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Nothing is\n * uploaded — the file goes straight to the share sheet or the downloads.\n *\n * Built ahead of the click: iOS Safari drops the user's tap across an await,\n * so the button only ever hands over a file that already exists.\n */\n\nconst W = 1080;\nconst H = 1350;\nconst FONT = \"-apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif\";\n\nconst esc = (s: string) =>\n\ts.replace(/&/g, '&').replace(//g, '>').replace(/\"/g, '"');\n\nexport interface ShareFrame {\n\ttitle: string;\n\tsubtitle: string;\n\t/** the page's address, without the scheme */\n\taddress: string;\n}\n\nexport function frameSvg(\n\tstage: { svg: string; width: number; height: number },\n\tframe: ShareFrame\n): string {\n\tconst pad = 72;\n\tconst top = 250;\n\tconst bottom = 150;\n\tconst boxW = W - pad * 2;\n\tconst boxH = H - top - bottom;\n\tconst scale = Math.min(boxW / stage.width, boxH / stage.height);\n\tconst w = stage.width * scale;\n\tconst h = stage.height * scale;\n\tconst x = (W - w) / 2;\n\tconst y = top + (boxH - h) / 2;\n\tconst inner = stage.svg.replace(\n\t\t'`\n\t);\n}\n\nexport function renderPng(svg: string): Promise {\n\treturn new Promise((resolve, reject) => {\n\t\tconst img = new Image();\n\t\timg.onload = () => {\n\t\t\tconst canvas = document.createElement('canvas');\n\t\t\tcanvas.width = W;\n\t\t\tcanvas.height = H;\n\t\t\tconst ctx = canvas.getContext('2d');\n\t\t\tif (!ctx) return reject(new Error('no canvas'));\n\t\t\tctx.drawImage(img, 0, 0, W, H);\n\t\t\tcanvas.toBlob((b) => (b ? resolve(b) : reject(new Error('no png'))), 'image/png');\n\t\t};\n\t\timg.onerror = () => reject(new Error('svg did not load'));\n\t\timg.src = `data:image/svg+xml;charset=utf-8,${encodeURIComponent(svg)}`;\n\t});\n}\n\n/** Touch devices get the share sheet (the only way into Photos on iOS);\n * mouse users get a plain download. Same rule as the foil card (RAT-131). */\nexport function isTouchDevice(): boolean {\n\treturn typeof window !== 'undefined' && window.matchMedia('(pointer: coarse)').matches;\n}\n\n/** Hands an already-built PNG to the share sheet, or saves it. Call it straight\n * from the click handler. Resolves to how it went out, or null if dismissed. */\nexport async function sharePng(blob: Blob, filename: string): Promise<'share' | 'download' | null> {\n\tif (isTouchDevice()) {\n\t\tconst file = new File([blob], filename, { type: 'image/png' });\n\t\tif (navigator.canShare?.({ files: [file] })) {\n\t\t\ttry {\n\t\t\t\tawait navigator.share({ files: [file] });\n\t\t\t\treturn 'share';\n\t\t\t} catch (err) {\n\t\t\t\tif ((err as Error)?.name === 'AbortError') return null;\n\t\t\t\t// anything else: fall through to a download\n\t\t\t}\n\t\t}\n\t}\n\tconst href = URL.createObjectURL(blob);\n\tconst a = document.createElement('a');\n\ta.href = href;\n\ta.download = filename;\n\tdocument.body.appendChild(a);\n\ta.click();\n\ta.remove();\n\tsetTimeout(() => URL.revokeObjectURL(href), 10_000);\n\treturn 'download';\n}\n"],"version":3}