asterix-app/src/main/resources/sdk/static/js/asterix-sdk-stable.js

// Temporary AsterixExpression Placeholder
function AExpression () {
    this._properties = {};
    this._success = function() {};

    return this;
}


AExpression.prototype.bind = function(options) {
    var options = options || {};

    if (options.hasOwnProperty("success")) {
        this._success = options["success"];
    }

    if (options.hasOwnProperty("return")) {
        this._properties["return"] = " return " + options["return"].val();
    }
};


AExpression.prototype.run = function(successFn) {
    var success_fn = successFn;

    $.ajax({
        type : 'GET',
        url : "http://localhost:19002/query",
        data : {"query" : "use dataverse TinySocial;\n" + this.val()},
        dataType : "json",
        success : function(data) {     
            success_fn(data);
        },
        error: function(r) {
            //alert(JSON.stringify(r));
        }
    });

    return this;
};


AExpression.prototype.val = function() { 

    var value = "";

    // If there is a dataverse defined, provide it.
    if (this._properties.hasOwnProperty("dataverse")) {
        value += "use dataverse " + this._properties["dataverse"] + ";\n";
    };

    if (this._properties.hasOwnProperty("value")) {
        value += this._properties["value"];
    }

    return value;
};

// @param expressionValue [String]
AExpression.prototype.set = function(expressionValue) {
    this._properties["value"] = expressionValue; 
    return this;
};


// FunctionExpression
// Parent: AsterixExpression
// 
// @param   options [Various], 
// @key     function [String], a function to be applid to the expression
// @key     expression [AsterixExpression or AQLClause] an AsterixExpression/Clause to which the fn will be applied
function FunctionExpression() {
    
    // Initialize superclass
    AExpression.call(this);
    
    this._properties["function"] = "";
    this._properties["expression"] = new AExpression().set("");

    // Check for fn/expression input
    if (arguments.length == 2 && typeof arguments[0] == "string" && 
        (arguments[1] instanceof AExpression || arguments[1] instanceof AQLClause)) {
     
        this._properties["function"] = arguments[0];
        this._properties["expression"] = arguments[1];
        
    } 

    // Return object
    return this;
}


FunctionExpression.prototype = Object.create(AExpression.prototype);
FunctionExpression.prototype.constructor = FunctionExpression;


FunctionExpression.prototype.fn = function(fnName) {

    if (typeof fnName == "string") {
        this._properties["function"] = fnName;
    }
    
    return this;
};


FunctionExpression.prototype.expression = function(expression) {
    if (expression instanceof AExpression || expression instanceof AQLClause) {
        this._properties["expression"] = expression;
    }
    
    return this;
};
   

FunctionExpression.prototype.val = function () { 
    return this._properties["function"] + "(" + this._properties["expression"].val() + ")";
};


// FLWOGR         ::= ( ForClause | LetClause ) ( Clause )* "return" Expression
// Clause         ::= ForClause | LetClause | WhereClause | OrderbyClause | GroupClause | LimitClause | DistinctClause
// 
// WhereClause    ::= "where" Expression
// OrderbyClause  ::= "order" "by" Expression ( ( "asc" ) | ( "desc" ) )? ( "," Expression ( ( "asc" ) | ( "desc" ) )? )*
//
// GroupClause    ::= "group" "by" ( Variable ":=" )? Expression ( "," ( Variable ":=" )? Expression )* ( "decor" Variable ":=" Expression ( "," "decor" Variable ":=" Expression )* )? "with" VariableRef ( "," VariableRef )*
// LimitClause    ::= "limit" Expression ( "offset" Expression )?
// DistinctClause ::= "distinct" "by" Expression ( "," Expression )*


// FLWOGRExpression
//
// FLWOGRExpression ::= ( ForClause | LetClause ) ( Clause )* "return" Expression
function FLWOGRExpression (options) {
    // Initialize superclass
    AExpression.call(this);

    this._properties["clauses"] = [];
    this._properties["minSize"] = 0;

    // Bind options and return
    this.bind(options);
    return this;
}


FLWOGRExpression.prototype = Object.create(AExpression.prototype);
FLWOGRExpression.prototype.constructor = FLWOGRExpression;


FLWOGRExpression.prototype.bind = function(options) {
    AExpression.prototype.bind.call(this, options);

    var options = options || {};

    if (options instanceof SetStatement) {
         this._properties["clauses"].push(options);
         this._properties["minSize"] += 1;
    }

    if (this._properties["clauses"].length <= this._properties["minSize"]) {
        // Needs to start with for or let clause
        if (options instanceof ForClause || options instanceof LetClause) {
            this._properties["clauses"].push(options);
        }
    } else {
        if (options instanceof AQLClause) {
            this._properties["clauses"].push(options);
        }
    }

    return this;
};


FLWOGRExpression.prototype.val = function() {
    var value = AExpression.prototype.val.call(this);

    var clauseValues = [];
    for (var c in this._properties["clauses"]) {
        clauseValues.push(this._properties["clauses"][c].val());
    }

    return value + clauseValues.join("\n");// + ";";
};


