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// everything is unit-testable with fixtures.
//
// SDD-L11-T2: raw source payloads are validated with zod/mini before normalizing.
// What `??` used to absorb silently is now an explicit contract: fields the
// normalizers default are optional/nullable, but the envelope (hits/items/
// data.children) is required — a malformed payload throws one line naming the
// source and field instead of yielding a silently thinner radar.
// Runs under Node's type stripping: relative imports carry explicit `.ts` extensions.
import * as z from 'zod/mini';
import { describeIssues } from '../../src/types/schemas.ts';
export const PROFILE = {
// Keywords that define the owner's editorial profile. Matching is case-insensitive.
keywords: [
'react',
'nextjs',
'next.js',
'typescript',
'javascript',
'node',
'testing',
'jest',
'vitest',
'playwright',
'storybook',
'vercel',
'seo',
'lighthouse',
'accessibility',
'automation',
'github actions',
'iot',
'home assistant',
'ai',
'llm',
'claude',
'mcp',
'agents',
'copilot',
],
// Current professional focus — these topics rank higher when matched.
boosted: ['claude', 'mcp', 'ai', 'llm', 'agents', 'nextjs', 'next.js'],
boostFactor: 1.5,
};
/** The common shape every source is normalized into before scoring. */
export type NormalizedItem = {
title: string;
url: string;
source: string;
evidence: string;
popularity: number;
createdAt: string | undefined;
tags: string;
};
/** The subset `scoreItem` actually reads — callers may pass richer objects. */
export type ScoreInput = {
title: string;
tags?: string | undefined;
popularity: number;
createdAt?: string | undefined;
};
/**
* @description Case-insensitive profile-keyword matching against a text.
* @param text - Text to scan (usually title + tags)
* @param keywords - Keyword list
* @returns Matched keywords (unique, original casing from the list)
*/
export const matchKeywords = (text: string, keywords: string[] = PROFILE.keywords): string[] => {
const haystack = (text || '').toLowerCase();
return keywords.filter((keyword) => haystack.includes(keyword.toLowerCase()));
};
/**
* @description Exponential recency decay with a 7-day half-life.
* @param createdAt - ISO date of the item (sources may omit it — decays to the 0.5 neutral factor)
* @param now - Reference timestamp (ms)
* @returns Factor in (0, 1]
*/
export const recencyFactor = (createdAt: string | undefined, now: number, halfLifeDays = 7): number => {
const created = Date.parse(createdAt ?? '');
if (Number.isNaN(created)) return 0.5;
const ageDays = Math.max(0, (now - created) / 86_400_000);
return 2 ** (-ageDays / halfLifeDays);
};
/**
* @description Score one normalized item: popularity × keyword affinity × recency.
* Items without profile matches score 0 and are dropped by the caller.
* @param item - Normalized item (or any object carrying the scored fields)
* @param now - Reference timestamp (ms)
*/
export const scoreItem = (item: ScoreInput, now: number): { score: number; matched: string[] } => {
const matched = matchKeywords(`${item.title} ${item.tags ?? ''}`);
if (matched.length === 0) return { score: 0, matched };
const hasBoost = matched.some((keyword) => PROFILE.boosted.includes(keyword.toLowerCase()));
const affinity = (1 + matched.length) * (hasBoost ? PROFILE.boostFactor : 1);
// log10 keeps a 5000-point HN thread from drowning every other source
const popularity = Math.log10(1 + Math.max(0, item.popularity));
return { score: popularity * affinity * recencyFactor(item.createdAt, now), matched };
};
// Labels that mark an issue as triage noise rather than a topic worth writing about.
const JUNK_ISSUE_LABELS = new Set(['duplicate', 'invalid', 'wontfix', 'spam', 'stale']);
const MIN_ISSUE_ENGAGEMENT = 15;
const githubLabelSchema = z.union([z.string(), z.object({ name: z.optional(z.nullable(z.string())) })]);
const githubIssueSchema = z.object({
title: z.optional(z.nullable(z.string())),
html_url: z.optional(z.nullable(z.string())),
repository_url: z.optional(z.nullable(z.string())),
comments: z.optional(z.nullable(z.number())),
reactions: z.optional(z.nullable(z.object({ total_count: z.optional(z.nullable(z.number())) }))),
labels: z.optional(z.array(githubLabelSchema)),
created_at: z.optional(z.string()),
updated_at: z.optional(z.string()),
});
export type GithubIssue = z.infer<typeof githubIssueSchema>;
/**
* @description Keep only GitHub issues worth writing about (SDD-011): real, engaged
* discussions, not triage noise. Drops junk-labelled issues and low-engagement ones.
