There are multiple fields in an object like this.
{
"image-processing": {
"type": "lib",
"data": {
"files": [
{
"file": "libs/photography/processing/.babelrc",
"hash": "62d50f586b2880f9d58ca4e9a84914c6a0d4936d"
},
{
"file": "libs/photography/processing/src/lib/processing.ts",
"hash": "a285d3554f264cc60f35bef6180298badb0478d1",
"deps": [
"npm:gm",
"npm:mongodb"
]
}
]
}
},
"image-processing-2": {
"type": "lib",
"data": {
"files": [
{
"file": "libs/photography/processing/.babelrc",
"hash": "62d50f586b2880f9d58ca4e9a84914c6a0d4936d",
"deps": [
"npm:gm",
"npm:faker"
]
},
{
"file": "libs/photography/processing/src/lib/processing.ts",
"hash": "a285d3554f264cc60f35bef6180298badb0478d1",
"deps": [
"npm:gm",
"npm:mongodb"
]
}
]
}
}
}
I only need the type and the content of data.files.deps as value object for the key.
As you can see each file has an optional deps array. All deps values should be merged.
So the result should be:
{
"image-processing": { type: "lib", packages: [ "npm:gm", "npm:mongodb" ] },
"image-processing-2": { type: "lib", packages: [ "npm:faker", "npm:gm", "npm:mongodb" ] }
}
I tried to iterate through the object, but this would overwrite the value instead of adding new package names to the value:
const result = {}
Object.entries(data).map(([key, value]) => {
result[key].type = value.type
result[key].packages = value?.data?.files.map(d => d.deps)
})
Use flatMap instead of map so that you have a flattened array of dependency strings - and alternate with the empty array so that undefined .deps properties don't cause problems.
const data={"image-processing":{type:"lib",data:{files:[{file:"libs/photography/processing/.babelrc",hash:"62d50f586b2880f9d58ca4e9a84914c6a0d4936d"},{file:"libs/photography/processing/src/lib/processing.ts",hash:"a285d3554f264cc60f35bef6180298badb0478d1",deps:["npm:gm","npm:mongodb"]}]}},"image-processing-2":{type:"lib",data:{files:[{file:"libs/photography/processing/.babelrc",hash:"62d50f586b2880f9d58ca4e9a84914c6a0d4936d",deps:["npm:gm","npm:faker"]},{file:"libs/photography/processing/src/lib/processing.ts",hash:"a285d3554f264cc60f35bef6180298badb0478d1",deps:["npm:gm","npm:mongodb"]}]}}};
const output = Object.fromEntries(
Object.entries(data).map(([key, value]) => [
key,
{
type: 'lib',
packages: [...new Set(value.data.files.flatMap(file => file.deps ?? []))]
}
])
);
console.log(output);Based on your new comments, just to separate the logic out a little:
Iterate over the Object.entries to get a key/value pair (the value is the object), and then iterate over the files of each object. If there are any deps filter out the "npm" ones, then map over that array and create a new one with the updated names.
Add that array to the packages array.
Finally flatten the packages array, dedupe it by creating a new Set from it, and then spreading that back out into an array as the value of the packages object you then add to the output object using the key.
const data={"image-processing":{type:"lib",data:{files:[{file:"libs/photography/processing/.babelrc",hash:"62d50f586b2880f9d58ca4e9a84914c6a0d4936d"},{file:"libs/photography/processing/src/lib/processing.ts",hash:"a285d3554f264cc60f35bef6180298badb0478d1",deps:["npm:gm","npm:mongodb"]}]}},"image-processing-2":{type:"lib",data:{files:[{file:"libs/photography/processing/.babelrc",hash:"62d50f586b2880f9d58ca4e9a84914c6a0d4936d",deps:["npm:gm","npm:faker"]},{file:"libs/photography/processing/src/lib/processing.ts",hash:"a285d3554f264cc60f35bef6180298badb0478d1",deps:["npm:gm","npm:mongodb"]}]}}};
// Output object
const out = {};
// Iterate over the object entries
for (const [key, obj] of Object.entries(data)) {
// Destructure the type, and the files
// array from each object
const { type, data: { files } } = obj;
const packages = [];
// Iterate over each `files` array
for (const file of files) {
if (file.deps) {
// `filter` out the "npm" names, and
// then `map` over that array to update the names
const list = file.deps
.filter(dep => dep.startsWith('npm:'))
.map(dep => dep.replace('npm:', ''));
// Bang that completed array into `packages`
packages.push(list);
}
}
// Finally create a new key/value on the output
// object by setting the value as an object
// with `type`, and the flattened, deduped packages array
out[key] = {
type,
packages: [...new Set(packages.flat())]
};
}
console.log(out);