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s3db-connectivity.js
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s3db-connectivity.js
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/**
* S3DB Connectivity is a browser module for interacting with S3DB, the Simple and Sloppy Semantic Database.
* Namespace: s3dbc
* Depends on: jQuery
* Based on James Burke's Universal Module Definition (UMD) variation: https://gist.github.com/1262861
*/
(function (root, factory) {
if (typeof define === "function" && define.amd) {
// Use AMD.
define(["jquery"], factory);
} else {
// Use browser globals.
root.s3dbc = factory(root.jQuery);
}
}(this, function ($) {
var _deployment, _key, _debug, _queryCounter, _checkDeployment, _s3qlQuery, _sparqlQuery, _login;
_debug = false;
_queryCounter = 0;
_checkDeployment = function (callback) {
if (_deployment === undefined) {
callback(new Error("Please provide the URL of the S3DB deployment via setDeployment."));
} else {
callback(null);
}
};
_s3qlQuery = function (query, callback) {
_checkDeployment(function (err) {
if (err !== null) {
setTimeout(function () {
callback(err);
}, 0);
} else {
var queryNumber, queryParams;
if (_debug === true) {
_queryCounter++;
queryNumber = _queryCounter;
console.info("S3QL Query", queryNumber, ":", query);
}
queryParams = {
query: query,
format: "json"
};
if (_key !== undefined) {
queryParams.key = _key;
}
$.ajax({
url: _deployment + "S3QL.php",
data: queryParams,
dataType: "jsonp",
success: function (result) {
if (_debug === true) {
console.info("S3QL Query", queryNumber, "Result:", result);
}
// Error handling.
if (result.length === 0) {
// Empty result, call callback anyway.
callback(null, result);
} else {
if (result[0].error_code === undefined || result[0].error_code == "0") {
// No errors found, call callback.
callback(null, result);
} else {
callback(new Error(result[0].message));
}
}
}
});
}
});
};
_sparqlQuery = function (query, fromCache, callback) {
_checkDeployment(function (err) {
if (err !== null) {
setTimeout(function () {
callback(err);
}, 0);
} else {
var queryNumber, queryParams;
if (_debug === true) {
_queryCounter++;
queryNumber = _queryCounter;
console.info("SPARQL Query", queryNumber, ":", query);
}
queryParams = {
query: query,
clean: fromCache,
format: "json"
};
if (_key !== undefined) {
queryParams.key = _key;
}
$.ajax({
url: _deployment + "sparql.php",
data: queryParams,
dataType: "jsonp",
success: function (result) {
if (_debug === true) {
console.info("SPARQL Query", queryNumber, "Result:", result);
}
// Error handling.
if (result.length === 0) {
// Empty result, call callback anyway.
callback(null, result);
} else {
if (result[0].error_code === undefined || result[0].error_code == "0") {
// No errors found, call callback.
callback(null, result);
} else {
callback(new Error(result[0].message));
}
}
}
});
}
});
};
_login = function (username, password, callback) {
_checkDeployment(function (err) {
if (err !== null) {
setTimeout(function () {
callback(err);
}, 0);
} else {
$.ajax({
url: _deployment + "apilogin.php",
data: {
username: username,
password: password,
format: "json"
},
dataType: "jsonp",
success: function (result) {
if (_debug === true) {
console.info("Login Result: ", result);
}
// Error handling.