*/
export const isDiscussionWorthy = (issue: GithubIssue): boolean => {
const labels = (issue?.labels ?? []).map((label) =>
(typeof label === 'string' ? label : (label?.name ?? '')).toLowerCase(),
);
if (labels.some((label) => JUNK_ISSUE_LABELS.has(label))) return false;
const engagement = (issue?.comments ?? 0) + (issue?.reactions?.total_count ?? 0);
return engagement >= MIN_ISSUE_ENGAGEMENT;
};
const hnHitSchema = z.object({
title: z.optional(z.nullable(z.string())),
url: z.optional(z.nullable(z.string())),
objectID: z.optional(z.union([z.string(), z.number()])),
points: z.optional(z.nullable(z.number())),
num_comments: z.optional(z.nullable(z.number())),
created_at: z.optional(z.string()),
_tags: z.optional(z.array(z.string())),
});
const hnPayloadSchema = z.object({ hits: z.array(hnHitSchema) });
const devtoArticleSchema = z.object({
title: z.optional(z.nullable(z.string())),
url: z.optional(z.nullable(z.string())),
positive_reactions_count: z.optional(z.nullable(z.number())),
comments_count: z.optional(z.nullable(z.number())),
published_at: z.optional(z.string()),
tag_list: z.optional(z.array(z.string())),
});
const devtoPayloadSchema = z.array(devtoArticleSchema);
const redditPostSchema = z.object({
title: z.optional(z.nullable(z.string())),
permalink: z.optional(z.nullable(z.string())),
score: z.optional(z.nullable(z.number())),
num_comments: z.optional(z.nullable(z.number())),
created_utc: z.optional(z.nullable(z.number())),
subreddit: z.optional(z.nullable(z.string())),
});
const redditPayloadSchema = z.object({
data: z.object({ children: z.array(z.object({ data: redditPostSchema })) }),
});
const githubRepoSchema = z.object({
full_name: z.string(),
description: z.optional(z.nullable(z.string())),
html_url: z.optional(z.nullable(z.string())),
stargazers_count: z.optional(z.nullable(z.number())),
created_at: z.optional(z.string()),
topics: z.optional(z.array(z.string())),
});
const githubPayloadSchema = z.object({ items: z.array(githubRepoSchema) });
const githubIssuesPayloadSchema = z.object({ items: z.array(githubIssueSchema) });
/**
* @description Validate a raw source payload before normalizing. The thrown message names
* the source and the offending field (`hn payload invalid: hits.0.points expected number`),
* so `runCollector`'s stderr line says what actually broke.
*/
const parsePayload = <Schema extends z.ZodMiniType>(
schema: Schema,
source: string,
payload: unknown,
): z.infer<Schema> => {
const result = schema.safeParse(payload);
if (!result.success) throw new Error(`${source} payload invalid: ${describeIssues(result.error.issues)}`);
return result.data;
};
/** @description Normalizers: raw API payload → validated `NormalizedItem[]` */
export const normalize = {
hn: (json: unknown): NormalizedItem[] =>
parsePayload(hnPayloadSchema, 'hn', json).hits.map((hit) => ({
title: hit.title ?? '',
url: hit.url || `https://news.ycombinator.com/item?id=${hit.objectID}`,
source: 'Hacker News',
evidence: `${hit.points ?? 0} points, ${hit.num_comments ?? 0} comments`,
popularity: (hit.points ?? 0) + (hit.num_comments ?? 0),
createdAt: hit.created_at,
tags: (hit._tags ?? []).join(' '),
})),
devto: (json: unknown): NormalizedItem[] =>
parsePayload(devtoPayloadSchema, 'devto', json).map((article) => ({
title: article.title ?? '',
url: article.url ?? '',
source: 'dev.to',
evidence: `${article.positive_reactions_count ?? 0} reactions, ${article.comments_count ?? 0} comments`,
popularity: (article.positive_reactions_count ?? 0) + (article.comments_count ?? 0),
createdAt: article.published_at,
tags: (article.tag_list ?? []).join(' '),
})),
reddit: (json: unknown): NormalizedItem[] =>
parsePayload(redditPayloadSchema, 'reddit', json).data.children.map(({ data }) => ({
title: data.title ?? '',
url: `https://www.reddit.com${data.permalink ?? ''}`,
source: `r/${data.subreddit}`,
evidence: `${data.score ?? 0} upvotes, ${data.num_comments ?? 0} comments`,
popularity: (data.score ?? 0) + (data.num_comments ?? 0),
createdAt: new Date((data.created_utc ?? 0) * 1000).toISOString(),
tags: data.subreddit ?? '',
})),
github: (json: unknown): NormalizedItem[] =>
parsePayload(githubPayloadSchema, 'github', json).items.map((repo) => ({
title: `${repo.full_name}: ${repo.description ?? ''}`.trim(),
url: repo.html_url ?? '',
source: 'GitHub (new repos)',
evidence: `${repo.stargazers_count ?? 0} stars since ${repo.created_at?.slice(0, 10)}`,
popularity: repo.stargazers_count ?? 0,
createdAt: repo.created_at,
tags: (repo.topics ?? []).join(' '),
})),
// Recurring/evergreen developer pain in the stack's own repos (SDD-011). Recency is
// keyed off `updated_at`, not `created_at`: a valuable recurring issue is old but
// still active, and a 7-day decay on its creation date would wrongly drop it.
