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trends: rewrite getTrendingTags to process the history in serial, split across several queries

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Alex Gleason 2024-06-15 18:14:38 -05:00
parent 1afd8a739a
commit 6ce8aae0d1
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1 changed files with 31 additions and 33 deletions
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64
src/controllers/api/trends.ts
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@ -1,4 +1,4 @@
import { NostrEvent, NStore } from '@nostrify/nostrify';
import { NostrEvent, NostrFilter, NStore } from '@nostrify/nostrify';
import { z } from 'zod';
import { AppController } from '@/app.ts';
@ -148,58 +148,56 @@ interface TrendingTag {
}
export async function getTrendingTags(store: NStore, tagName: string): Promise<TrendingTag[]> {
const filter = {
const [label] = await store.query([{
kinds: [1985],
'#L': ['pub.ditto.trends'],
'#l': [`#${tagName}`],
authors: [Conf.pubkey],
limit: 1,
};
}]);
const [label] = await store.query([filter]);
if (!label) return [];
if (!label) {
return [];
}
const date = new Date(label.created_at * 1000);
const lastWeek = new Date(date.getTime() - Time.days(7));
const dates = generateDateRange(lastWeek, date).reverse();
const tags = label.tags.filter(([name]) => name === tagName);
const results: TrendingTag[] = [];
const labelDate = new Date(label.created_at * 1000);
const lastWeek = new Date(labelDate.getTime() - Time.days(7));
const dates = generateDateRange(lastWeek, labelDate).reverse();
for (const [name, value] of label.tags) {
if (name !== tagName) continue;
return Promise.all(tags.map(async ([_, value]) => {
const filters = dates.map((date) => ({
...filter,
[`#${tagName}`]: [value],
since: Math.floor(date.getTime() / 1000),
until: Math.floor((date.getTime() + Time.days(1)) / 1000),
}));
const history: TrendingTag['history'] = [];
const labels = await store.query(filters);
for (const date of dates) {
const [label] = await store.query([{
kinds: [1985],
'#L': ['pub.ditto.trends'],
'#l': [`#${tagName}`],
[`#${tagName}`]: [value],
authors: [Conf.pubkey],
since: Math.floor(date.getTime() / 1000),
until: Math.floor((date.getTime() + Time.days(1)) / 1000),
limit: 1,
} as NostrFilter]);
const history = dates.map((date) => {
const label = labels.find((label) => {
const since = Math.floor(date.getTime() / 1000);
const until = Math.floor((date.getTime() + Time.days(1)) / 1000);
return label.created_at >= since && label.created_at < until;
});
const [, , , accounts, uses] = label?.tags.find(([n, v]) => n === tagName && v === value) ?? [];
const [, , , accounts, uses] = label?.tags.find((tag) => tag[0] === tagName && tag[1] === value) ?? [];
return {
history.push({
day: Math.floor(date.getTime() / 1000),
authors: Number(accounts || 0),
uses: Number(uses || 0),
};
});
});
}
return {
results.push({
name: tagName,
value,
history,
};
}));
});
}
return results;
}
export { trendingLinksController, trendingStatusesController, trendingTagsController };