Gather all logged runs in a standard date format

datastores/run_data.ts

@@ -1,4 +1,7 @@
 import { DefineDatastore, Schema } from "deno-slack-sdk/mod.ts";
+import { SlackAPIClient } from "deno-slack-sdk/types.ts";
+import { DatastoreItem } from "deno-slack-api/types.ts";
+import { DatastoreQueryResponse } from "deno-slack-api/typed-method-types/apps.ts";
 
 export const RUN_DATASTORE = "running_datastore";
 
@@ -21,4 +24,44 @@ const RunningDatastore = DefineDatastore({
   },
 });
 
+/**
+ * Returns the complete collection from the datastore for an expression
+ *
+ * @param client the client to interact with the Slack API
+ * @param expressions optional filters and attributes to refine a query
+ *
+ * @returns ok if the query completed successfully
+ * @returns items a list of responses from the datastore
+ * @returns error the description of any server error
+ */
+export async function queryRunningDatastore(
+  client: SlackAPIClient,
+  expressions?: object,
+): Promise<{
+  ok: boolean;
+  items: DatastoreItem<typeof RunningDatastore.definition>[];
+  error?: string;
+}> {
+  const items: DatastoreItem<typeof RunningDatastore.definition>[] = [];
+  let cursor = undefined;
+
+  do {
+    const runs: DatastoreQueryResponse<typeof RunningDatastore.definition> =
+      await client.apps.datastore.query<typeof RunningDatastore.definition>({
+        datastore: RUN_DATASTORE,
+        cursor,
+        ...expressions,
+      });
+
+    if (!runs.ok) {
+      return { ok: false, items, error: runs.error };
+    }
+
+    cursor = runs.response_metadata?.next_cursor;
+    items.push(...runs.items);
+  } while (cursor);
+
+  return { ok: true, items };
+}
+
 export default RunningDatastore;

functions/collect_runner_stats.ts

@@ -1,5 +1,5 @@
 import { DefineFunction, Schema, SlackFunction } from "deno-slack-sdk/mod.ts";
-import RunningDatastore, { RUN_DATASTORE } from "../datastores/run_data.ts";
+import { queryRunningDatastore } from "../datastores/run_data.ts";
 import { RunnerStatsType } from "../types/runner_stats.ts";
 
 export const CollectRunnerStatsFunction = DefineFunction({
@@ -16,6 +16,7 @@ export const CollectRunnerStatsFunction = DefineFunction({
       runner_stats: {
         type: Schema.types.array,
         items: { type: RunnerStatsType },
+        title: "Runner stats",
         description: "Weekly and all-time total distances for runners",
       },
     },
@@ -24,28 +25,27 @@ export const CollectRunnerStatsFunction = DefineFunction({
 });
 
 export default SlackFunction(CollectRunnerStatsFunction, async ({ client }) => {
-  // Query the datastore for all the data we collected
-  const runs = await client.apps.datastore.query<
-    typeof RunningDatastore.definition
-  >({ datastore: RUN_DATASTORE });
-
-  if (!runs.ok) {
-    return { error: `Failed to retrieve past runs: ${runs.error}` };
-  }
-
   const runners = new Map<typeof Schema.slack.types.user_id, {
     runner: typeof Schema.slack.types.user_id;
     total_distance: number;
     weekly_distance: number;
   }>();
 
-  const startOfLastWeek = new Date();
-  startOfLastWeek.setDate(startOfLastWeek.getDate() - 6);
+  const today = new Date(Date.now());
+  const startOfLastWeek = new Date(
+    new Date(Date.now()).setDate(today.getDate() - 6),
+  );
+
+  // Query the datastore for all the data we collected
+  const runs = await queryRunningDatastore(client);
+  if (!runs.ok) {
+    return { error: `Failed to retrieve past runs: ${runs.error}` };
+  }
 
   // Add run statistics to the associated runner
   runs.items.forEach((run) => {
-    const isRecentRun = run.rundate >=
-      startOfLastWeek.toLocaleDateString("en-CA", { timeZone: "UTC" });
+    const isRecentRun =
+      run.rundate >= startOfLastWeek.toISOString().substring(0, 10);
 
