java/tool/DataUtils.java

/*
 * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//与backup部分库类似，不再赘述
package net.micode.notes.tool;

import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.OperationApplicationException;
import android.database.Cursor;
import android.os.RemoteException;
import android.util.Log;

import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;

import java.util.ArrayList;
import java.util.HashSet;


public class DataUtils {
    public static final String TAG = "DataUtils";
    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
        // 检查提供的ID集合是否为null
        if (ids == null) {
            Log.d(TAG, "the ids is null");
            return true;
        }
        // 检查ID集合是否为空
        if (ids.size() == 0) {
            Log.d(TAG, "no id is in the hashset");
            return true;
        }
        // TODO: 实现根据提供的ids批量删除笔记的逻辑
        return false;
    }
}

       public boolean deleteNotes(long[] ids) {
    // 创建一个内容提供者操作的列表，用于存储删除操作
    ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
    
    // 遍历所有给定的ID
    for (long id : ids) {
        // 检查ID是否为系统根文件夹ID，如果是则跳过删除操作
        if(id == Notes.ID_ROOT_FOLDER) {
            Log.e(TAG, "Don't delete system folder root");
            continue;
        }
        // 为每个非系统根文件夹ID构建一个删除操作，并添加到操作列表中
        ContentProviderOperation.Builder builder = ContentProviderOperation
                .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
        operationList.add(builder.build());
    }
    
    try {
        // 执行内容提供者操作列表中的所有操作
        ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
        
        // 检查删除操作的结果，如果没有成功删除任何笔记，则返回false
        if (results == null || results.length == 0 || results[0] == null) {
            Log.d(TAG, "delete notes failed, ids:" + ids.toString());
            return false;
        }
        // 所有删除操作执行成功，返回true
        return true;
    } catch (RemoteException e) {
        // 处理执行删除操作时可能出现的远程异常
        Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
    } catch (OperationApplicationException e) {
        // 处理执行删除操作时可能出现的操作应用异常
        Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
    }
    // 如果有任何异常发生，则返回false
    return false;
}

    /**
 * 将指定的笔记移动到新的文件夹中。
 * 
 * @param resolver 内容解析器，用于执行数据库操作。
 * @param id 笔记的ID，表示要移动的笔记。
 * @param srcFolderId 源文件夹ID，表示当前笔记所在的文件夹。
 * @param desFolderId 目标文件夹ID，表示要将笔记移动到的新文件夹。
 */
public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
    ContentValues values = new ContentValues();
    values.put(NoteColumns.PARENT_ID, desFolderId); // 设置新的父文件夹ID
    values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId); // 记录原始父文件夹ID
    values.put(NoteColumns.LOCAL_MODIFIED, 1); // 标记笔记已本地修改
    resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null); // 执行更新操作
}

/**
 * 批量将笔记移动到指定的文件夹中。
 * 
 * @param resolver 内容解析器，用于执行数据库操作。
 * @param ids 需要移动的笔记ID集合。
 * @param folderId 目标文件夹ID，表示要将笔记移动到的新文件夹。
 * @return 如果移动操作成功执行，则返回true；否则返回false。
 */
public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
        long folderId) {
    if (ids == null) {
        Log.d(TAG, "the ids is null");
        return true; // 如果ID集为空，视为操作成功
    }

    // 准备批量操作
    ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
    for (long id : ids) {
        ContentProviderOperation.Builder builder = ContentProviderOperation
                .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
        builder.withValue(NoteColumns.PARENT_ID, folderId); // 设置新的父文件夹ID
        builder.withValue(NoteColumns.LOCAL_MODIFIED, 1); // 标记笔记已本地修改
        operationList.add(builder.build());
    }

    try {
        ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
        // 检查操作结果
        if (results == null || results.length == 0 || results[0] == null) {
            Log.d(TAG, "delete notes failed, ids:" + ids.toString());
            return false; // 如果没有成功的结果，返回false
        }
        return true; // 批量操作成功
    } catch (RemoteException e) {
        Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
    } catch (OperationApplicationException e) {
        Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
    }
    return false; // 捕获异常，返回失败
}

    /**
     * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
     */
    public static int getUserFolderCount(ContentResolver resolver) {
        // 查询数据库中类型为文件夹且父ID不为回收站ID的笔记数量
        Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,
                new String[] { "COUNT(*)" },
                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
                new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
                null);

        int count = 0;
        if(cursor != null) {
            // 如果查询结果不为空，则尝试获取计数结果
            if(cursor.moveToFirst()) {
                try {
                    count = cursor.getInt(0); // 获取查询结果中的计数
                } catch (IndexOutOfBoundsException e) {
                    // 处理可能的索引越界异常
                    Log.e(TAG, "get folder count failed:" + e.toString());
                } finally {
                    // 无论是否成功，最后都关闭Cursor
                    cursor.close();
                }
            }
        }
        return count; // 返回文件夹数量
    }

