feat: start logging token usage and subscriptions (#2)

### Explanation

_No response_

### Issue

_No response_

### Attestations

- [x] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [x] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [x] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [x] I have pinned the dependencies to a specific patch version.

### Style

- [x] I have run the linter and resolved any errors.
- [x] My pull request uses an appropriate title, matching the conventional commit standards.
- [x] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [x] All new and existing tests pass locally with my changes.
- [x] Code coverage remains at or above the configured threshold.

### Documentation

_No response_

### Versioning

Minor - My pull request introduces a new non-breaking feature.

Reviewed-on: #2
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

package.json

@@ -22,8 +22,8 @@
   },
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+    "@nhcarrigan/logger": "1.0.0",
     "discord.js": "14.18.0",
-    "fastify": "5.2.1",
+    "fastify": "5.2.1"
-    "winston": "3.17.0"
   }
 }

pnpm-lock.yaml

@@ -11,15 +11,15 @@ importers:
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-
   validate-npm-package-license@3.0.4:
     resolution: {integrity: sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==}
 
@@ -2277,14 +2197,6 @@ packages:
     engines: {node: '>=8'}
     hasBin: true
 
-  winston-transport@4.9.0:
-    resolution: {integrity: sha512-8drMJ4rkgaPo1Me4zD/3WLfI/zPdA9o2IipKODunnGDcuqbHwjsbB79ylv04LCGGzU0xQ6vTznOMpQGaLhhm6A==}
-    engines: {node: '>= 12.0.0'}
-
-  winston@3.17.0:
-    resolution: {integrity: sha512-DLiFIXYC5fMPxaRg832S6F5mJYvePtmO5G9v9IgUFPhXm9/GkXarH/TUrBAVzhTCzAj9anE/+GjrgXp/54nOgw==}
-    engines: {node: '>= 12.0.0'}
-
   word-wrap@1.2.5:
     resolution: {integrity: sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==}
     engines: {node: '>=0.10.0'}
@@ -2327,14 +2239,6 @@ snapshots:
 
   '@babel/helper-validator-identifier@7.25.9': {}
 
-  '@colors/colors@1.6.0': {}
-
-  '@dabh/diagnostics@2.0.3':
-    dependencies:
-      colorspace: 1.1.4
-      enabled: 2.0.0
-      kuler: 2.0.0
-
   '@discordjs/builders@1.10.1':
     dependencies:
       '@discordjs/formatters': 0.6.0
@@ -2588,6 +2492,8 @@ snapshots:
       - eslint-import-resolver-webpack
       - supports-color
 
+  '@nhcarrigan/logger@1.0.0': {}
+
   '@nhcarrigan/typescript-config@4.0.0(typescript@5.7.3)':
     dependencies:
       typescript: 5.7.3
@@ -2707,8 +2613,6 @@ snapshots:
 
   '@types/normalize-package-data@2.4.4': {}
 
-  '@types/triple-beam@1.3.5': {}
-
   '@types/ws@8.5.14':
     dependencies:
       '@types/node': 22.13.1
@@ -3033,8 +2937,6 @@ snapshots:
 
   async-function@1.0.0: {}
 
-  async@3.2.6: {}
-
   asynckit@0.4.0: {}
 
   atomic-sleep@1.0.0: {}
@@ -3116,33 +3018,12 @@ snapshots:
     dependencies:
       escape-string-regexp: 1.0.5
 
-  color-convert@1.9.3:
-    dependencies:
-      color-name: 1.1.3
-
   color-convert@2.0.1:
     dependencies:
       color-name: 1.1.4
 
-  color-name@1.1.3: {}
-
   color-name@1.1.4: {}
 
-  color-string@1.9.1:
-    dependencies:
-      color-name: 1.1.4
-      simple-swizzle: 0.2.2
-
-  color@3.2.1:
-    dependencies:
-      color-convert: 1.9.3
-      color-string: 1.9.1
-
-  colorspace@1.1.4:
-    dependencies:
-      color: 3.2.1
-      text-hex: 1.0.0
-
   combined-stream@1.0.8:
     dependencies:
       delayed-stream: 1.0.0
@@ -3245,8 +3126,6 @@ snapshots:
 
   electron-to-chromium@1.5.97: {}
 
-  enabled@2.0.0: {}
-
   error-ex@1.3.2:
     dependencies:
       is-arrayish: 0.2.1
@@ -3650,8 +3529,6 @@ snapshots:
     dependencies:
       reusify: 1.0.4
 
