Nested object iteration - object

Question

Fighting with this one for a while now...
I'm trying to modify each image object by adding more keys-values and changing some values.
As the keys are not having the same names, I need to identify the images by .hasOwnProperty('formats')
The object can be even more nested not only with key-values pairs but with arrays as well (this is where it gets complicated)
const object = {
name: "help",
mainImage: {
name: "picture1",
formats: {
small: {
name: "small_picture1",
},
medium: {
name: "medium_picture1",
},
large: {
name: "large_picture1",
},
},
},
carousel: [
{
name: "picture2",
formats: {
small: {
name: "small_picture2",
},
medium: {
name: "medium_picture2",
},
large: {
name: "large_picture2",
},
},
},
{
name: "picture3",
formats: {
small: {
name: "small_picture3",
},
medium: {
name: "medium_picture3",
},
large: {
name: "large_picture3",
},
},
},
],
nestedPage: {
name: "moreHelp",
mainImage: {
name: "picture4",
formats: {
small: {
name: "small_picture4",
},
medium: {
name: "medium_picture4",
},
large: {
name: "large_picture4",
},
},
},
carousel: [
{
name: "picture5",
formats: {
small: {
name: "small_picture5",
},
medium: {
name: "medium_picture5",
},
large: {
name: "large_picture5",
},
},
},
{
name: "picture5",
formats: {
small: {
name: "small_picture5",
},
medium: {
name: "medium_picture5",
},
large: {
name: "large_picture5",
},
},
},
],
},
};
This is what I tried, but it only goes to a certain level.
const customSanitizer = (entity) => {
const isObject = (value) => {
return !!(value && typeof value === "object" && !Array.isArray(value));
};
if (isObject(entity)) {
Object.entries(entity).forEach(([key, value]) => {
if (isObject(entity[key])) {
if (value.hasOwnProperty("formats")) {
entity[key] = formatImageObject(value);
} else {
customSanitizer(entity[key]);
}
} else {
customSanitizer(entity[key]);
}
});
}
if (Array.isArray(entity)) {
entity.forEach((node) => {
customSanitizer(node);
});
}
}