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file.ts
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file.ts
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import {
BufferFilePointer,
FilePointer,
PathFilePointer,
} from "@sealcode/file-manager";
import Field from "../../../chip-types/field.js";
import type Context from "../../../context.js";
import { OpenApiTypes } from "../../../schemas/open-api-types.js";
export abstract class FileStorage extends Field<
FilePointer | string,
FilePointer | [FilePointer],
string
> {
handles_large_data = true;
open_api_type: OpenApiTypes = OpenApiTypes.URI_REF;
get_default_file: (context: Context) => Promise<FilePointer>;
async isProperValue(context: Context, value: FilePointer | [FilePointer]) {
if (typeof value === "string") {
return Field.valid();
}
if (Array.isArray(value)) {
if (value.length !== 1) {
throw new Error(
"If you use array for this field, it can only have one file element"
);
}
value = value[0];
}
if (value === null || value instanceof File) {
return Field.valid();
}
if (value instanceof FilePointer) {
return Field.valid();
}
return Field.invalid(
context.i18n`This value should be a file upload or an instance of the File object.`
);
}
setParams(params: {
get_default_file: (context: Context) => Promise<FilePointer>;
}) {
this.get_default_file = params.get_default_file;
}
async encode(_: Context, file: FilePointer | [FilePointer]) {
if (file === null) {
return null;
}
if (Array.isArray(file)) {
if (file.length !== 1) {
throw new Error(
"If you use array for this field, it can only have one file element"
);
}
file = file[0];
}
let token;
if (
(file instanceof PathFilePointer && !file.has_id) ||
file instanceof BufferFilePointer
) {
token = await file.save(true);
}
return token || file.token;
}
getPostgreSqlFieldDefinitions(): string[] {
return [`"${this.name}" VARCHAR`];
}
}
/** Takes a {@File} instance as input, stores it in the FS and then decodes to a URL.
*
* **Params**:
* - `get_default_file` - ()=>Promise<{@link File}> - if no file is provided, then this file will be used in it's stead
*/
export default class FileField extends FileStorage {
typeName = "file";
async decode(
context: Context,
db_value: string | null,
__: any,
format?: "url" | "file",
is_http_api_request = false
) {
if (db_value === null || db_value == undefined) {
return null;
}
const file = await context.app.fileManager.fromToken(db_value);
if (format == undefined) {
format = is_http_api_request ? "url" : "file";
}
if (format == "file") {
return file;
} else {
return file.getURL();
}
}
}

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Default Alt Text
file.ts (2 KB)

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