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FromSerializableObjectOptions,
ToSerializableObjectOptions,
fromSerializableObject,
toSerializableObject
} from '@cardano-sdk/util';
import omit from 'lodash/omit.js';
const PouchDbDocMetadata = ['_id', '_rev', '_attachments', '_conflicts', '_revisions', '_revs_info'] as const;
type PouchDbDocMetadata = typeof PouchDbDocMetadata[number];
type PouchDbDoc = {
[k in PouchDbDocMetadata]: unknown;
};
const transformationTypeKey = 'transformed_type_';
const TRANSFORMED_KEY_PREFIX = 'transformed_key_';
const serializeOptions: ToSerializableObjectOptions = {
serializeKey: (key) => {
if (key.startsWith('_')) {
return `${TRANSFORMED_KEY_PREFIX}${key}`;
}
return key;
},
transformationTypeKey
};
const deserializeOptions: FromSerializableObjectOptions = {
deserializeKey: (key) => {
if (key.startsWith(TRANSFORMED_KEY_PREFIX)) {
return key.slice(TRANSFORMED_KEY_PREFIX.length);
}
return key;
},
transformationTypeKey
};
// PouchDb doesn't know how to store bigint and Map
// toPouchDbDoc/fromPouchDbDoc converts to/from plain json objects
export const toPouchDbDoc = <T>(obj: T): unknown => {
Iif (Array.isArray(obj)) {
const value = obj.map((item) => toSerializableObject(item, serializeOptions));
return {
[transformationTypeKey]: 'Array',
value
};
}
return toSerializableObject(obj, serializeOptions);
};
export const fromPouchDbDoc = <T>(doc: unknown): T => {
if (typeof doc === 'object') {
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const docAsAny = doc as any;
Iif (docAsAny[transformationTypeKey] === 'Array')
return docAsAny.value.map((val: unknown) => fromSerializableObject(val, deserializeOptions));
}
return fromSerializableObject(doc, deserializeOptions);
};
// PouchDB adds some metadata on docs when you query them.
// Best to keep the objects used by the wallet clean.
// Would be great to have generic constraints on PouchDb stores, to say "not extends {_id, _rev...}".
// Don't think it's possible.
export const sanitizePouchDbDoc = <T>(doc: T & Partial<PouchDbDoc>): T =>
fromPouchDbDoc(omit(doc, PouchDbDocMetadata)) as T;
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