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ERP / App Integration

Use IntentText as the print & report engine inside an existing app (ERP, CRM, billing system) — with one dependency and no document viewer to build. Author a template once in the editor, store it in your database, then one button merges it with a record's data and produces HTML or a PDF.

.it editor  ──save .it text──▶  DB: print-template { key, source }
                                          │
record (invoice / report JSON) ───────────┤
                                          ▼
                  parseAndMerge(source, data) → renderHTML / renderPrint
                                          ▼
                                  HTML  or  PDF  (the "Print" button)

A runnable reference kit lives in the repo at demo/erp-integration/ — run pnpm demo:erp. This guide is the same pattern, explained.

Install​

npm i @dotit/core      # the one and only dependency

Everything below uses three functions from a single helper file you copy into your app (intenttext-print.mjs in the demo). It works in the browser and Node (same code).

import { parseIntentText, renderHTML, renderPrint } from "@dotit/core";

export function renderDocumentHTML(templateSource, data, opts = {}) {
  return renderHTML(parseAndMergeSafe(templateSource, data), { theme: opts.theme || "corporate" });
}
export function renderDocumentPrintHTML(templateSource, data, opts = {}) {
  return renderPrint(parseAndMergeSafe(templateSource, data), { theme: opts.theme || "corporate" });
}

(The demo's helper uses parseAndMerge directly and also ships printHTML / printDocument for the browser print dialog — see The Print button.)

1. Store the template as .it text — not an AST​

The portable, diffable, future-proof representation is the .it source string. parseAndMerge consumes it directly, so storing a parsed tree would only add a serialize step. Your template collection document is simply:

// db.collection("print-template")
{
  key: "invtemplate",          // your template id
  company: "<companyId>",      // per customer/company
  theme: "corporate",          // corporate | legal | editorial | technical | minimal | …
  source: "font: | family: Inter…\ntitle: Invoice {{invoice.number}}\n…"
}

source is exactly what the editor produces. Placeholders are {{path.to.value}}; tables repeat with each: (below). Style part of a line with an inline styled span, e.g. value: [17,325 QAR]{ size: 1.2em; weight: bold } — it prints identically here as in the editor.

Per-tenant branding goes in style: rules (v4.3) at the top of the template — house styling declared once, no per-line repetition, content stays queryable:

style: section | color: #0a7 | weight: 600
style: title | family: Georgia | size: 26pt

Each company's stored template carries its own look; the editor shows the rules as 🎨 chips and applies them live, and core prints them identically.

Saving a template from the editor​

The editor works on .it text — take that text and PUT it:

await fetch("/api/print-templates/invtemplate", {
  method: "PUT",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({ company, theme, source: editorText }),
});
// server: db.collection("print-template").updateOne(
//   { key: "invtemplate", company }, { $set: { theme, source } }, { upsert: true });

2. The data is your record's JSON​

The template's {{…}} paths resolve against whatever object you pass — shape your record to match the template (or author the template to match your record):

{
  "company":  { "name": "Jadwal Technology", "email": "…", "vat": "…" },
  "customer": { "name": "Acme Corporation", "email": "…" },
  "invoice":  { "number": "INV-2026-0042", "date": "…", "dueDate": "…", "status": "Unpaid" },
  "items":    [ { "description": "…", "qty": 1, "unitPrice": "…", "total": "…" } ],
  "totals":   { "subtotal": "…", "taxRate": 5, "tax": "…", "due": "…" }
}

The table loop — this template line repeats once per element of items, binding each to item:

| {{item.description}} | {{item.qty}} | {{item.unitPrice}} | {{item.total}} | each: items |

See Templates for the full merge semantics.

