Discord: add shared interactive renderer

extensions/discord/src/shared-interactive.ts

@@ -0,0 +1,44 @@
+import type { InteractiveButtonStyle, InteractiveReply } from "../../../src/interactive/payload.js";
+import type { DiscordComponentButtonStyle, DiscordComponentMessageSpec } from "./components.js";
+
+function resolveDiscordButtonStyle(
+  style?: InteractiveButtonStyle,
+): DiscordComponentButtonStyle | undefined {
+  return style ?? "secondary";
+}
+
+export function buildDiscordInteractiveComponents(
+  interactive?: InteractiveReply,
+): DiscordComponentMessageSpec | undefined {
+  const blocks: NonNullable<DiscordComponentMessageSpec["blocks"]> = [];
+  for (const block of interactive?.blocks ?? []) {
+    if (block.type === "buttons") {
+      if (block.buttons.length === 0) {
+        continue;
+      }
+      blocks.push({
+        type: "actions",
+        buttons: block.buttons.map((button) => ({
+          label: button.label,
+          style: resolveDiscordButtonStyle(button.style),
+          callbackData: button.value,
+        })),
+      });
+      continue;
+    }
+    if (block.type === "select" && block.options.length > 0) {
+      blocks.push({
+        type: "actions",
+        select: {
+          type: "string",
+          placeholder: block.placeholder,
+          options: block.options.map((option) => ({
+            label: option.label,
+            value: option.value,
+          })),
+        },
+      });
+    }
+  }
+  return blocks.length > 0 ? { blocks } : undefined;
+}