Paragraph

import { paragraph } from "docxcelerate";
import type { SampleData } from "../sample-data.ts";

/** The smallest useful node: an id, and a render that turns data into a line. */
export const Greeting = paragraph<SampleData>({
  id: "greeting",
  render: (data) => `Dear ${data.memberName},`,
});

import { paragraph } from "docxcelerate";
import { money, type SampleData } from "../sample-data.ts";

/**
 * Branching lives in the render, not the template: one node and one id,
 * whichever branch a member falls down.
 */
export const PriceChange = paragraph<SampleData>({
  id: "price-change",
  render: (data) => {
    const delta = data.newPrice - data.lastPrice;

    if (delta === 0) {
      return `Your ${data.plan} membership renews at ${money(data.newPrice)} ` +
        `a year — the same price you paid last year.`;
    }

    const direction = delta > 0 ? "rising" : "falling";
    const percent = Math.abs((delta / data.lastPrice) * 100).toFixed(1);

    return `Your ${data.plan} membership is ${direction} by ${percent}%, from ` +
      `${money(data.lastPrice)} to ${money(data.newPrice)} a year. That is ` +
      `${money(data.newPrice / 12)} a month from ${data.renewsOn}.`;
  },
});

import { paragraph } from "docxcelerate";
import type { SampleData } from "../sample-data.ts";

/**
 * The minimum a dynamic paragraph needs: one prompt, and a placeholder so the
 * preview still reads as a letter.
 */
export const NextSteps = paragraph<SampleData>({
  id: "next-steps",
  placeholder: (data) =>
    `Your membership renews automatically on ${data.renewsOn}. ` +
    `Nothing is needed from you unless you want to change plan.`,
  generalPrompt: (data) =>
    `In two sentences, tell ${data.memberName} that their membership renews ` +
    `automatically on ${data.renewsOn} and how to change plan before then.`,
});

import { paragraph } from "docxcelerate";
import { money, type SampleData } from "../sample-data.ts";

/**
 * All four slots: general says what to write, info supplies facts without
 * asking for them back, negative fences off the failure modes, system fixes
 * the voice. `availableTokens` is the budget the build allotted this node.
 */
export const Apology = paragraph<SampleData>({
  id: "pool-closure",
  placeholder: () =>
    `The main pool is closed for resurfacing until 12 October. ` +
    `The teaching pool and all land-based classes are running as normal.`,
  systemPrompt: () =>
    `You write for a public leisure centre. Plain British English, second ` +
    `person, no marketing language.`,
  generalPrompt: (data, availableTokens) =>
    `Apologise to ${data.memberName} for the main pool closure and say what ` +
    `is still open. At most ${Math.floor(availableTokens / 4)} words.`,
  infoPrompt: (data) =>
    `The main pool at ${data.centreName} is resurfacing until 12 October. ` +
    `The teaching pool, gym and classes are unaffected. Members on ` +
    `${data.plan} paying ${money(data.newPrice)} a year get two guest passes ` +
    `as compensation.`,
  negativePrompt: () =>
    `Do not promise a refund, do not give a reopening date beyond 12 October, ` +
    `and do not restate the price.`,
});