-  fecha@4.2.3: {}
-
   file-entry-cache@8.0.0:
     dependencies:
       flat-cache: 4.0.1
@@ -3683,8 +3560,6 @@ snapshots:
 
   flatted@3.3.2: {}
 
-  fn.name@1.1.0: {}
-
   for-each@0.3.4:
     dependencies:
       is-callable: 1.2.7
@@ -3818,8 +3693,6 @@ snapshots:
 
   indent-string@4.0.0: {}
 
-  inherits@2.0.4: {}
-
   internal-slot@1.1.0:
     dependencies:
       es-errors: 1.3.0
@@ -3836,8 +3709,6 @@ snapshots:
 
   is-arrayish@0.2.1: {}
 
-  is-arrayish@0.3.2: {}
-
   is-async-function@2.1.1:
     dependencies:
       async-function: 1.0.0
@@ -3915,8 +3786,6 @@ snapshots:
     dependencies:
       call-bound: 1.0.3
 
-  is-stream@2.0.1: {}
-
   is-string@1.1.1:
     dependencies:
       call-bound: 1.0.3
@@ -3997,8 +3866,6 @@ snapshots:
     dependencies:
       json-buffer: 3.0.1
 
-  kuler@2.0.0: {}
-
   levn@0.4.1:
     dependencies:
       prelude-ls: 1.2.1
@@ -4026,15 +3893,6 @@ snapshots:
 
   lodash@4.17.21: {}
 
-  logform@2.7.0:
-    dependencies:
-      '@colors/colors': 1.6.0
-      '@types/triple-beam': 1.3.5
-      fecha: 4.2.3
-      ms: 2.1.3
-      safe-stable-stringify: 2.5.0
-      triple-beam: 1.4.1
-
   loose-envify@1.4.0:
     dependencies:
       js-tokens: 4.0.0
@@ -4138,10 +3996,6 @@ snapshots:
 
   on-exit-leak-free@2.1.2: {}
 
-  one-time@1.0.0:
-    dependencies:
-      fn.name: 1.1.0
-
   optionator@0.9.4:
     dependencies:
       deep-is: 0.1.4
@@ -4280,12 +4134,6 @@ snapshots:
       parse-json: 5.2.0
       type-fest: 0.6.0
 
-  readable-stream@3.6.2:
-    dependencies:
-      inherits: 2.0.4
-      string_decoder: 1.3.0
-      util-deprecate: 1.0.2
-
   real-require@0.2.0: {}
 
   reflect.getprototypeof@1.0.10:
@@ -4375,8 +4223,6 @@ snapshots:
       has-symbols: 1.1.0
       isarray: 2.0.5
 
-  safe-buffer@5.2.1: {}
-
   safe-push-apply@1.0.0:
     dependencies:
       es-errors: 1.3.0
@@ -4462,10 +4308,6 @@ snapshots:
 
   siginfo@2.0.0: {}
 
-  simple-swizzle@0.2.2:
-    dependencies:
-      is-arrayish: 0.3.2
-
   slash@3.0.0: {}
 
   slashes@3.0.12: {}
@@ -4497,8 +4339,6 @@ snapshots:
 
   split2@4.2.0: {}
 
-  stack-trace@0.0.10: {}
-
   stackback@0.0.2: {}
 
   std-env@3.8.0: {}
@@ -4547,10 +4387,6 @@ snapshots:
       define-properties: 1.2.1
       es-object-atoms: 1.1.1
 
-  string_decoder@1.3.0:
-    dependencies:
-      safe-buffer: 5.2.1
-
   strip-bom@3.0.0: {}
 
   strip-indent@3.0.0:
@@ -4570,8 +4406,6 @@ snapshots:
       '@pkgr/core': 0.1.1
       tslib: 2.8.1
 
-  text-hex@1.0.0: {}
-
   thread-stream@3.1.0:
     dependencies:
       real-require: 0.2.0
@@ -4594,8 +4428,6 @@ snapshots:
 
   tr46@0.0.3: {}
 
-  triple-beam@1.4.1: {}
-
   ts-api-utils@1.4.3(typescript@5.7.3):
     dependencies:
       typescript: 5.7.3
@@ -4683,8 +4515,6 @@ snapshots:
     dependencies:
       punycode: 2.3.1
 
-  util-deprecate@1.0.2: {}
-
   validate-npm-package-license@3.0.4:
     dependencies:
       spdx-correct: 3.2.0
@@ -4816,26 +4646,6 @@ snapshots:
       siginfo: 2.0.0
       stackback: 0.0.2
 
