// workflow step: seo — score the post on a few SEO heuristics. Runs in PARALLEL
// with `enrich`. Output { score, warnings } (advisory; doesn't block publish).
let b = ctx.request.body;
let post = docs::collection("posts").get(b.post_id);
let d = post.data;
let warnings = [];
let score = 100;
if d.tags == () || d.tags.len() == 0 { warnings.push("no tags"); score -= 30; }
let tlen = if d.title == () { 0 } else { d.title.len() };
if tlen < 10 { warnings.push("title is short (<10 chars)"); score -= 20; }
if tlen > 70 { warnings.push("title is long (>70 chars)"); score -= 10; }
if score < 0 { score = 0; }
#{ score: score, warnings: warnings }