Retrieve Field Permissions for All Fields in an Object

public with sharing class FieldPermissionsChecker {

    @AuraEnabled
    public static Map getFieldPermissions(String objectName) {
        Map fieldAccessMap = new Map();
        
        // Get object schema
        Schema.SObjectType sObjectType = Schema.getGlobalDescribe().get(objectName);
        if (sObjectType == null) {
            throw new AuraHandledException('Object not found: ' + objectName);
        }
        
        // Get field map and iterate through each field
        Map fields = sObjectType.getDescribe().fields.getMap();
        
        for (String fieldName : fields.keySet()) {
            Schema.DescribeFieldResult fieldDescribe = fields.get(fieldName).getDescribe();
            
            // Determine access level: "edit" if updateable, "read" if only accessible
            if (fieldDescribe.isUpdateable()) {
                fieldAccessMap.put(fieldName, 'edit');
            } else if (fieldDescribe.isAccessible()) {
                fieldAccessMap.put(fieldName, 'read');
            }
        }
        
        return fieldAccessMap;
    }
}


import { LightningElement, api, track, wire } from 'lwc';
import getFieldPermissions from '@salesforce/apex/FieldPermissionsChecker.getFieldPermissions';

export default class FieldPermissionsLWC extends LightningElement {
    @api objectName; // e.g., 'Account'
    @track fieldPermissionsMap = {};

    connectedCallback() {
        this.loadFieldPermissions();
    }

    loadFieldPermissions() {
        getFieldPermissions({ objectName: this.objectName })
            .then(result => {
                this.fieldPermissionsMap = result;
                console.log('Field Permissions:', this.fieldPermissionsMap);
            })
            .catch(error => {
                console.error('Error fetching field permissions:', error);
            });
    }

    isFieldEditable(fieldName) {
        return this.fieldPermissionsMap[fieldName] === 'edit';
    }

    isFieldReadable(fieldName) {
        return this.fieldPermissionsMap[fieldName] === 'read' || this.isFieldEditable(fieldName);
    }
}