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After it completes, the daily cron will\n * append to the same history log going forward.\n *\n * What it builds:\n * - \"created\" events → pulled from each val's createdAt timestamp\n * - \"modified\" events → pulled from every version > 1 in the versions API\n * - \"deleted\" events → not recoverable; only tracked going forward by the cron\n *\n * Output blob key: \"activity_tracker_history\"\n * Shape: Record\n */\n\nimport { blob } from \"https://esm.town/v/std/blob\";\n\ninterface ValVersion {\n version: number;\n createdAt: string;\n}\n\ninterface ValSummary {\n id: string;\n name: string;\n createdAt: string;\n}\n\ninterface DayActivity {\n created: Array<{ id: string; name: string; createdAt: string }>;\n modified: Array<{ id: string; name: string; updatedAt: string; version: number }>;\n deleted: Array<{ id: string; name: string }>;\n}\n\ntype HistoryLog = Record;\n\nconst API_BASE = \"https://api.val.town/v1\";\nconst HISTORY_KEY = \"activity_tracker_history\";\n\nfunction toDateString(iso: string): string {\n return iso.split(\"T\")[0];\n}\n\nfunction emptyDay(): DayActivity {\n return { created: [], modified: [], deleted: [] };\n}\n\nasync function fetchAllVals(apiKey: string): Promise {\n const vals: ValSummary[] = [];\n let offset = 0;\n const limit = 100;\n\n while (true) {\n const res = await fetch(`${API_BASE}/me/vals?offset=${offset}&limit=${limit}`, {\n headers: { Authorization: `Bearer ${apiKey}` },\n });\n if (!res.ok) throw new Error(`List vals failed: ${res.status} ${res.statusText}`);\n\n const data = await res.json();\n const page: any[] = data.data ?? [];\n\n for (const v of page) {\n vals.push({ id: v.id, name: v.name, createdAt: v.createdAt });\n }\n\n if (page.length < limit) break;\n offset += limit;\n }\n\n return vals;\n}\n\nasync function fetchAllVersions(apiKey: string, valId: string): Promise {\n const versions: ValVersion[] = [];\n let offset = 0;\n const limit = 100;\n\n while (true) {\n const res = await fetch(\n `${API_BASE}/vals/${valId}/versions?offset=${offset}&limit=${limit}`,\n { headers: { Authorization: `Bearer ${apiKey}` } },\n );\n\n // A 404 means the val has no version history (edge case); treat as empty\n if (res.status === 404) break;\n if (!res.ok) throw new Error(`Versions fetch failed for ${valId}: ${res.status}`);\n\n const data = await res.json();\n const page: any[] = data.data ?? [];\n\n for (const v of page) {\n versions.push({ version: v.version, createdAt: v.createdAt });\n }\n\n if (page.length < limit) break;\n offset += limit;\n }\n\n return versions;\n}\n\nexport default async function (): Promise {\n const apiKey = Deno.env.get(\"VAL_TOWN_API_KEY\");\n if (!apiKey) throw new Error(\"VAL_TOWN_API_KEY environment variable not set\");\n\n console.log(\"Fetching all vals...\");\n const vals = await fetchAllVals(apiKey);\n console.log(`Found ${vals.length} vals. Fetching version histories...`);\n\n const history: HistoryLog = {};\n\n function getDay(date: string): DayActivity {\n const d = toDateString(date);\n if (!history[d]) history[d] = emptyDay();\n return history[d];\n }\n\n for (let i = 0; i < vals.length; i++) {\n const val = vals[i];\n console.log(`[${i + 1}/${vals.length}] ${val.name}`);\n\n // Record creation event using the val's own createdAt\n getDay(val.createdAt).created.push({\n id: val.id,\n name: val.name,\n createdAt: val.createdAt,\n });\n\n // Fetch full version history; version 1 = creation (skip it), 2+ = edits\n const versions = await fetchAllVersions(apiKey, val.id);\n for (const v of versions) {\n if (v.version === 1) continue; // already recorded as a create above\n getDay(v.createdAt).modified.push({\n id: val.id,\n name: val.name,\n updatedAt: v.createdAt,\n version: v.version,\n });\n }\n }\n\n // Sort days ascending before saving\n const sortedHistory: HistoryLog = {};\n for (const day of Object.keys(history).sort()) {\n sortedHistory[day] = history[day];\n }\n\n await blob.setJSON(HISTORY_KEY, sortedHistory);\n\n const dayCount = Object.keys(sortedHistory).length;\n const totalCreates = vals.length;\n const totalEdits = Object.values(sortedHistory).reduce(\n (sum, d) => sum + d.modified.length,\n 0,\n );\n\n console.log(`\\nBackfill complete.`);\n console.log(` Days with activity : ${dayCount}`);\n console.log(` Total creates : ${totalCreates}`);\n console.log(` Total edits : ${totalEdits}`);\n console.log(` Stored under blob key: \"${HISTORY_KEY}\"`);\n\n return sortedHistory;\n}\n","deleted","label",[100],"permalink","https://www.val.town/x/shapedlines/activity_graph/code/backfillHistory.cron.ts","extension","actionData","errors"]