FLWOGRExpression.prototype.ReturnClause = function(expression) {
    return this.bind(new ReturnClause(expression));
};

// AQLClause
//
// Base Clause  ::= ForClause | LetClause | WhereClause | OrderbyClause | GroupClause | LimitClause | DistinctClause
function AQLClause() {
    this._properties = {};
    this._properties["clause"] = "";
}

AQLClause.prototype.val = function() {
    var value = this._properties["clause"];
 
    return value;
};

AQLClause.prototype.bind = function(options) {

    if (options instanceof AQLClause) {
        this._properties["clause"] += " " + options.val();
    }

    return this;
};

AQLClause.prototype.set = function(value) {
    this._properties["clause"] = value;
    return this;
};


// ForClause
//
// Grammar:
// "for" Variable ( "at" Variable )? "in" ( Expression )
//
// @param for_variable [String], REQUIRED, first variable in clause 
// @param at_variable [String], NOT REQUIRED, first variable in clause
// @param expression [AsterixExpression], REQUIRED, expression to evaluate
//
// TODO Error Checking
function ForClause(for_variable, at_variable, expression) {
    AQLClause.call(this);
  
    // at_variable is optional, check if defined
    var at = typeof at_variable ? at_variable : null;

    // Prepare clause
    this._properties["clause"] = "for $" + for_variable;
    if (at != null) {
        this._properties["clause"] += " at $" + at_variable;
    }
    this._properties["clause"] += " in " + expression.val();
    return this;
}

ForClause.prototype = Object.create(AQLClause.prototype);
ForClause.prototype.constructor = ForClause;


// LetClause
//
// Grammar:
// LetClause      ::= "let" Variable ":=" Expression
//
// @param let_variable [String]
// @param expression [AExpression]
//
// TODO Vigorous error checking
function LetClause(let_variable, expression) {
    AQLClause.call(this);
    
    this._properties["clause"] = "let $" + let_variable + " := ";
    this._properties["clause"] += expression.val();
    
    return this; 
}

LetClause.prototype = Object.create(AQLClause.prototype);
LetClause.prototype.constructor = LetClause;


// ReturnClause
//
// Grammar:
// return [AQLExpression]
function ReturnClause(expression) {
    AQLClause.call(this);

    this._properties["clause"] = "return ";
    
    if (expression instanceof AExpression || expression instanceof AQLClause) {
        this._properties["clause"] += expression.val();
    
    } else if ( typeof expression == "object" && Object.getPrototypeOf( expression ) === Object.prototype ) {
        
        // TODO Null object check
        
        this._properties["clause"] += "{";
        var returnStatements = [];
        for (returnValue in expression) {
           
            if (expression[returnValue] instanceof AExpression) { 
                returnStatements.push('"' + returnValue + '" ' + " : " + expression[returnValue].val());            
            } else if (typeof expression[returnValue] == "string") {          
                returnStatements.push('"' + returnValue + '" ' + " : " + expression[returnValue]);   
            }
        }
        this._properties["clause"] += returnStatements.join(",\n");
        this._properties["clause"] += "\n}";  
    
    } else {
        this._properties["clause"] += new AQLClause().set(expression).val();
    }

    return this;
}


ReturnClause.prototype = Object.create(AQLClause.prototype);
ReturnClause.prototype.constructor = ReturnClause;


// WhereClause
//
// Grammar: 
// ::= "where" Expression
// 
// @param expression [BooleanExpression], pushes this expression onto the stack
function WhereClause(expression) {
    AQLClause.call(this);

    this._properties["stack"] = [];

    this.bind(expression);

    return this;
}


WhereClause.prototype = Object.create(AQLClause.prototype);
WhereClause.prototype.constructor = WhereClause;


WhereClause.prototype.bind = function(expression) {
    if (expression instanceof AExpression) {
        this._properties["stack"].push(expression);
    }
};


WhereClause.prototype.val = function() {
    var value = "where ";   

    var count = this._properties["stack"].length - 1;
    while (count >= 0) {
        value += this._properties["stack"][count].val() + " ";
        count -= 1;
    }
    
    return value;
};


WhereClause.prototype.and = function() {
    
    var andClauses = [];  
    for (var expression in arguments) {
        
        if (arguments[expression] instanceof AExpression) {
            andClauses.push(arguments[expression].val());
        }
    }
    
    if (andClauses.length > 0) {
        this._properties["stack"].push(new AExpression().set(andClauses.join(" and ")));
    }
    
    return this;
};


WhereClause.prototype.or = function() {
    var orClauses = [];  
    for (var expression in arguments) {
        
        if (arguments[expression] instanceof AExpression) {
            orClauses.push(arguments[expression].val());
        }
    }
    
    if (andClauses.length > 0) {
        this._properties["stack"].push(new AExpression().set(orClauses.join(" and ")));
    }
    
    return this;
};

// LimitClause
// Grammar:
// LimitClause    ::= "limit" Expression ( "offset" Expression )?
// 
// @param   limitExpression [REQUIRED, AQLExpression]
// @param   offsetExpression [OPTIONAL, AQLExpression]
function LimitClause(limitExpression, offsetExpression) {

