$\"\"$ <Broken> & Feed
Site · Feedbin subscription
Latest published: August 1, 2026 (30d ago)
Usually publishes every 3 days

';\n\n assertEquals(html, expected);\n});\n\nDeno.test(\"buildEmailHtml renders a NEW badge for feeds not in the previous report\", () => {\n const feeds: FlaggedFeed[] = [\n {\n feedId: 2,\n title: \"Fresh Feed\",\n latestPublishedDate: \"August 1, 2026\",\n latestPublishedRelative: \"10d\",\n publishFrequency: \"2 days\",\n meanIntervalDays: 2,\n currentGapDays: 10,\n thresholdDays: 2,\n ratio: 5,\n isNew: true,\n },\n {\n feedId: 3,\n title: \"Returning Feed\",\n latestPublishedDate: \"July 1, 2026\",\n latestPublishedRelative: \"40d\",\n publishFrequency: \"4 days\",\n meanIntervalDays: 4,\n currentGapDays: 40,\n thresholdDays: 4,\n ratio: 10,\n },\n ];\n\n const html = buildEmailHtml(feeds);\n\n assertStringIncludes(html, \"Fresh Feed NEW\");\n assertStringIncludes(html, \"Returning Feed
\");\n});\n",[],[200],"25f72d59-1688-4a55-a541-489aea0c0d94","feedbin-broken-feeds.cron.tsx","368580ac-7bc1-11f1-8d5b-1607ee4eb77e",272,["D",1788637027743],48,"interval","const THRESHOLD_MULTIPLIER = 4;\nconst PREVIOUS_FEED_IDS_BLOB_KEY = \"previous-report:flagged-feed-ids\";\n\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\nimport { email } from \"https://esm.town/v/std/email\";\nimport { escape } from \"jsr:@std/html@1.0.5/entities\";\nimport {\n ENTRY_SAMPLE_SIZE, getFeedEntries, getSubscriptions, pruneCache,\n type FeedbinEntry,\n} from \"./feedbin.ts\";\nimport {\n daysFromMs,\n formatDuration,\n formatHumanDate,\n} from \"./formatting.ts\";\n\nexport type FlaggedFeed = {\n feedId: number;\n title: string;\n sitelink?: string;\n feedLink?: string;\n faviconUrl?: string;\n latestPublishedDate: string;\n latestPublishedRelative: string;\n publishFrequency: string;\n meanIntervalDays: number;\n currentGapDays: number;\n thresholdDays: number;\n ratio: number;\n isNew?: boolean;\n};\n\nexport function parseEntryTimestampMs(entry: FeedbinEntry): number | null {\n const candidate = entry.published ?? entry.created_at;\n if (!candidate) {\n return null;\n }\n\n const ms = Date.parse(candidate);\n return Number.isFinite(ms) ? ms : null;\n}\n\nexport function mean(values: number[]): number {\n if (values.length === 0) {\n return 0;\n }\n\n return values.reduce((sum, value) => sum + value, 0) / values.length;\n}\n\nexport function getFaviconUrl(siteUrl?: string): string | undefined {\n if (!siteUrl) {\n return undefined;\n }\n\n try {\n const hostname = new URL(siteUrl).hostname;\n return `https://www.google.com/s2/favicons?sz=16&domain_url=${hostname}`;\n } catch {\n return undefined;\n }\n}\n\nexport function buildEmailHtml(flaggedFeeds: FlaggedFeed[]): string {\n if (flaggedFeeds.length === 0) {\n return \"

No potentially broken feeds detected.

