74 lines
1.8 KiB
TypeScript
74 lines
1.8 KiB
TypeScript
import "server-only";
|
|
|
|
export type AgentPsdTemplateFileFormat = "psd" | "psb" | "unknown";
|
|
|
|
export interface AgentPsdTemplateFileInspection {
|
|
signature: string;
|
|
version: number;
|
|
format: AgentPsdTemplateFileFormat;
|
|
channels: number;
|
|
height: number;
|
|
width: number;
|
|
depth: number;
|
|
colorMode: number;
|
|
}
|
|
|
|
export const AGENT_PSD_TEMPLATE_INVALID_FORMAT_MESSAGE =
|
|
"模板文件格式不正确，请上传 Photoshop PSD / PSB 文件。";
|
|
|
|
export const AGENT_PSD_TEMPLATE_INCOMPATIBLE_PSB_MESSAGE =
|
|
"当前 PSB 文件包含现有解析器暂不兼容的图层扩展信息，请在 Photoshop 中另存为 PSD 后再上传解析。";
|
|
|
|
export function inspectAgentPsdTemplateFile(
|
|
value: ArrayBuffer | Buffer
|
|
): AgentPsdTemplateFileInspection {
|
|
const buffer = Buffer.isBuffer(value)
|
|
? value
|
|
: Buffer.from(value);
|
|
|
|
if (buffer.byteLength < 26) {
|
|
return {
|
|
signature: "",
|
|
version: 0,
|
|
format: "unknown",
|
|
channels: 0,
|
|
height: 0,
|
|
width: 0,
|
|
depth: 0,
|
|
colorMode: 0,
|
|
};
|
|
}
|
|
|
|
const signature = buffer.subarray(0, 4).toString("ascii");
|
|
const version = buffer.readUInt16BE(4);
|
|
const format =
|
|
signature === "8BPS" && version === 1
|
|
? "psd"
|
|
: signature === "8BPS" && version === 2
|
|
? "psb"
|
|
: "unknown";
|
|
|
|
return {
|
|
signature,
|
|
version,
|
|
format,
|
|
channels: buffer.readUInt16BE(12),
|
|
height: buffer.readUInt32BE(14),
|
|
width: buffer.readUInt32BE(18),
|
|
depth: buffer.readUInt16BE(22),
|
|
colorMode: buffer.readUInt16BE(24),
|
|
};
|
|
}
|
|
|
|
export function assertSupportedAgentPsdTemplateFile(
|
|
value: ArrayBuffer | Buffer
|
|
) {
|
|
const inspection = inspectAgentPsdTemplateFile(value);
|
|
|
|
if (inspection.format === "psd" || inspection.format === "psb") {
|
|
return inspection;
|
|
}
|
|
|
|
throw new Error(AGENT_PSD_TEMPLATE_INVALID_FORMAT_MESSAGE);
|
|
}
|