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| import { HistoryRecord } from "./types"; | |
| const SESSION_STORAGE_KEY = "heartflow_session_log_v2"; | |
| /** | |
| * Retrieves the clinical log for the current active browser session. | |
| * Always returns an isolated, empty list on a new tab or fresh visit. | |
| */ | |
| export function getSessionHistory(): HistoryRecord[] { | |
| if (typeof window === "undefined") return []; | |
| try { | |
| const raw = sessionStorage.getItem(SESSION_STORAGE_KEY); | |
| if (!raw) return []; | |
| return JSON.parse(raw); | |
| } catch (e) { | |
| console.warn("Session storage access error", e); | |
| return []; | |
| } | |
| } | |
| /** | |
| * Appends a telemetry snapshot or anomaly event to the active session log. | |
| */ | |
| export function appendSessionHistory(record: Omit<HistoryRecord, "id">): HistoryRecord { | |
| const current = getSessionHistory(); | |
| const newRecord: HistoryRecord = { | |
| ...record, | |
| id: Date.now() | |
| }; | |
| const updated = [newRecord, ...current].slice(0, 100); // retain up to 100 recent entries in active session | |
| if (typeof window !== "undefined") { | |
| try { | |
| sessionStorage.setItem(SESSION_STORAGE_KEY, JSON.stringify(updated)); | |
| } catch (e) { | |
| console.warn("Could not save to sessionStorage", e); | |
| } | |
| } | |
| return newRecord; | |
| } | |
| /** | |
| * Purges the active session log. | |
| */ | |
| export function clearSessionHistory(): void { | |
| if (typeof window !== "undefined") { | |
| try { | |
| sessionStorage.removeItem(SESSION_STORAGE_KEY); | |
| } catch (e) { | |
| console.warn("Could not clear sessionStorage", e); | |
| } | |
| } | |
| } | |
| /** | |
| * Exports current session records as a structured CSV file. | |
| */ | |
| export function downloadSessionCSV(records: HistoryRecord[]): void { | |
| if (!records || records.length === 0) return; | |
| const headers = [ | |
| "Log_ID", | |
| "Timestamp_UTC", | |
| "Heart_Rate_BPM", | |
| "SpO2_Percent", | |
| "Systolic_BP_mmHg", | |
| "Diastolic_BP_mmHg", | |
| "Body_Temp_C", | |
| "Clinical_Diagnosis", | |
| "Confidence_Score", | |
| "Risk_Flag" | |
| ]; | |
| const rows = records.map(r => [ | |
| r.id, | |
| `"${r.timestamp}"`, | |
| r.heart_rate, | |
| r.spo2, | |
| r.sys_bp, | |
| r.dia_bp, | |
| r.body_temp, | |
| `"${r.prediction_label}"`, | |
| r.confidence.toFixed(4), | |
| r.is_at_risk ? "ANOMALY_DETECTED" : "NORMAL" | |
| ]); | |
| const csvContent = [headers.join(","), ...rows.map(row => row.join(","))].join("\n"); | |
| const blob = new Blob([csvContent], { type: "text/csv;charset=utf-8;" }); | |
| const url = URL.createObjectURL(blob); | |
| const a = document.createElement("a"); | |
| const filename = `heartflow_session_${new Date().toISOString().replace(/[:.]/g, "-")}.csv`; | |
| a.href = url; | |
| a.download = filename; | |
| document.body.appendChild(a); | |
| a.click(); | |
| document.body.removeChild(a); | |
| URL.revokeObjectURL(url); | |
| } | |
| /** | |
| * Exports current session records as structured JSON. | |
| */ | |
| export function downloadSessionJSON(records: HistoryRecord[]): void { | |
| if (!records || records.length === 0) return; | |
| const dataStr = JSON.stringify({ | |
| session_exported_at: new Date().toISOString(), | |
| total_records: records.length, | |
| telemetry_records: records | |
| }, null, 2); | |
| const blob = new Blob([dataStr], { type: "application/json" }); | |
| const url = URL.createObjectURL(blob); | |
| const a = document.createElement("a"); | |
| const filename = `heartflow_session_${new Date().toISOString().replace(/[:.]/g, "-")}.json`; | |
| a.href = url; | |
| a.download = filename; | |
| document.body.appendChild(a); | |
| a.click(); | |
| document.body.removeChild(a); | |
| URL.revokeObjectURL(url); | |
| } | |