    public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
        // 根据noteId和类型查询数据库，排除父ID为垃圾文件夹的情况
        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                null,
                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
                new String [] {String.valueOf(type)},
                null);

        boolean exist = false;
        if (cursor != null) {
            // 检查查询结果是否有记录
            if (cursor.getCount() > 0) {
                exist = true;
            }
            // 关闭Cursor
            cursor.close();
        }
        return exist;
    }
    public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
    // 使用ContentUris和noteId构建查询URI，并执行查询
    Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
            null, null, null, null);

    boolean exist = false;
    if (cursor != null) {
        // 如果查询结果不为空，检查是否有记录匹配
        if (cursor.getCount() > 0) {
            exist = true;
        }
        // 关闭Cursor
        cursor.close();
    }
    return exist;
}

   public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
    // 使用ContentUris和dataId构建查询URI，并执行查询
    Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
            null, null, null, null);

    boolean exist = false;
    if (cursor != null) {
        // 如果查询结果不为空，检查是否有记录匹配
        if (cursor.getCount() > 0) {
            exist = true;
        }
        // 关闭Cursor
        cursor.close();
    }
    return exist;
}

    public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
    // 构建查询条件，查询类型为文件夹且非回收站中的记录，并执行查询
    Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
            NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
            " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
            " AND " + NoteColumns.SNIPPET + "=?",
            new String[] { name }, null);
    
    boolean exist = false;
    if(cursor != null) {
        // 如果查询结果不为空，检查是否有记录匹配
        if(cursor.getCount() > 0) {
            exist = true;
        }
        // 关闭Cursor
        cursor.close();
    }
    return exist;
}
    public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
    // 根据指定的文件夹ID查询笔记小部件的ID和类型
    Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
            new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
            NoteColumns.PARENT_ID + "=?",
            new String[] { String.valueOf(folderId) },
            null);

    HashSet<AppWidgetAttribute> set = null;
    if (c != null) {
        // 如果查询结果不为空，则遍历结果并填充集合
        if (c.moveToFirst()) {
            set = new HashSet<AppWidgetAttribute>();
            do {
                try {
                    AppWidgetAttribute widget = new AppWidgetAttribute();
                    widget.widgetId = c.getInt(0); // 获取小部件ID
                    widget.widgetType = c.getInt(1); // 获取小部件类型
                    set.add(widget);
                } catch (IndexOutOfBoundsException e) {
                    Log.e(TAG, e.toString());
                }
            } while (c.moveToNext());
        }
        c.close(); // 关闭游标
    }
    return set;
}

   public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
    // 根据笔记ID和MIME类型查询关联的电话号码
    Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
            new String [] { CallNote.PHONE_NUMBER },
            CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
            new String [] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE },
            null);

    if (cursor != null && cursor.moveToFirst()) {
        try {
            return cursor.getString(0); // 获取电话号码
        } catch (IndexOutOfBoundsException e) {
            Log.e(TAG, "Get call number fails " + e.toString());
        } finally {
            cursor.close(); // 关闭游标
        }
    }
    return ""; // 如果未查询到电话号码，则返回空字符串
}
    public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
    // 构造查询语句，查询特定电话号码、通话日期和MIME类型的注释ID
    Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
            new String [] { CallNote.NOTE_ID },
            CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
            + CallNote.PHONE_NUMBER + ",?)",
            new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
            null);

    if (cursor != null) {
        if (cursor.moveToFirst()) {
            try {
                // 如果查询结果存在，返回第一行的注释ID
                return cursor.getLong(0);
            } catch (IndexOutOfBoundsException e) {
                // 处理索引越界异常
                Log.e(TAG, "Get call note id fails " + e.toString());
            }
        }
        // 关闭游标
        cursor.close();
    }
    // 如果查询无结果，返回0
    return 0;
}


    public static String getSnippetById(ContentResolver resolver, long noteId) {
    // 构造查询语句，查询特定ID的注释的摘要
    Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
            new String [] { NoteColumns.SNIPPET },
            NoteColumns.ID + "=?",
            new String [] { String.valueOf(noteId)},
            null);

    if (cursor != null) {
        String snippet = "";
        if (cursor.moveToFirst()) {
            // 如果查询结果存在，获取摘要
            snippet = cursor.getString(0);
        }
        // 关闭游标
        cursor.close();
        return snippet;
    }
    // 如果查询无结果，抛出异常
    throw new IllegalArgumentException("Note is not found with id: " + noteId);
}



   public static String getFormattedSnippet(String snippet) {
    if (snippet != null) {
        // 删除首尾空格
        snippet = snippet.trim();
        // 如果摘要中包含换行符，截取至第一个换行符前
        int index = snippet.indexOf('\n');
        if (index != -1) {
            snippet = snippet.substring(0, index);
        }
    }
    return snippet;
}