     // Find existing runner record or create new one
     const runner = runners.get(run.runner) ||

functions/collect_runner_stats_test.ts

@@ -0,0 +1,47 @@
+import * as mf from "mock-fetch/mod.ts";
+import { SlackFunctionTester } from "deno-slack-sdk/mod.ts";
+import { assertEquals } from "std/testing/asserts.ts";
+import CollectRunnerStatsFunction from "./collect_runner_stats.ts";
+import { DatastoreItem } from "deno-slack-api/types.ts";
+import RunningDatastore from "../datastores/run_data.ts";
+
+// Mocked date for stable testing
+Date.now = () => new Date("2023-01-06").getTime();
+
+// Collection of runs stored in the mocked datastore
+const mockRuns: DatastoreItem<typeof RunningDatastore.definition>[] = [
+  { id: "R006", runner: "U0123456", distance: 4, rundate: "2023-01-06" },
+  { id: "R005", runner: "U0123456", distance: 2, rundate: "2023-01-06" },
+  { id: "R004", runner: "U7777777", distance: 2, rundate: "2023-01-03" },
+  { id: "R003", runner: "U0123456", distance: 4, rundate: "2022-12-31" },
+  { id: "R002", runner: "U7777777", distance: 1, rundate: "2022-12-10" },
+  { id: "R001", runner: "U0123456", distance: 2, rundate: "2022-11-11" },
+];
+
+// Replaces globalThis.fetch with the mocked copy
+mf.install();
+
+mf.mock("POST@/api/apps.datastore.query", () => {
+  return new Response(JSON.stringify({ ok: true, items: mockRuns }));
+});
+
+const { createContext } = SlackFunctionTester("collect_runner_stats");
+
+Deno.test("Collect runner stats", async () => {
+  const { outputs, error } = await CollectRunnerStatsFunction(
+    createContext({ inputs: {} }),
+  );
+
+  const expectedStats = [{
+    runner: "U0123456",
+    weekly_distance: 10,
+    total_distance: 12,
+  }, {
+    runner: "U7777777",
+    weekly_distance: 2,
+    total_distance: 3,
+  }];
+
+  assertEquals(error, undefined);
+  assertEquals(outputs?.runner_stats, expectedStats);
+});

functions/collect_team_stats.ts

@@ -1,6 +1,6 @@
 import { DefineFunction, Schema, SlackFunction } from "deno-slack-sdk/mod.ts";
 import { SlackAPIClient } from "deno-slack-sdk/types.ts";
-import RunningDatastore, { RUN_DATASTORE } from "../datastores/run_data.ts";
+import { queryRunningDatastore } from "../datastores/run_data.ts";
 
 export const CollectTeamStatsFunction = DefineFunction({
   callback_id: "collect_team_stats",
@@ -15,10 +15,12 @@ export const CollectTeamStatsFunction = DefineFunction({
     properties: {
       weekly_distance: {
         type: Schema.types.number,
+        title: "Weekly distance",
         description: "Total number of miles ran last week",
       },
       percent_change: {
         type: Schema.types.number,
+        title: "Percent change",
         description: "Percent change of miles ran compared to the prior week",
       },
     },
@@ -27,17 +29,21 @@ export const CollectTeamStatsFunction = DefineFunction({
 });
 
 export default SlackFunction(CollectTeamStatsFunction, async ({ client }) => {
-  const today = new Date();
+  const today = new Date(Date.now());
 
   // Collect runs from the past week (days 0-6)
-  const lastWeekStartDate = new Date(new Date().setDate(today.getDate() - 6));
+  const lastWeekStartDate = new Date(
+    new Date(Date.now()).setDate(today.getDate() - 6),
+  );
   const lastWeekDistance = await distanceInWeek(client, lastWeekStartDate);
   if (lastWeekDistance.error) {
     return { error: lastWeekDistance.error };
   }
 