-  winston-transport@4.9.0:
-    dependencies:
-      logform: 2.7.0
-      readable-stream: 3.6.2
-      triple-beam: 1.4.1
-
-  winston@3.17.0:
-    dependencies:
-      '@colors/colors': 1.6.0
-      '@dabh/diagnostics': 2.0.3
-      async: 3.2.6
-      is-stream: 2.0.1
-      logform: 2.7.0
-      one-time: 1.0.0
-      readable-stream: 3.6.2
-      safe-stable-stringify: 2.5.0
-      stack-trace: 0.0.10
-      triple-beam: 1.4.1
-      winston-transport: 4.9.0
-
   word-wrap@1.2.5: {}
 
   ws@8.18.0: {}

prod.env

@@ -1,2 +1,3 @@
 DISCORD_TOKEN="op://Environment Variables - Naomi/Cordelia Taryne/discord_token"
 AI_TOKEN="op://Environment Variables - Naomi/Cordelia Taryne/ai_token"
+LOG_TOKEN="op://Environment Variables - Naomi/Alert Server/api_auth"

src/index.ts

@@ -12,7 +12,7 @@ import { proofread } from "./modules/proofread.js";
 import { query } from "./modules/query.js";
 import { summarise } from "./modules/summarise.js";
 import { instantiateServer } from "./server/serve.js";
-import { logHandler } from "./utils/logHandler.js";
+import { logger } from "./utils/logger.js";
 
 const commands: Record<
   string,
@@ -41,8 +41,16 @@ client.on(Events.InteractionCreate, (interaction) => {
   }
 });
 
+client.on(Events.EntitlementCreate, (entitlement) => {
+  void logger.log("info", `User ${entitlement.userId} has subscribed!`);
+});
+
+client.on(Events.EntitlementDelete, (entitlement) => {
+  void logger.log("info", `User ${entitlement.userId} has unsubscribed... :c`);
+});
+
 client.on(Events.ClientReady, () => {
-  logHandler.info("Bot is ready.");
+  void logger.log("debug", "Bot is ready.");
 });
 
 instantiateServer();

src/modules/alt.ts

@@ -6,6 +6,7 @@
 import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
 import { personality } from "../config/personality.js";
 import { ai } from "../utils/ai.js";
+import { calculateCost } from "../utils/calculateCost.js";
 import { isSubscribed } from "../utils/isSubscribed.js";
 import type { ImageBlockParam } from "@anthropic-ai/sdk/resources/index.js";
 
@@ -109,4 +110,7 @@ export const alt = async(
     response?.text
       ?? "I'm sorry, I don't have an answer for that. Please try again later.",
   );
+
+  const { usage } = messages;
+  await calculateCost(usage, interaction.user.username, "alt-text");
 };

src/modules/evaluate.ts

@@ -6,6 +6,7 @@
 import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
 import { personality } from "../config/personality.js";
 import { ai } from "../utils/ai.js";
+import { calculateCost } from "../utils/calculateCost.js";
 import { isSubscribed } from "../utils/isSubscribed.js";
 
 /**
@@ -40,4 +41,7 @@ export const evaluate = async(
     response?.text
       ?? "I'm sorry, I don't have an answer for that. Please try again later.",
   );
+
+  const { usage } = messages;
+  await calculateCost(usage, interaction.user.username, "evaluate");
 };

src/modules/mood.ts

@@ -6,6 +6,7 @@
 import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
 import { personality } from "../config/personality.js";
 import { ai } from "../utils/ai.js";
+import { calculateCost } from "../utils/calculateCost.js";
 import { isSubscribed } from "../utils/isSubscribed.js";
 
 /**
@@ -41,4 +42,7 @@ export const mood = async(
     response?.text
       ?? "I'm sorry, I don't have an answer for that. Please try again later.",
   );
+
+  const { usage } = messages;
+  await calculateCost(usage, interaction.user.username, "mood");
 };

src/modules/proofread.ts

@@ -6,6 +6,7 @@
 import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
 import { personality } from "../config/personality.js";
 import { ai } from "../utils/ai.js";
+import { calculateCost } from "../utils/calculateCost.js";
 import { isSubscribed } from "../utils/isSubscribed.js";
 
