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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/**
* CalStorageMetaDataModel provides methods for manipulating the metadata stored
* on items.
*/
export class CalStorageMetaDataModel extends CalStorageModelBase {
/**
* Adds meta data for an item.
*
* @param {string} id
* @param {string} value
*/
addMetaData(id, value) {
try {
this.db.prepareStatement(this.statements.mInsertMetaData);
const params = this.statements.mInsertMetaData.params;
params.item_id = id;
params.value = value;
this.statements.mInsertMetaData.executeStep();
} catch (e) {
if (e.result == Cr.NS_ERROR_ILLEGAL_VALUE) {
this.db.logError("Unknown error!", e);
} else {
// The storage service throws an NS_ERROR_ILLEGAL_VALUE in
// case pval is something complex (i.e not a string or
// number). Swallow this error, leaving the value empty.
this.db.logError("Error setting metadata for id " + id + "!", e);
}
} finally {
this.statements.mInsertMetaData.reset();
}
}
/**
* Deletes meta data for an item using its id.
*/
deleteMetaDataById(id) {
this.db.executeSyncItemStatement(this.statements.mDeleteMetaData, "item_id", id);
}
/**
* Gets meta data for an item given its id.
*
* @param {string} id
*/
getMetaData(id) {
const query = this.statements.mSelectMetaData;
let value = null;
try {
this.db.prepareStatement(query);
query.params.item_id = id;
if (query.executeStep()) {
value = query.row.value;
}
} catch (e) {
this.db.logError("Error getting metadata for id " + id + "!", e);
} finally {
query.reset();
}
return value;
}
/**
* Returns the meta data for all items.
*
* @param {string} key - Specifies which column to return.
*/
getAllMetaData(key) {
const query = this.statements.mSelectAllMetaData;
const results = [];
try {
this.db.prepareStatement(query);
while (query.executeStep()) {
results.push(query.row[key]);
}
} catch (e) {
this.db.logError(`Error getting all metadata ${key == "item_id" ? "IDs" : "values"} ` + e);
} finally {
query.reset();
}
return results;
}
}