    AQLClause.call(this);
  
    // limitExpression required
    this._properties["clause"] = "limit " + limitExpression.val();

    // Optional: Offset
    var offset = typeof offsetExpression ? offsetExpression : null;
    if (offset != null) {
        this._properties["clause"] += " offset " + offsetExpression.val();
    }

    return this;
}

LimitClause.prototype = Object.create(AQLClause.prototype);
LimitClause.prototype.constructor = LimitClause;


// OrderbyClause
//
// Grammar:
// OrderbyClause  ::= "order" "by" Expression ( ( "asc" ) | ( "desc" ) )? ( "," Expression ( ( "asc" ) | ( "desc" ) )? )*
//
// @params AQLExpressions and asc/desc strings, in any quantity. At least one required. 
function OrderbyClause() {
    
    AQLClause.call(this);

    // At least one argument expression is required, and first should be expression
    if (arguments.length == 0 || !(arguments[0] instanceof AExpression)) {
    
        // TODO Not sure which error to throw for an empty OrderBy but this should fail.
        alert("Order By Error");
        this._properties["clause"] = null;
        return this;    
    } 

    var expc = 0;
    var expressions = [];    

    while (expc < arguments.length) {
      
        var expression = "";

        if (arguments[expc] instanceof AExpression) {
            expression += arguments[expc].val();
        }

        var next = expc + 1;
        if (next < arguments.length && (arguments[next] == "asc" || arguments[next] == "desc")) {
            expc++;
            expression += " " + arguments[expc];
        }
        
        expressions.push(expression);
      
        expc++;
    }

    this._properties["clause"] = "order by " + expressions.join(", ");
    return this;
}

OrderbyClause.prototype = Object.create(AQLClause.prototype);
OrderbyClause.prototype.constructor = OrderbyClause;


// GroupClause
//
// Grammar:
// GroupClause    ::= "group" "by" ( Variable ":=" )? Expression ( "," ( Variable ":=" )? Expression )* ( "decor" Variable ":=" Expression ( "," "decor" Variable ":=" Expression )* )? "with" VariableRef ( "," VariableRef )*
function GroupClause() {
    AQLClause.call(this);

    if (arguments.length == 0) {
        // TODO Not sure which error to throw for an empty GroupBy but this should fail.
        alert("Group Error");
        this._properties["clause"] = null;
        return this;    
    } 

    var expc = 0;
    var expressions = [];
    var variableRefs = [];
    var isDecor = false;
    
    while (expc < arguments.length) {

        if (arguments[expc] instanceof AExpression) {

            isDecor = false;
            expressions.push(arguments[expc].val());

        } else if (typeof arguments[expc] == "string") {       
            
            // Special keywords, decor & with
            if (arguments[expc] == "decor") {
                isDecor = true;
            } else if (arguments[expc] == "with") {
                isDecor = false;
                expc++;
                while (expc < arguments.length) {
                    variableRefs.push("$" + arguments[expc]);
                    expc++;
                }
            
            // Variables and variable refs
            } else {
                
                var nextc = expc + 1;
                var expression = "";
            
                if (isDecor) {
                    expression += "decor "; 
                    isDecor = false;
                }

                expression += "$" + arguments[expc] + " := " + arguments[nextc].val();
                expressions.push(expression);
                expc++;
            }
        }

        expc++;
    }

    this._properties["clause"] = "group by " + expressions.join(", ") + " with " + variableRefs.join(", ");
    return this;
}

GroupClause.prototype = Object.create(AQLClause.prototype);
GroupClause.prototype.constructor = GroupClause;


// SetStatement
//
// Grammar
// "set" Identifier StringLiteral
function SetStatement (identifier, stringLiteral) {
    AExpression.call(this);

    var statement = "set " + identifier + ' "' + stringLiteral + '";';

    AExpression.prototype.set.call(this, statement);

    return this;
}

SetStatement.prototype = Object.create(AExpression.prototype);
SetStatement.prototype.constructor = SetStatement;


// Quantified Expression
// 
// Grammar
// QuantifiedExpression ::= ( ( "some" ) | ( "every" ) ) Variable "in" Expression ( "," Variable "in" Expression )* "satisfies" Expression
// 
// @param String some/every
// @param [AExpression]
// @param [Aexpression] satisfiesExpression
function QuantifiedExpression (keyword, expressions, satisfiesExpression) {
    AExpression.call(this);

    var expression = keyword + " ";
    var varsInExpressions = [];

    for (var varInExpression in expressions) {
        varsInExpressions.push(varInExpression + " in " + expressions[varInExpression].val()); 
    } 
    expression += varsInExpressions.join(", ") + " satisfies " + satisfiesExpression.val();
    
    AExpression.prototype.set.call(this, expression);

    return this;
}

QuantifiedExpression.prototype = Object.create(AExpression.prototype);
QuantifiedExpression.prototype.constructor = QuantifiedExpression;

QuantifiedExpression.prototype.val = function() {
    var value = AExpression.prototype.val.call(this);
    return "(" + value + ")";    
};