 /**
@@ -41,4 +42,7 @@ export const proofread = async(
     response?.text
       ?? "I'm sorry, I don't have an answer for that. Please try again later.",
   );
+
+  const { usage } = messages;
+  await calculateCost(usage, interaction.user.username, "proofread");
 };

src/modules/query.ts

@@ -6,6 +6,7 @@
 import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
 import { personality } from "../config/personality.js";
 import { ai } from "../utils/ai.js";
+import { calculateCost } from "../utils/calculateCost.js";
 import { isSubscribed } from "../utils/isSubscribed.js";
 
 /**
@@ -41,4 +42,7 @@ export const query = async(
     response?.text
       ?? "I'm sorry, I don't have an answer for that. Please try again later.",
   );
+
+  const { usage } = messages;
+  await calculateCost(usage, interaction.user.username, "query");
 };

src/modules/summarise.ts

@@ -6,6 +6,7 @@
 import { MessageFlags, type ChatInputCommandInteraction } from "discord.js";
 import { personality } from "../config/personality.js";
 import { ai } from "../utils/ai.js";
+import { calculateCost } from "../utils/calculateCost.js";
 import { isSubscribed } from "../utils/isSubscribed.js";
 
 /**
@@ -41,4 +42,7 @@ export const summarise = async(
     response?.text
       ?? "I'm sorry, I don't have an answer for that. Please try again later.",
   );
+
+  const { usage } = messages;
+  await calculateCost(usage, interaction.user.username, "summarise");
 };

src/server/serve.ts

@@ -5,7 +5,7 @@
  */
 
 import fastify from "fastify";
-import { logHandler } from "../utils/logHandler.js";
+import { logger } from "../utils/logger.js";
 
 const html = `<!DOCTYPE html>
 <html>
@@ -60,12 +60,16 @@ export const instantiateServer = (): void => {
 
     server.listen({ port: 5002 }, (error) => {
       if (error) {
-        logHandler.error(error);
+        void logger.error("instantiate server", error);
         return;
       }
-      logHandler.info("Server listening on port 5002.");
+      void logger.log("debug", "Server listening on port 5002.");
     });
   } catch (error) {
-    logHandler.error(error);
+    if (error instanceof Error) {
+      void logger.error("instantiate server", error);
+      return;
+    }
+    void logger.error("instantiate server", new Error("Unknown error"));
   }
 };

src/utils/calculateCost.ts

@@ -0,0 +1,30 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { logger } from "./logger.js";
+import type { Usage } from "@anthropic-ai/sdk/resources/index.js";
+
+/**
+ * Calculates the cost of a command run by a user, and sends to
+ * our logging service.
+ * @param usage -- The usage payload from Anthropic.
+ * @param uuid -- The Discord ID of the user who ran the command.
+ * @param command -- The command that was run.
+ */
+export const calculateCost = async(
+  usage: Usage,
+  uuid: string,
+  command: string,
+): Promise<void> => {
+  const inputCost = usage.input_tokens * (3 / 1_000_000);
+  const outputCost = usage.output_tokens * (15 / 1_000_000);
+  const totalCost = inputCost + outputCost;
+  await logger.log(
+    "info",
+    `User ${uuid} ran \`${command}\` which accepted ${usage.input_tokens.toString()} and generated ${usage.output_tokens.toString()}.
+    
+    Total cost: ${totalCost.toLocaleString("en-GB", { currency: "USD", style: "currency" })}`,
+  );
+};

src/utils/logHandler.ts

@@ -1,31 +0,0 @@
-/**
- * @copyright nhcarrigan
- * @license Naomi's Public License
- * @author Naomi Carrigan
- */
-import { createLogger, format, transports, config } from "winston";
-
-const { combine, timestamp, colorize, printf } = format;
-
-/**
- * Standard log handler, using winston to wrap and format
- * messages. Call with `logHandler.log(level, message)`.
- * @param {string} level - The log level to use.
- * @param {string} message - The message to log.
- */
-export const logHandler = createLogger({
-  exitOnError: false,
-  format:      combine(
-    timestamp({
-      format: "YYYY-MM-DD HH:mm:ss",
-    }),
-    colorize(),
-    printf((info) => {
-      // eslint-disable-next-line @typescript-eslint/restrict-template-expressions -- Winston properties...
-      return `${info.level}: ${info.timestamp}: ${info.message}`;
-    }),
-  ),
-  level:      "silly",
-  levels:     config.npm.levels,
-  transports: [ new transports.Console() ],
-});

src/utils/logger.ts

@@ -0,0 +1,12 @@
+/**
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { Logger } from "@nhcarrigan/logger";
+
+export const logger = new Logger(
+  "Cordelia Taryne",
+  process.env.LOG_TOKEN ?? "",
+);