\";\n }\n\n const items = flaggedFeeds.map((feed) => {\n const faviconImg = feed.faviconUrl\n ? ` $\"\"$ `\n : \"\";\n const titleHtml = `${faviconImg}${escape(feed.title)}`;\n const newBadge = feed.isNew\n ? ` NEW`\n : \"\";\n const lines: string[] = [\n `${feed.feedLink ? `${titleHtml}` : titleHtml}${newBadge}`,\n ];\n\n const links: string[] = [];\n if (feed.sitelink) {\n links.push(`Site`);\n }\n if (feed.feedLink) {\n const subscriptionsUrl = `https://feedbin.com/settings/subscriptions?q=${encodeURIComponent(feed.feedLink)}`;\n links.push(`Feedbin subscription`);\n }\n if (links.length > 0) {\n lines.push(links.join(\" · \"));\n }\n\n lines.push(\n `Latest published: ${feed.latestPublishedDate} (${feed.latestPublishedRelative} ago)`,\n );\n lines.push(`Usually publishes every ${feed.publishFrequency}`);\n\n return `

${lines.join(\"
\")}

`;\n });\n\n return `

${items.join(\"\")}`;\n}\n\nexport default async function (sendEmail = true) {\n const startedAt = new Date();\n const nowMs = Date.now();\n\n const subscriptions = await getSubscriptions();\n\n const flaggedFeeds: FlaggedFeed[] = [];\n const skipReasons: string[] = [];\n\n let i = 0\n for (const subscription of subscriptions) {\n i++\n console.log(`Checking feed ${subscription.feed_id} (${subscription.title}) ${i}/${subscriptions.length}...`);\n try {\n const entries = await getFeedEntries(\n subscription.feed_id,\n ENTRY_SAMPLE_SIZE,\n );\n\n const timestamps = entries\n .map(parseEntryTimestampMs)\n .filter((ts): ts is number => ts !== null)\n .sort((a, b) => b - a);\n\n if (timestamps.length < 2) {\n skipReasons.push(`${subscription.feed_id} (${subscription.title}):insufficient_entries`);\n continue;\n }\n\n const latestPublishedMs = timestamps[0];\n const intervalsMs: number[] = [];\n\n for (let i = 0; i < timestamps.length - 1; i += 1) {\n const interval = timestamps[i] - timestamps[i + 1];\n if (interval > 0) {\n intervalsMs.push(interval);\n }\n }\n\n if (intervalsMs.length === 0) {\n skipReasons.push(`${subscription.feed_id} (${subscription.title}):non_positive_intervals`);\n continue;\n }\n\n const meanIntervalMs = mean(intervalsMs);\n if (meanIntervalMs <= 0) {\n skipReasons.push(`${subscription.feed_id} (${subscription.title}):invalid_mean_interval`);\n continue;\n }\n\n const currentGapMs = nowMs - latestPublishedMs;\n const thresholdMs = meanIntervalMs * THRESHOLD_MULTIPLIER;\n\n if (currentGapMs > thresholdMs) {\n const title = subscription.title?.trim() || `Feed ${subscription.feed_id}`;\n flaggedFeeds.push({\n feedId: subscription.feed_id,\n title,\n sitelink: subscription.site_url ?? undefined,\n feedLink: subscription.feed_url ?? undefined,\n faviconUrl: getFaviconUrl(subscription.site_url ?? undefined),\n latestPublishedDate: formatHumanDate(latestPublishedMs),\n latestPublishedRelative: formatDuration(currentGapMs, true),\n publishFrequency: formatDuration(meanIntervalMs, false),\n meanIntervalDays: daysFromMs(meanIntervalMs),\n currentGapDays: daysFromMs(currentGapMs),\n thresholdDays: daysFromMs(thresholdMs),\n ratio: currentGapMs / meanIntervalMs,\n });\n }\n } catch (error) {\n const message = error instanceof Error ? error.message : String(error);\n