Add stacked bar chart of issue reactions by month with bars broken do…

…wn by reaction type

examples/nextjs-import-airbyte-github-export-seafowl/components/RepositoryAnalytics/Charts.tsx

@@ -6,6 +6,7 @@ import { SqlProvider, makeSeafowlHTTPContext } from "@madatdata/react";
 import { useMemo } from "react";
 
 import { StargazersChart } from "./charts/StargazersChart";
+import { MonthlyIssueStatsTable } from "./charts/MonthlyIssueStats";
 
 export interface ChartsProps {
   importedRepository: ImportedRepository;
@@ -29,7 +30,9 @@ export const Charts = ({ importedRepository }: ChartsProps) => {
       <SqlProvider dataContext={seafowlDataContext}>
         <h3>Stargazers</h3>
         <StargazersChart {...importedRepository} />
+        <MonthlyIssueStatsTable {...importedRepository} />
       </SqlProvider>
+      MonthlyIssueStatsTable
     </div>
   );
 };

examples/nextjs-import-airbyte-github-export-seafowl/components/RepositoryAnalytics/charts/MonthlyIssueStats.tsx

@@ -0,0 +1,144 @@
+import * as Plot from "@observablehq/plot";
+import { useSqlPlot } from "../useSqlPlot";
+import type { ImportedRepository, TargetSplitgraphRepo } from "../../../types";
+
+// Assume meta namespace contains both the meta tables, and all imported repositories and tables
+const META_NAMESPACE =
+  process.env.NEXT_PUBLIC_SPLITGRAPH_GITHUB_ANALYTICS_META_NAMESPACE;
+
+type Reaction =
+  // | "all"
+  | "plus_one"
+  | "minus_one"
+  | "laugh"
+  | "confused"
+  | "heart"
+  | "hooray"
+  | "rocket"
+  | "eyes";
+
+type MappedMonthlyIssueStatsRow = MonthlyIssueStatsRow & {
+  created_at_month: Date;
+};
+
+/**
+ * A stacked bar chart of the number of reactions each month, grouped by reaction type
+ */
+export const MonthlyIssueStats = ({
+  splitgraphNamespace,
+  splitgraphRepository,
+}: ImportedRepository) => {
+  const renderPlot = useSqlPlot({
+    sqlParams: { splitgraphNamespace, splitgraphRepository },
+    buildQuery: monthlyIssueStatsTableQuery,
+    mapRows: (r: MonthlyIssueStatsRow) => ({
+      ...r,
+      created_at_month: new Date(r.created_at_month),
+    }),
+    reduceRows: (rows: MappedMonthlyIssueStatsRow[]) => {
+      const reactions = new Map<
+        Reaction,
+        { created_at_month: Date; count: number }[]
+      >();
+
+      for (const row of rows) {
+        for (const reaction of [
+          "plus_one",
+          "minus_one",
+          "laugh",
+          "confused",
+          "heart",
+          "hooray",
+          "rocket",
+          "eyes",
+        ] as Reaction[]) {
+          if (!reactions.has(reaction)) {
+            reactions.set(reaction, []);
+          }
+
+          reactions.get(reaction)!.push({
+            created_at_month: row.created_at_month,
+            count: (() => {
+              switch (reaction) {
+                case "plus_one":
+                  return row.total_plus_ones;
+                case "minus_one":
+                  return row.total_minus_ones;
+                case "laugh":
+                  return row.total_laughs;
+                case "confused":
+                  return row.total_confused;
+                case "heart":
+                  return row.total_hearts;
+                case "hooray":
+                  return row.total_hoorays;
+                case "rocket":
+                  return row.total_rockets;
+                case "eyes":
+                  return row.total_eyes;
+              }
+            })(),
+          });
+        }
+      }
+
+      return Array.from(reactions.entries()).flatMap(([reaction, series]) =>
+        series.map((d) => ({ reaction, ...d }))
+      );
+    },
+    isRenderable: (p) => !!p.splitgraphRepository,
+
+    makePlotOptions: (issueStats) => ({
+      y: { grid: true },
+      color: { legend: true },
+      marks: [
+        Plot.rectY(issueStats, {
+          x: "created_at_month",
+          y: "count",
+          interval: "month",
+          fill: "reaction",
+        }),
+        Plot.ruleY([0]),
+      ],
+    }),
+  });
+
+  return renderPlot();
+};
+
+/** Shape of row returned by {@link monthlyIssueStatsTableQuery} */
+export type MonthlyIssueStatsRow = {
+  created_at_month: string;
+  num_issues: number;
+  total_reacts: number;
+  total_plus_ones: number;
+  total_minus_ones: number;
+  total_laughs: number;
+  total_confused: number;
+  total_hearts: number;
+  total_hoorays: number;
+  total_rockets: number;
+  total_eyes: number;
+};
+
+/** Time series of GitHub stargazers for the given repository */
+export const monthlyIssueStatsTableQuery = ({
+  splitgraphNamespace = META_NAMESPACE,
+  splitgraphRepository,
+}: TargetSplitgraphRepo) => {
+  return `SELECT
+  created_at_month,
+  count(issue_number) as num_issues,
+  sum(total_reacts) as total_reacts,
+  sum(no_plus_one) as total_plus_ones,
+  sum(no_minus_one) as total_minus_ones,
+  sum(no_laugh) as total_laughs,
+  sum(no_confused) as total_confused,
+  sum(no_heart) as total_hearts,
+  sum(no_hooray) as total_hoorays,
+  sum(no_rocket) as total_rockets,
+  sum(no_eyes) as total_eyes
+FROM "${splitgraphNamespace}/${splitgraphRepository}"."monthly_issue_stats"
+GROUP BY created_at_month
+ORDER BY created_at_month ASC;`;
+};