   // Collect runs from the prior week (days 7-13)
-  const priorWeekStartDate = new Date(new Date().setDate(today.getDate() - 13));
+  const priorWeekStartDate = new Date(
+    new Date(Date.now()).setDate(today.getDate() - 13),
+  );
   const priorWeekDistance = await distanceInWeek(client, priorWeekStartDate);
   if (priorWeekDistance.error) {
     return { error: priorWeekDistance.error };
@@ -58,26 +64,32 @@ export default SlackFunction(CollectTeamStatsFunction, async ({ client }) => {
   };
 });
 
-// Sum all logged runs in the seven days following startDate
+/**
+ * Sum all logged runs in the seven days following startDate
+ *
+ * @param client the client to interact with the Slack API
+ * @param startDate the beginning of the week to measure
+ *
+ * @returns total the sum of miles run over the measured week
+ * @returns error the description of any server error
+ */
 async function distanceInWeek(
   client: SlackAPIClient,
   startDate: Date,
 ): Promise<{ total: number; error?: string }> {
   const endDate = new Date(startDate);
   endDate.setDate(endDate.getDate() + 6);
 
-  const runs = await client.apps.datastore.query<
-    typeof RunningDatastore.definition
-  >({
-    datastore: RUN_DATASTORE,
+  const expressions = {
     expression: "#date BETWEEN :start_date AND :end_date",
     expression_attributes: { "#date": "rundate" },
     expression_values: {
-      ":start_date": startDate.toLocaleDateString("en-CA", { timeZone: "UTC" }),
-      ":end_date": endDate.toLocaleDateString("en-CA", { timeZone: "UTC" }),
+      ":start_date": startDate.toISOString().substring(0, 10),
+      ":end_date": endDate.toISOString().substring(0, 10),
     },
-  });
+  };
 
+  const runs = await queryRunningDatastore(client, expressions);
   if (!runs.ok) {
     return { total: 0, error: `Failed to retrieve past runs: ${runs.error}` };
   }

functions/collect_team_stats_test.ts

@@ -0,0 +1,65 @@
+import * as mf from "mock-fetch/mod.ts";
+import { assertEquals } from "std/testing/asserts.ts";
+import { SlackFunctionTester } from "deno-slack-sdk/mod.ts";
+import { DatastoreItem } from "deno-slack-api/types.ts";
+import CollectTeamStatsFunction from "./collect_team_stats.ts";
+import RunningDatastore from "../datastores/run_data.ts";
+
+// Mocked date for stable testing
+Date.now = () => new Date("2023-01-06").getTime();
+
+// Collection of runs stored in the mocked datastore
+let mockRuns: DatastoreItem<typeof RunningDatastore.definition>[];
+
+// Replaces globalThis.fetch with the mocked copy
+mf.install();
+
+mf.mock("POST@/api/apps.datastore.query", async (args) => {
+  const body = await args.formData();
+  const dates = JSON.parse(body.get("expression_values") as string);
+  const runs = mockRuns.filter((run) => (
+    run.rundate >= dates[":start_date"] && run.rundate <= dates[":end_date"]
+  ));
+  return new Response(JSON.stringify({ ok: true, items: runs }));
+});
+
+const { createContext } = SlackFunctionTester("collect_team_stats");
+
+Deno.test("Retrieve the empty set", async () => {
+  mockRuns = [];
+  const { outputs, error } = await CollectTeamStatsFunction(
+    createContext({ inputs: {} }),
+  );
+  assertEquals(error, undefined);
+  assertEquals(outputs?.weekly_distance, 0);
+  assertEquals(outputs?.percent_change, 0);
+});
+
+Deno.test("Count only runs from the past week", async () => {
+  mockRuns = [
+    { id: "R006", runner: "U0123456", distance: 8, rundate: "2023-01-07" },
+    { id: "R005", runner: "U0123456", distance: 4, rundate: "2023-01-06" },
+    { id: "R004", runner: "U7777777", distance: 2, rundate: "2023-01-02" },
+    { id: "R003", runner: "U0123456", distance: 4, rundate: "2022-12-31" },
+    { id: "R002", runner: "U7777777", distance: 6, rundate: "2022-12-31" },
+    { id: "R001", runner: "U8888888", distance: 1, rundate: "2022-12-30" },
+  ];
+  const { outputs, error } = await CollectTeamStatsFunction(
+    createContext({ inputs: {} }),
+  );
+  assertEquals(error, undefined);
+  assertEquals(outputs?.weekly_distance, 16);
+  assertEquals(outputs?.percent_change, 1500);
+});
+
+Deno.test("Handle the infinite change", async () => {
+  mockRuns = [
+    { id: "R001", runner: "U0123456", distance: 10, rundate: "2023-01-05" },
+  ];
+  const { outputs, error } = await CollectTeamStatsFunction(
+    createContext({ inputs: {} }),
+  );
+  assertEquals(error, undefined);
+  assertEquals(outputs?.weekly_distance, 10);
+  assertEquals(outputs?.percent_change, 0);
+});