skipReasons.push(`${subscription.feed_id} (${subscription.title}):fetch_or_parse_error:${message}`);\n }\n }\n\n await pruneCache();\n\n flaggedFeeds.sort((a, b) => a.ratio - b.ratio);\n\n const previousFeedIds = new Set(\n await blob.getJSON(PREVIOUS_FEED_IDS_BLOB_KEY) ?? [],\n );\n for (const feed of flaggedFeeds) {\n feed.isNew = !previousFeedIds.has(feed.feedId);\n }\n await blob.setJSON(\n PREVIOUS_FEED_IDS_BLOB_KEY,\n flaggedFeeds.map((feed) => feed.feedId),\n );\n const newFeedCount = flaggedFeeds.filter((feed) => feed.isNew).length;\n\n console.log(\"Feedbin Potentially Broken Feed Check\");\n console.log(`Run timestamp: ${startedAt.toISOString()}`);\n console.log(`Subscriptions checked: ${subscriptions.length}`);\n console.log(`Potentially broken feeds: ${flaggedFeeds.length}`);\n console.log(`New since previous report: ${newFeedCount}`);\n console.log(`Skipped subscriptions: ${skipReasons.length}`);\n console.log(\"\");\n\n if (flaggedFeeds.length === 0) {\n console.log(\"No potentially broken feeds detected.\");\n } else {\n console.log(\"Potentially broken feeds:\");\n for (const [index, feed] of flaggedFeeds.entries()) {\n console.log(`${index + 1}. ${feed.title}${feed.isNew ? \" [NEW]\" : \"\"}`);\n if (feed.sitelink) {\n console.log(` Site: ${feed.sitelink}`);\n }\n if (feed.feedLink) {\n console.log(` Feed: ${feed.feedLink}`);\n console.log(\n ` Feedbin subscriptions: https://feedbin.com/settings/subscriptions?q=${encodeURIComponent(feed.feedLink)}`,\n );\n }\n console.log(\n ` Latest published: ${feed.latestPublishedDate} (${feed.latestPublishedRelative} ago)`,\n );\n console.log(` Usually publishes every ${feed.publishFrequency}`);\n console.log(\n ` Gap: ${feed.currentGapDays.toFixed(2)}d | Mean interval: ${feed.meanIntervalDays.toFixed(2)}d | Threshold (x${THRESHOLD_MULTIPLIER}): ${feed.thresholdDays.toFixed(2)}d`,\n );\n }\n }\n\n if (skipReasons.length > 0) {\n console.log(\"\");\n console.log(\"Skipped details:\");\n for (const reason of skipReasons) {\n console.log(`- ${reason}`);\n }\n }\n\n if (sendEmail) {\n await email({\n subject: `Feedbin Broken Feed Check (${flaggedFeeds.length})`,\n html: buildEmailHtml(flaggedFeeds),\n });\n }\n}\n",[],[209],"0df3a35a-b7de-4c38-aa5f-b8b286932a4d","deno.lock","fe5043e4-7d31-11f1-baff-1607ee4eb77e",24,["D",1783778909848],"{\n \"version\": \"5\",\n \"specifiers\": {\n \"jsr:@std/dotenv@*\": \"0.225.6\"\n },\n \"jsr\": {\n \"@std/dotenv@0.225.6\": {\n \"integrity\": \"1d6f9db72f565bd26790fa034c26e45ecb260b5245417be76c2279e5734c421b\"\n }\n }\n}\n",[],[219],"fe716459-bd76-4448-a7de-bcac54c52362","deno.json","3651a52a-7bc1-11f1-a542-1607ee4eb77e",250,["D",1788625553368],40,"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/98f62cee78e85bfc47c62ed703777c6bc8794f1c/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"tasks\": {\n \"check\": \"deno check --allow-import=www.val.town,jsr.io,esm.town\",\n \"test\": \"deno test --allow-import='www.val.town,jsr.io,esm.town'\"\n },\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": true,\n \"types\": [\n \"https://www.val.town/types/valtown.d.ts\"\n ],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"include\": [\n \"deno:/https/esm.town/**/*\"\n ],\n \"rules\": {\n \"exclude\": [\n \"no-explicit-any\"\n ]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[],[227],"7e83d4c1-9548-497e-bd0f-2845273dfd25","README.md","36460c6a-7bc1-11f1-bff7-1607ee4eb77e",["D",1789136757315],13,"# feedbin-feed-checker\nChecks for broken feeds in Feedbin by checking if the time since last publish is unusually long. Sends email to user listing any potentially broken feeds. Runs via a [cron trigger](https://docs.val.town/vals/cron) on val.town.