githubIssues: (json: unknown): NormalizedItem[] =>
parsePayload(githubIssuesPayloadSchema, 'githubIssues', json)
.items.filter(isDiscussionWorthy)
.map((issue) => {
const repo = (issue.repository_url ?? '').split('/repos/')[1] ?? '';
const reactions = issue.reactions?.total_count ?? 0;
const labels = (issue.labels ?? []).map((label) =>
typeof label === 'string' ? label : (label?.name ?? ''),
);
return {
title: repo ? `${repo}: ${issue.title ?? ''}`.trim() : (issue.title ?? ''),
url: issue.html_url ?? '',
source: 'GitHub issue',
evidence: `${issue.comments ?? 0} comments, ${reactions} reactions`,
popularity: (issue.comments ?? 0) + reactions,
createdAt: issue.updated_at ?? issue.created_at,
tags: `${repo} ${labels.join(' ')}`.trim(),
};
}),
};
/**
* @description Deduplicate items by URL, keeping the highest-scored occurrence.
*/
export const dedupeByUrl = <T extends { url: string; score: number }>(items: T[]): T[] => {
const byUrl = new Map<string, T>();
for (const item of items) {
const existing = byUrl.get(item.url);
if (!existing || item.score > existing.score) byUrl.set(item.url, item);
}
return [...byUrl.values()];
};
const claudePrompt = (topic: { title: string; url: string }): string =>
[
'Contexto: soy Xabier Lameiro, arquitecto de software (banca y retail: CaixaBank, Openbank, Inditex),',
'stack React/Next.js/TypeScript, y escribo en xabierlameiro.com (en/es/gl).',
`Tema trending: "${topic.title}" (${topic.url}).`,
'Escribe un BORRADOR de post (800+ palabras de prosa, además del código) que aporte valor real:',
'1) qué está pasando y por qué importa, 2) MI experiencia de primera mano con esto (pídeme los',
'detalles concretos que necesites: proyectos, métricas, errores), 3) ejemplo práctico reproducible,',
'4) conclusión con opinión. Prohibido el relleno genérico que cualquier blog podría publicar.',
'Sigue el estándar editorial del repo (docs/editorial-standard.md): E-E-A-T con experiencia',
'de primera mano, mi voz (sin muletillas de IA), estructura problema→solución y título/meta',
'benefit-led. No inventes salidas de terminal ni capturas.',
'No lo publiques: es un borrador para que yo lo revise y lo traduzca a los tres idiomas.',
].join(' ');
/** The subset `buildReport` reads per topic — scored items carry more. */
export type ReportTopic = {
title: string;
url: string;
source: string;
evidence: string;
score: number;
matched: string[];
};
export type ReportContext = {
generatedAt: string;
risingQueries?: { query: string; delta: number; impressions: number }[];
recentRepos?: { name: string; url: string; pushedAt: string | undefined }[];
};
/**
* @description Build the weekly markdown report from scored topics.
* @param topics - Scored, sorted, deduped items
* @param context - Generation date plus the optional GSC/repos sections
* @returns Markdown report
*/
export const buildReport = (
topics: ReportTopic[],
{ generatedAt, risingQueries = [], recentRepos = [] }: ReportContext,
): string => {
const lines = [
`# Trending content radar — ${generatedAt}`,
'',
'> SDD-006: this is a briefing, NOT content to publish. Pick at most one topic,',
'> draft it with Claude using the prompt, add first-hand experience, review all locales.',
'',
`## Top topics (${topics.length})`,
'',
];
topics.forEach((topic, index) => {
lines.push(
`### ${index + 1}. ${topic.title}`,
'',
`- **Source**: ${topic.source} — ${topic.evidence} — ${topic.url}`,
`- **Matched profile keywords**: ${topic.matched.join(', ')}`,
`- **Score**: ${topic.score.toFixed(2)}`,
`- **Angle**: connect it to production experience (banking/retail) or a recent repo below.`,
'',
'<details><summary>Claude drafting prompt</summary>',
'',
'```text',
claudePrompt(topic),
'```',
'',
'</details>',
'',
);
});
if (risingQueries.length > 0) {
lines.push('## Rising queries on your own GSC (28d vs previous 28d)', '');
risingQueries.forEach(({ query, delta, impressions }) =>
lines.push(`- \`${query}\` — +${delta} impressions (now ${impressions})`),
);
lines.push('');
}
if (recentRepos.length > 0) {
lines.push('## Your recently pushed repos (angle material)', '');
recentRepos.forEach(({ name, url, pushedAt }) =>
lines.push(`- [${name}](${url}) — last push ${pushedAt?.slice(0, 10)}`),
);
lines.push('');
}
return lines.join('\n');
};
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