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refactor: move to libkernel

This commit is contained in:
Derrick Hammer 2023-09-07 19:31:03 -04:00
parent d83d4892cc
commit aca55ba230
Signed by: pcfreak30
GPG Key ID: C997C339BE476FF2
1 changed files with 0 additions and 64 deletions
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64
src/objAsString.ts
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// objAsString will try to return the provided object as a string. If the
// object is already a string, it will be returned without modification. If the
// object is an 'Error', the message of the error will be returned. If the object
// has a toString method, the toString method will be called and the result
// will be returned. If the object is null or undefined, a special string will
// be returned indicating that the undefined/null object cannot be converted to
// a string. In all other cases, JSON.stringify is used. If JSON.stringify
// throws an exception, a message "[could not provide object as string]" will
// be returned.
//
// NOTE: objAsString is intended to produce human readable output. It is lossy,
// and it is not intended to be used for serialization.
function objAsString(obj: any): string {
// Check for undefined input.
if (obj === undefined) {
return "[cannot convert undefined to string]";
}
if (obj === null) {
return "[cannot convert null to string]";
}
// Parse the error into a string.
if (typeof obj === "string") {
return obj;
}
// Check if the object is an error, and return the message of the error if
// so.
if (obj instanceof Error) {
return obj.message;
}
// Check if the object has a 'toString' method defined on it. To ensure
// that we don't crash or throw, check that the toString is a function, and
// also that the return value of toString is a string.
if (Object.prototype.hasOwnProperty.call(obj, "toString")) {
if (typeof obj.toString === "function") {
const str = obj.toString();
if (typeof str === "string") {
return str;
}
}
}
// If the object does not have a custom toString, attempt to perform a
// JSON.stringify. We use a lot of bigints in libskynet, and calling
// JSON.stringify on an object with a bigint will cause a throw, so we add
// some custom handling to allow bigint objects to still be encoded.
try {
return JSON.stringify(obj, (_, v) => {
if (typeof v === "bigint") {
return v.toString();
}
return v;
});
} catch (err: any) {
if (err !== undefined && typeof err.message === "string") {
return `[stringify failed]: ${err.message}`;
}
return "[stringify failed]";
}
}
export { objAsString };