\n\n## Tasks\n- `deno task check` - Check code for errors.\n- `deno task test` - Run the test suite.\n\n## Enhancements\n- [x] show badge for newly stale feeds\n- [x] cache feedbin api requests\n- [ ] calculate entry intervals using whole days\n- [ ] support ignored feeds\n\n🤖 Built w/ help from AI",[],[236],"4ccdf7ed-cf95-4029-bcf9-cd141e15fac9","AGENTS.md","364c63e4-7bc1-11f1-a71a-1607ee4eb77e",247,["D",1788625553301],8,"- Use `deno task check` to check the code for errors.\n- Use `deno task test` to run the project's test suite.\n- Use the above tasks instead of running `deno` commands directly (e.g. `deno test`) since the tasks already include the necessary permission flags.\n- If a deno task fails with a permissions error ask the user to update the permission flags in the `deno.json` file.\n- Keep validation focused on the project’s configured commands unless a more specific debug command is required.\n- Prefer small, targeted changes and verify them with the task commands above before concluding work.",[],[244],"590955ce-9ed6-459e-8e82-a343ed78ea5e",".vtignore","366ec36c-7bc1-11f1-b757-1607ee4eb77e",["D",1783620519645],".git\n.vscode\n.cursorrules\n.DS_Store\nnode_modules\nvendor",[],[253],["D",1783620519452],[],[18],"85056a9a-2358-4054-8b93-e37c1a0b4fcf",".github","7e3b6172-a241-11f1-8258-1607ee4eb77e",88,["D",1787853759938],"directory",[],[263],["D",1783616525202],{"_11":12,"_116":67},{"_11":12,"_112":-5,"_66":67,"_30":65,"_113":114,"_115":24},{"_38":103,"_13":16,"_32":35,"_104":69,"_105":-5,"_106":-5,"_107":-5,"_108":-5,"_109":-5,"_110":14,"_111":12},"ctx",{"_51":-5,"_135":307,"_308":309,"_310":311,"_312":24,"_313":24,"_314":24,"_315":141,"_316":-5,"_317":-7,"_318":-7,"_319":26,"_320":24,"_321":24,"_322":-5,"_323":24,"_324":24,"_325":24,"_326":-5},"ENV",{"_278":279,"_280":281,"_282":16,"_283":284,"_285":286,"_287":288,"_289":290,"_291":292,"_293":294,"_295":296,"_297":298,"_299":300,"_301":302,"_303":304,"_305":306},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","RENDER_GIT_COMMIT","e87eb04e707cf64e7e532c8e8ec395f209e17f15","RENDER_GIT_BRANCH","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","CLOUDFLARE_TURNSTILE_SITE_KEY","0x4AAAAAACtaIZJH7s9rBMZ6","GOOGLE_CLIENT_ID","875989696899-jtsqkhlbdv5jrlsk8631p7ipjg3c6o62.apps.googleusercontent.com","STRIPE_PUBLISHABLE_KEY","pk_live_51N2zvWEpZTTLipIkVEwXrUG9AT0yeOOEYxszarZT1jpsZV58Ly6wlg3SltZpHN26CUalOBmUSY7adQRQiSkCZz2500qSXNkf8Y","API_URL","https://api.val.town",[],"preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","preferencesCloseBrackets","preferencesChatPanelState","preferencesDprint","preferencesDenofmt","notificationCount","flagDenols","isBusinessOrgMember","businessOrgHandle","isBusinessOrgAdmin","isHigherTownieTier","navCollapsed","currentOrgId"]

History · .gitignore