3. The Print button​

Option A — browser, zero extra deps (recommended)​

renderDocumentPrintHTML returns print-ready HTML (@page size/margins, running header/footer, page numbers); print it via a hidden iframe and the browser's native dialog → Save as PDF. No PDF library, no server round-trip — it prints exactly what you see.

async function onPrintInvoice(invoiceId) {
  const [template, invoice] = await Promise.all([
    fetch(`/api/print-templates/invtemplate`).then((r) => r.json()),
    fetch(`/api/invoices/${invoiceId}`).then((r) => r.json()),
  ]);
  printDocument(template.source, invoice, { theme: template.theme }); // merge + print
}

To show the result instead of printing, drop the HTML into an iframe/modal:

const html = renderDocumentHTML(template.source, invoice, { theme: template.theme });
document.querySelector("#preview").srcdoc = html;   // <iframe id="preview">

Option B — server, real PDF file (for emailing / archiving)​

Use @dotit/pdf — the official opt-in companion for the moments no human is at a browser (email attachments, compliance archiving, batch statement runs):

npm i @dotit/pdf
npm i puppeteer          # or: puppeteer-core + your system Chrome (CHROME_PATH)

The enterprise issue flow in one call — merge → seal (tamper-evident SHA-256) → PDF bytes:

import { issuePDF } from "@dotit/pdf";
import { verifyDocument } from "@dotit/core";

app.post("/api/invoices/:id/send", async (req, res) => {
  const template = await db.collection("print-template").findOne({ key: "invtemplate", company });
  const invoice  = await db.collection("invoices").findOne({ _id: req.params.id });

  const { source, hash, at, pdf } = await issuePDF(template.source, invoice, {
    signer: "Jadwal Billing", role: "Finance", theme: template.theme,
  });

  // 1) The sealed .it text is the LEGAL ARTIFACT — store it on the record (a few KB).
  //    Years later: verifyDocument(source).intact proves it unaltered.
  await db.collection("invoices").updateOne(
    { _id: invoice._id },
    { $set: { itSource: source, itHash: hash, issuedAt: at } },
  );
  // 2) Archive the exact bytes that were sent (object storage), then email.
  await s3.putObject({ Key: `invoices/${invoice.number}.pdf`, Body: pdf });
  await mailer.send({ attachments: [{ filename: `${invoice.number}.pdf`, content: pdf }] });
  res.json({ ok: true, hash });
});

No Chrome in your API process? issueDocument() does the same merge→seal and returns print-ready html — POST it to a rendering sidecar (e.g. Gotenberg) instead. For batch runs use createPdfRenderer() (reuses one Chrome). Full API: the @dotit/pdf README.

Receipts (80mm thermal) and other page sizes​

The same pipeline produces POS receipts — just change the template's page: size and margin. Narrow pages need a small margin (an A4-style 20mm would eat half an 80mm roll); core defaults narrow pages (≤120mm) to a tight 4mm, but set it explicitly to be sure:

font: | family: ui-monospace, monospace | size: 10pt
page: | size: 80mm auto | margin: 4mm

title: {{company.name}}
summary: Receipt {{invoice.number}}

section: Items
| Item | Qty | Total | each: items |
| {{item.description}} | {{item.qty}} | {{item.total}} |

section: Totals
metric: Total | value: {{totals.total}}
metric: Paid | value: {{totals.paid}}
text: Thank you · {{company.name}}

Keep receipt tables to 2–3 narrow columns so they fit the roll width. size: also accepts A4, A5, Letter, Legal, or any CSS size (size: 210mm 297mm).

Missing data, totals, and Arabic​

  • Missing fields print blank, not {{token}}. The kit merges with missing: "blank", so an absent optional field (e.g. {{customer.phone}}) renders empty rather than leaking the placeholder onto the document. Pass { missing: "keep" } only while authoring a template, to see which fields are unfilled.
  • Totals render as label→value rows. metric: Subtotal | value: … is a document total line (label left, amount right; a Total/Balance Due row is emphasized) — the same as the editor. A metric with target:/trend: renders as a dashboard KPI card instead.
  • Arabic / RTL works out of the box: add meta: | dir: rtl and the document (table column order, totals, running footer) lays out right-to-left. Mix Arabic and Latin freely; numbers and {{invoice.number}} stay correct via the browser's bidi handling.
  • Untrusted data is safe. Merged values are HTML-escaped, and style-property values (e.g. a per-tenant color:) can't break out of the style attribute — so invoice data from your database can't inject markup.

Why this is portable​

  • One package (@dotit/core) plus one small file you own.
  • No viewer — renderHTML returns a complete, self-contained HTML document (inline CSS); the print path reuses the browser you already have.
  • Templates are text — versionable, diffable, editable in the editor, no lock-in.
  • Same engine everywhere — the editor, this kit, and the CLI all call the same core, so what you design is what prints (including inline styled spans).