| 1 | /** |
| 2 | * What a card may hold. Pure, so it is tested apart from the service. |
| 3 | */ |
| 4 | import type { CardAction, MessageCard } from "@g1t/contracts"; |
| 5 | |
| 6 | /** A card as kept, or null when what was sent is not one. */ |
| 7 | export function cleanCard(card: unknown): MessageCard | null { |
| 8 | if (!card || typeof card !== "object") return null; |
| 9 | const c = card as Record<string, unknown>; |
| 10 | const text = (value: unknown, max: number) => (typeof value === "string" && value.trim() ? value.trim().slice(0, max) : null); |
| 11 | const kind = text(c.kind, 40); |
| 12 | const title = text(c.title, 300); |
| 13 | if (!kind || !title) return null; |
| 14 | const href = text(c.href, 2000); |
| 15 | const local = (value: string | null) => (value && value.startsWith("/") && !value.startsWith("//") ? value : null); |
| 16 | const owner = c.owner === "agents" ? "agents" : null; |
| 17 | const fields = Array.isArray(c.fields) |
| 18 | ? c.fields |
| 19 | .map((f) => (f && typeof f === "object" ? { label: text((f as Record<string, unknown>).label, 40), value: text((f as Record<string, unknown>).value, 200) } : null)) |
| 20 | .filter((f): f is { label: string; value: string } => !!f?.label && !!f.value) |
| 21 | .slice(0, 8) |
| 22 | : []; |
| 23 | const actions = Array.isArray(c.actions) |
| 24 | ? c.actions |
| 25 | .map((raw) => { |
| 26 | if (!raw || typeof raw !== "object") return null; |
| 27 | const a = raw as Record<string, unknown>; |
| 28 | const id = text(a.id, 40); |
| 29 | const label = text(a.label, 40); |
| 30 | if (!id || !label || !/^[a-z0-9_-]+$/.test(id)) return null; |
| 31 | // A link that leaves the site is dropped, not turned into an action. |
| 32 | const rawHref = text(a.href, 2000); |
| 33 | if (rawHref && !local(rawHref)) return null; |
| 34 | const input = a.input && typeof a.input === "object" ? (a.input as Record<string, unknown>) : null; |
| 35 | return { |
| 36 | id, |
| 37 | label, |
| 38 | style: a.style === "primary" || a.style === "danger" ? a.style : "default", |
| 39 | confirm: text(a.confirm, 200), |
| 40 | input: |
| 41 | input && (input.kind === "money" || input.kind === "text") |
| 42 | ? { kind: input.kind, label: text(input.label, 60) ?? "", placeholder: text(input.placeholder, 80), initial: text(input.initial, 80) } |
| 43 | : null, |
| 44 | href: local(rawHref), |
| 45 | } as CardAction; |
| 46 | }) |
| 47 | .filter((a): a is CardAction => !!a) |
| 48 | // Actions other than links need an owner to answer them. |
| 49 | .filter((a) => !!a.href || !!owner) |
| 50 | .slice(0, 5) |
| 51 | : []; |
| 52 | return { |
| 53 | kind, |
| 54 | title, |
| 55 | detail: text(c.detail, 500), |
| 56 | state: text(c.state, 80), |
| 57 | // Relative to the site only: a card never links somewhere else. |
| 58 | href: local(href), |
| 59 | ...(text(c.body, 4000) ? { body: text(c.body, 4000) } : {}), |
| 60 | ...(fields.length ? { fields } : {}), |
| 61 | ...(actions.length ? { actions } : {}), |
| 62 | ...(owner ? { owner, ref: text(c.ref, 100) } : {}), |
| 63 | }; |
| 64 | } |