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Check if a user is present in the local database or not

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This commit is contained in:
Pierre 2017-11-02 14:27:56 +01:00
parent 019dc275fb
commit 1e0c867217
4 changed files with 83 additions and 10 deletions
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2
app/src/main/java/org/communiquons/android/comunic/client/data/DatabaseContract.java
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@ -19,7 +19,7 @@ public final class DatabaseContract {
public static final String DATABASE_NAME = "database.db";
/* Users info table */
public static abstract class UsersInfo implements BaseColumns {
public static abstract class UsersInfoSchema implements BaseColumns {
public static final String TABLE_NAME = "users_info";
public static final String COLUMN_NAME_USER_ID = "user_id";

16
app/src/main/java/org/communiquons/android/comunic/client/data/DatabaseHelper.java
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@ -4,7 +4,7 @@ import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import org.communiquons.android.comunic.client.data.DatabaseContract.UsersInfo;
import org.communiquons.android.comunic.client.data.DatabaseContract.UsersInfoSchema;
/**
* Database helper. This file handles the creation / upgrade of the local database
@ -26,16 +26,16 @@ public class DatabaseHelper extends SQLiteOpenHelper {
* Creation and deletion of the users info table
*/
private static final String SQL_CREATE_USERS_INFOS_TABLE =
"CREATE TABLE " + UsersInfo.TABLE_NAME + " (" +
UsersInfo._ID + " INTEGER PRIMARY KEY," +
UsersInfo.COLUMN_NAME_USER_ID + INTEGER_TYPE + COMMA_SEP +
UsersInfo.COLUMN_NAME_USER_FIRSTNAME + TEXT_TYPE + COMMA_SEP +
UsersInfo.COLUMN_NAME_USER_LASTNAME + TEXT_TYPE + COMMA_SEP +
UsersInfo.COLUMN_NAME_USER_ACCOUNT_IMAGE + TEXT_TYPE
"CREATE TABLE " + UsersInfoSchema.TABLE_NAME + " (" +
UsersInfoSchema._ID + " INTEGER PRIMARY KEY," +
UsersInfoSchema.COLUMN_NAME_USER_ID + INTEGER_TYPE + COMMA_SEP +
UsersInfoSchema.COLUMN_NAME_USER_FIRSTNAME + TEXT_TYPE + COMMA_SEP +
UsersInfoSchema.COLUMN_NAME_USER_LASTNAME + TEXT_TYPE + COMMA_SEP +
UsersInfoSchema.COLUMN_NAME_USER_ACCOUNT_IMAGE + TEXT_TYPE
+ " )";
private static final String SQL_DELETE_USERS_INFOS_TABLE = "DROP TABLE IF EXISTS " +
UsersInfo.TABLE_NAME;
UsersInfoSchema.TABLE_NAME;

2
app/src/main/java/org/communiquons/android/comunic/client/data/UserInfo.java → app/src/main/java/org/communiquons/android/comunic/client/data/UsersInfo/UserInfo.java
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@ -1,4 +1,4 @@
package org.communiquons.android.comunic.client.data;
package org.communiquons.android.comunic.client.data.UsersInfo;
/**
* This class contains the informations about a single user

73
app/src/main/java/org/communiquons/android/comunic/client/data/UsersInfo/UsersInfosDbHelper.java Normal file
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@ -0,0 +1,73 @@
package org.communiquons.android.comunic.client.data.UsersInfo;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import org.communiquons.android.comunic.client.data.DatabaseContract.UsersInfoSchema;
import org.communiquons.android.comunic.client.data.DatabaseHelper;
/**
* Users informations helpers
*
* Makes the interface between the UsersInfo object and the SQLite object
*
* @author Pierre HUBERT
* Created by pierre on 11/2/17.
*/
public class UsersInfosDbHelper {
/**
* Database helper
*/
private DatabaseHelper dbHelper;
/**
* Class constructor
*
* @param dbHelper Database helper object
*/
public UsersInfosDbHelper(DatabaseHelper dbHelper){
this.dbHelper = dbHelper;
}
/**
* Check wether a user is present in the database or not
*
* @param userID The user to research on the database
* @return boolean True if the user exists / false else
*/
public boolean exists(int userID){
//Get the database
SQLiteDatabase db = dbHelper.getReadableDatabase();
//Define the condition of the research
String projection[] = {
UsersInfoSchema._ID
};
String selection = UsersInfoSchema.COLUMN_NAME_USER_ID + " = ?";
String[] selectionArgs = {""+userID};
String sortOrder = UsersInfoSchema._ID;
//Perform the request on the database
Cursor c = db.query(
UsersInfoSchema.TABLE_NAME,
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
int number_entries = c.getCount();
//Close cursor
c.close();
return number_entries > 0;
}
}