if (result[0].error_code === undefined || result[0].error_code == "0") {
_key = result[0].key_id;
callback(null, _key);
} else {
callback(new Error(result[0].message));
}
}
});
}
});
};
return {
selectItem: function (itemId, callback) {
_s3qlQuery("<S3QL>"
+ "<select>*</select>"
+ "<from>items</from>"
+ "<where>"
+ "<item_id>" + itemId + "</item_id>"
+ "</where>"
+ "</S3QL>",
callback
);
},
selectItemsByCollection: function (collectionId, callback) {
_s3qlQuery("<S3QL>"
+ "<select>*</select>"
+ "<from>items</from>"
+ "<where>"
+ "<collection_id>" + collectionId + "</collection_id>"
+ "</where>"
+ "</S3QL>",
callback
);
},
insertItem: function (collectionId, notes, callback) {
_s3qlQuery("<S3QL>"
+ "<insert>item</insert>"
+ "<where>"
+ "<collection_id>" + collectionId + "</collection_id>"
+ "<notes>" + notes + "</notes>"
+ "</where>"
+ "</S3QL>",
callback
);
},
updateItem: function (itemId, notes, callback) {
_s3qlQuery("<S3QL>"
+ "<update>item</update>"
+ "<where>"
+ "<item_id>" + itemId + "</item_id>"
+ "<notes>" + notes + "</notes>"
+ "</where>"
+ "</S3QL>",
callback
);
},
deleteItem: function (itemId, callback) {
_s3qlQuery("<S3QL>"
+ "<delete>item</delete>"
+ "<where>"
+ "<item_id>" + itemId + "</item_id>"
+ "</where>"
+ "<flag>all</flag>"
+ "</S3QL>",
callback
);
},
selectStatementsByItem: function (itemId, callback) {
_s3qlQuery("<S3QL>"
+ "<select>*</select>"
+ "<from>statements</from>"
+ "<where>"
+ "<item_id>" + itemId + "</item_id>"
+ "</where>"
+ "</S3QL>",
callback
);
},
selectStatementsByRuleAndItem: function (ruleId, itemId, callback) {
_s3qlQuery("<S3QL>"
+ "<select>*</select>"
+ "<from>statements</from>"
+ "<where>"
+ "<rule_id>" + ruleId + "</rule_id>"
+ "<item_id>" + itemId + "</item_id>"
+ "</where>"
+ "</S3QL>",
callback
);
},
selectStatementsByRuleAndValue: function (ruleId, value, callback) {
_s3qlQuery("<S3QL>"
+ "<select>*</select>"
+ "<from>statements</from>"
+ "<where>"
+ "<rule_id>" + ruleId + "</rule_id>"
+ "<value>" + value + "</value>"
+ "</where>"
+ "</S3QL>",
callback
);
},
selectStatementsByRuleAndItemAndValue: function (ruleId, itemId, value, callback) {
_s3qlQuery("<S3QL>"
+ "<select>*</select>"
+ "<from>statements</from>"
+ "<where>"
+ "<item_id>" + itemId + "</item_id>"
+ "<rule_id>" + ruleId + "</rule_id>"
+ "<value>" + value + "</value>"
+ "</where>"
+ "</S3QL>",
callback
);
},
insertStatement: function (itemId, ruleId, value, callback) {
_s3qlQuery("<S3QL>"
+ "<insert>statement</insert>"
+ "<where>"
+ "<item_id>" + itemId + "</item_id>"
+ "<rule_id>" + ruleId + "</rule_id>"
+ "<value>" + value + "</value>"
+ "</where>"
+ "</S3QL>",
callback
);
},
updateStatement: function (statementId, value, callback) {
_s3qlQuery("<S3QL>"
+ "<update>statement</update>"
+ "<where>"
+ "<statement_id>" + statementId + "</statement_id>"
+ "<value>" + value + "</value>"
+ "</where>"
+ "</S3QL>",
callback
);
},
deleteStatement: function (statementId, callback) {
_s3qlQuery("<S3QL>"
+ "<delete>statement</delete>"
+ "<where>"
+ "<statement_id>" + statementId + "</statement_id>"
+ "</where>"
+ "</S3QL>",
callback
);
},
s3qlQuery: function (query, callback) {
_s3qlQuery(query, callback);
},
sparqlQuery: function (query, callback) {
_sparqlQuery(query, 1, callback);
},
cachedSparqlQuery: function (query, callback) {
_sparqlQuery(query, 0, callback);
},
login: function (username, password, callback) {
_login(username, password, callback);
},
logout: function () {
_key = undefined;
},
setDeployment: function (deployment) {
if (deployment[deployment.length - 1] !== "/") {
deployment = deployment + "/";
}
_deployment = deployment;
},
setKey: function (key) {
_key = key;
},
setDebug: function (debug) {
_debug = debug;
}
};
}));