functions/format_leaderboard.ts

@@ -10,16 +10,19 @@ export const FormatLeaderboardFunction = DefineFunction({
     properties: {
       team_distance: {
         type: Schema.types.number,
+        title: "Team distance",
         description: "Total number of miles ran last week for the team",
       },
       percent_change: {
         type: Schema.types.number,
+        title: "Percent change",
         description:
           "Percent change of miles ran compared to the prior week for the team",
       },
       runner_stats: {
         type: Schema.types.array,
         items: { type: RunnerStatsType },
+        title: "Runner stats",
         description: "Weekly and all-time total distances for runners",
       },
     },
@@ -29,10 +32,12 @@ export const FormatLeaderboardFunction = DefineFunction({
     properties: {
       teamStatsFormatted: {
         type: Schema.types.string,
+        title: "Formatted team stats",
         description: "A formatted message with team stats",
       },
       runnerStatsFormatted: {
         type: Schema.types.string,
+        title: "Formatted runner stats",
         description: "An ordered leaderboard of runner stats",
       },
     },

functions/format_leaderboard_test.ts

@@ -0,0 +1,38 @@
+import { SlackFunctionTester } from "deno-slack-sdk/mod.ts";
+import { assertEquals, assertStringIncludes } from "std/testing/asserts.ts";
+import FormatLeaderboardFunction from "./format_leaderboard.ts";
+
+const { createContext } = SlackFunctionTester("format_leaderboard");
+
+Deno.test("Collect team stats", async () => {
+  const inputs = {
+    team_distance: 11,
+    percent_change: 50,
+    runner_stats: [{
+      runner: "U0123456",
+      weekly_distance: 4,
+      total_distance: 8,
+    }, {
+      runner: "U7777777",
+      weekly_distance: 2,
+      total_distance: 3,
+    }],
+  };
+
+  const { outputs, error } = await FormatLeaderboardFunction(
+    createContext({ inputs }),
+  );
+
+  assertEquals(error, undefined);
+  assertStringIncludes(outputs?.teamStatsFormatted || "", "11 miles");
+  assertStringIncludes(outputs?.teamStatsFormatted || "", "50%");
+
+  assertStringIncludes(
+    outputs?.runnerStatsFormatted || "",
+    "<@U0123456> ran 4 miles last week (8 total)",
+  );
+  assertStringIncludes(
+    outputs?.runnerStatsFormatted || "",
+    "<@U7777777> ran 2 miles last week (3 total)",
+  );
+});

functions/log_run_test.ts

@@ -1,6 +1,6 @@
 import * as mf from "mock-fetch/mod.ts";
 import { SlackFunctionTester } from "deno-slack-sdk/mod.ts";
-import { assertEquals } from "https://deno.land/std@0.153.0/testing/asserts.ts";
+import { assertEquals } from "std/testing/asserts.ts";
 import LogRunFunction from "./log_run.ts";
 
 // Replaces global fetch with the mocked copy
@@ -16,7 +16,7 @@ Deno.test("Successfully save a run", async () => {
   const inputs = {
     runner: "U0123456",
     distance: 4,
-    rundate: "2022-01-22",
+    rundate: "2023-01-13",
   };
 
   const { error } = await LogRunFunction(createContext({ inputs }));