of lines.
+
+        Acts as a wrapper for the super class' `paginate` method to provide the pagination emojis by default.
+
+        Consult the super class's `paginate` method for detailed information.
+        """
+        return await super().paginate(
+            pagination_emojis=PaginationEmojis(delete=CONFIG.trashcan),
+            lines=lines,
+            ctx=ctx,
+            embed=embed,
+            prefix=prefix,
+            suffix=suffix,
+            max_lines=max_lines,
+            max_size=max_size,
+            scale_to_size=scale_to_size,
+            empty=empty,
+            restrict_to_user=restrict_to_user,
+            timeout=timeout,
+            footer_text=footer_text,
+            url=url,
+            exception_on_empty_embed=exception_on_empty_embed,
+            reply=reply,
+            allowed_roles=allowed_roles,
+        )