New channel permissions helper (#293)

### Notes
This commit adds a new `channel-management` helper to Valkyrie which
will always ensure permissions on new channels within the `defense`
category are assigned to the same permission set as the base channel
category permissions.

It then sends a message to the newly created channel, listing the
permissions and access levels they have for quick verification on
channel permissions.

If the channel is created with different permissions than base category,
it will be overwritten by the permissions on base category. However,
permissions can also be altered after creation if needed manually.

discord-scripts/role-management.ts

@@ -0,0 +1,28 @@
+import { Client, TextChannel } from "discord.js"
+import { Robot } from "hubot"
+
+export default async function manageChannelPermissions(
+  discordClient: Client,
+  robot: Robot,
+) {
+  const { application } = discordClient
+  if (process.env.DEFENSE_CATEGORY_ID) {
+    if (application) {
+      discordClient.on("channelCreate", async (channel) => {
+        if (
+          channel.parent &&
+          channel.parentId === process.env.DEFENSE_CATEGORY_ID
+        ) {
+          const permissions = channel.parent.permissionOverwrites.cache
+          await channel.permissionOverwrites.set(permissions)
+          robot.logger.info("Channel permissions set to base category")
+          if (channel instanceof TextChannel) {
+            await channel.send(
+              "This channel now has the same base permissions as the Defense category.",
+            )
+          }
+        }
+      })
+    }
+  }
+}

infrastructure/kube/thesis-ops/valkyrie-hubot-deployment.yaml

@@ -23,15 +23,6 @@ spec:
                 secretKeyRef:
                   name: valkyrie-hubot
                   key: discord_api_token
-            - name: HUBOT_MATRIX_USER
-              value: "@valkyrie:thesis.co"
-            - name: HUBOT_MATRIX_PASSWORD
-              valueFrom:
-                secretKeyRef:
-                  name: valkyrie-hubot
-                  key: matrix_valkyrie_password
-            - name: HUBOT_MATRIX_HOST_SERVER
-              value: "https://thesisco.ems.host"
             - name: HUBOT_HOST
               valueFrom:
                 secretKeyRef:
@@ -66,6 +57,11 @@ spec:
                   key: valkyrie_alert_flow
             - name: REDIS_URL
               value: $(VALKYRIE_REDIS_SERVICE_PORT)
+            - name: DEFENSE_CATEGORY_ID
+              valueFrom:
+                secretKeyRef:
+                  name: valkyrie-hubot
+                  key: defense_category_id
             - name: GITHUB_CLIENT_ID
               valueFrom:
                 secretKeyRef: