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package com.camilstaps.common;
import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import org.json.JSONException;
import java.text.ParseException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
/**
* A set of DatedStrings to store in SharedPreferences
* @author Camil Staps
*/
public class DatedStringPreferenceSet {
/**
* Get a Set from the SharedPreferences
* @param context
* @param key the SharedPreferences key
* @param type the type of DatedString to cast to
* @return the set
*/
public static Set<Object> get(Context context, String key, Class type) {
Set<Object> set = new HashSet<>();
for (String s : PreferenceManager.getDefaultSharedPreferences(context).getStringSet(key, new HashSet<String>())) {
try {
set.add(type.cast(DatedString.fromString(s, type)));
} catch (JSONException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
return set;
}
/**
* Put a Set to the SharedPreferences
* @param context
* @param key the SharedPreferences key
* @param set
*/
public static void put(Context context, String key, Set<DatedString> set) {
SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
Set<String> putSet = new HashSet<>();
for (DatedString item : set) {
putSet.add(item.toString());
}
editor.putStringSet(key, putSet);
editor.apply();
}
/**
* Add one DatedString to a set
* @param context
* @param key the SharedPreferences key
* @param object the DatedString to add
*/
public static void add(Context context, String key, DatedString object) {
Set<DatedString> set = (Set) DatedStringPreferenceSet.get(context, key, DatedString.class);
set.add(object);
DatedStringPreferenceSet.put(context, key, (Set) set);
}
/**
* Remove all DatedStrings with the same Date as the given DatedString, and put this new DatedString if any object was removed
* @param context
* @param key the SharedPreferences key
* @param object the object to 'update'
*/
public static void update(Context context, String key, DatedString object) {
Set<DatedString> set = (Set) get(context, key, object.getClass());
Iterator<DatedString> iterator = set.iterator();
boolean add = false;
while (iterator.hasNext()) {
DatedString this_object = iterator.next();
if (this_object.getDate().equals(object.getDate())) {
iterator.remove();
add = true;
}
}
if (add) {
set.add(object);
}
put(context, key, set);
}
/**
* Check if a certain Date exists as the Date of a DatedString in some set
* @param context
* @param key the SharedPreferences key
* @param date the Date
* @return
*/
public static boolean has(Context context, String key, Date date) {
Set<DatedString> set = (Set) get(context, key, DatedString.class);
for (DatedString item : set) {
if (item.getDate().equals(date)) {
return true;
}
}
return false;
}
/**
* Update the object if it already exists, or add it if it doesn't
* @see #update(android.content.Context, String, DatedString)
* @see #add(android.content.Context, String, DatedString)
* @param context
* @param key the SharedPreferences key
* @param object the object to 'update' or add
*/
public static void updateOrAdd(Context context, String key, DatedString object) {
if (has(context, key, object.getDate())) {
update(context, key, object);
} else {
add(context, key, object);
}
}
/**
* Remove all elements of a set
* @param context
* @param key the SharedPreferences key
*/
public static void clear(Context context, String key) {
put(context, key, new HashSet<DatedString>());
}
/**
* Remove all elements with a certain Date from a set
* @param context
* @param key the SharedPreferences key
* @param date the Date
*/
public static void remove(Context context, String key, Date date) {
Set<DatedString> set = (Set) get(context, key, DatedString.class);
Iterator<DatedString> iterator = set.iterator();
boolean add = false;
while (iterator.hasNext()) {
DatedString this_object = iterator.next();
if (this_object.getDate().equals(date)) {
iterator.remove();
}
}
put(context, key, set);
}
}
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