maaz519
8ce647552a
TemplateService.render(source, vars, opts) → { content, provenance }. Stored
key → resolve+render; inline → render without a DB row (key/version null);
explicit version pins. Provenance = {templateKey, version, locale, sha256(content)}.
10 tests (svc + repo).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
50 lines
1.9 KiB
TypeScript
50 lines
1.9 KiB
TypeScript
import { Injectable, NotFoundException } from '@nestjs/common';
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import { IiosMessageTemplate, IiosTemplateChannel } from '@prisma/client';
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import { PrismaService } from '../prisma/prisma.service';
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export class TemplateNotFoundError extends NotFoundException {
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constructor(key: string, channel: string, locale: string) {
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super(`no active template for key="${key}" channel=${channel} locale=${locale}`);
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this.name = 'TemplateNotFoundError';
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}
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}
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@Injectable()
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export class TemplateRepository {
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constructor(private readonly prisma: PrismaService) {}
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/**
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* Resolve the template to use: the highest active version for (key, channel, locale), preferring
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* a row owned by `scopeId` (a tenant override) and falling back to the global default (scopeId
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* NULL). Throws if neither exists.
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*/
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async resolve(
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key: string,
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channel: IiosTemplateChannel,
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locale = 'en',
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scopeId?: string,
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version?: number,
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): Promise<IiosMessageTemplate> {
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// Scoped override first, then the global default — for both the pinned and highest-active paths.
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if (scopeId) {
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const scoped = await this.pick({ key, channel, locale, scopeId }, version);
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if (scoped) return scoped;
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}
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const global = await this.pick({ key, channel, locale, scopeId: null }, version);
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if (global) return global;
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throw new TemplateNotFoundError(key, channel, locale);
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}
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/** A pinned `version` fetches that exact version (the caller was explicit); otherwise the highest
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* active version — a retracted (inactive) newest version falls back to the last good one. */
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private pick(
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where: { key: string; channel: IiosTemplateChannel; locale: string; scopeId: string | null },
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version?: number,
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) {
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return this.prisma.iiosMessageTemplate.findFirst({
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where: version != null ? { ...where, version } : { ...where, active: true },
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orderBy: { version: 'desc' },
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});
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}
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}
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