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exposed parseRules for future feature work #176

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2 changes: 1 addition & 1 deletion lib/parser/nools/nool.parser.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
"use strict";

var tokens = require("./tokens.js"),
var tokens = require("./tokens.js").topLevelTokens,
extd = require("../../extended"),
keys = extd.hash.keys,
utils = require("./util.js");
Expand Down
145 changes: 79 additions & 66 deletions lib/parser/nools/tokens.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ var utils = require("./util.js"),
extd = require("../../extended"),
filter = extd.filter,
indexOf = extd.indexOf,
predicates = ["not", "or", "exists"],
predicates = ["not", "or", "exists"],
predicateRegExp = new RegExp("^(" + predicates.join("|") + ") *\\((.*)\\)$", "m"),
predicateBeginExp = new RegExp(" *(" + predicates.join("|") + ") *\\(", "g");

Expand Down Expand Up @@ -38,8 +38,82 @@ var splitRuleLineByPredicateExpressions = function (ruleLine) {
return ret.join(";");
};

var ruleTokens = {
/**
*/
var ruleRegExp = /^(\$?\w+)\s*:\s*(\w+)(.*)/;
var collectRuleRegExp = /^(\$?\w+)\s*:\s*(\w+)\s*(.*)from\s*collect\s*\((.*)\)/;
var hashRegExp = /(\{ *(?:["']?\$?\w+["']?\s*:\s*["']?\$?\w+["']? *(?:, *["']?\$?\w+["']?\s*:\s*["']?\$?\w+["']?)*)+ *\})/;
var fromRegExp = /(\bfrom\s+.*)/;
var parseRules = function (str) {
var rules = [];
var ruleLines = str.split(";"), l = ruleLines.length, ruleLine, alias, constraints, parts, collectRule;
for (var i = 0; i < l && (ruleLine = ruleLines[i].replace(/^\s*|\s*$/g, "").replace(/\n/g, "")); i++) {
if (!isWhiteSpace(ruleLine)) {
var rule = [];
if (predicateRegExp.test(ruleLine)) {
var m = ruleLine.match(predicateRegExp);
var pred = m[1].replace(/^\s*|\s*$/g, "");
rule.push(pred);
ruleLine = m[2].replace(/^\s*|\s*$/g, "");
if (pred === "or") {
rule = rule.concat(parseRules(splitRuleLineByPredicateExpressions(ruleLine)));
rules.push(rule);
continue;
}
}
else if( collectRuleRegExp.test(ruleLine) ) {
parts = ruleLine.match(collectRuleRegExp);
if(parts && parts.length ) {
rule.push('collect');
rule.push(parts[2], parts[1]);
constraints = parts[3].trim();
rule.push( (constraints && !isWhiteSpace(constraints)) ? constraints : undefined );
collectRule = parseRules(parts[4]);
rule.push(collectRule[0]);
}
rules.push(rule);
continue;
}
parts = ruleLine.match(ruleRegExp);
if (parts && parts.length) {
rule.push(parts[2], parts[1]);
constraints = parts[3].replace(/^\s*|\s*$/g, "");
var hashParts = constraints.match(hashRegExp), from = null, fromMatch;
if (hashParts) {
var hash = hashParts[1], constraint = constraints.replace(hash, "");
if (fromRegExp.test(constraint)) {
fromMatch = constraint.match(fromRegExp);
from = fromMatch[0];
constraint = constraint.replace(fromMatch[0], "");
}
if (constraint) {
rule.push(constraint.replace(/^\s*|\s*$/g, ""));
}
if (hash) {
rule.push(eval("(" + hash.replace(/(\$?\w+)\s*:\s*(\$?\w+)/g, '"$1" : "$2"') + ")"));
}
} else if (constraints && !isWhiteSpace(constraints)) {
if (fromRegExp.test(constraints)) {
fromMatch = constraints.match(fromRegExp);
from = fromMatch[0];
constraints = constraints.replace(fromMatch[0], "");
}
rule.push(constraints);
}
if (from) {
rule.push(from);
}
rules.push(rule);
} else {
throw new Error("Invalid constraint " + ruleLine);
}
}
}
return rules;
};
exports.parseRules = parseRules;

var ruleTokens = {
salience: (function () {
var salienceRegexp = /^(salience|priority)\s*:\s*(-?\d+)\s*[,;]?/;
return function (src, context) {
Expand Down Expand Up @@ -93,7 +167,7 @@ var ruleTokens = {
}
};
})(),

"agenda-group": function () {
return this.agendaGroup.apply(this, arguments);
},
Expand All @@ -109,66 +183,6 @@ var ruleTokens = {
when: (function () {
/*jshint evil:true*/

var ruleRegExp = /^(\$?\w+) *: *(\w+)(.*)/;

var constraintRegExp = /(\{ *(?:["']?\$?\w+["']?\s*:\s*["']?\$?\w+["']? *(?:, *["']?\$?\w+["']?\s*:\s*["']?\$?\w+["']?)*)+ *\})/;
var fromRegExp = /(\bfrom\s+.*)/;
var parseRules = function (str) {
var rules = [];
var ruleLines = str.split(";"), l = ruleLines.length, ruleLine;
for (var i = 0; i < l && (ruleLine = ruleLines[i].replace(/^\s*|\s*$/g, "").replace(/\n/g, "")); i++) {
if (!isWhiteSpace(ruleLine)) {
var rule = [];
if (predicateRegExp.test(ruleLine)) {
var m = ruleLine.match(predicateRegExp);
var pred = m[1].replace(/^\s*|\s*$/g, "");
rule.push(pred);
ruleLine = m[2].replace(/^\s*|\s*$/g, "");
if (pred === "or") {
rule = rule.concat(parseRules(splitRuleLineByPredicateExpressions(ruleLine)));
rules.push(rule);
continue;
}

}
var parts = ruleLine.match(ruleRegExp);
if (parts && parts.length) {
rule.push(parts[2], parts[1]);
var constraints = parts[3].replace(/^\s*|\s*$/g, "");
var hashParts = constraints.match(constraintRegExp), from = null, fromMatch;
if (hashParts) {
var hash = hashParts[1], constraint = constraints.replace(hash, "");
if (fromRegExp.test(constraint)) {
fromMatch = constraint.match(fromRegExp);
from = fromMatch[0];
constraint = constraint.replace(fromMatch[0], "");
}
if (constraint) {
rule.push(constraint.replace(/^\s*|\s*$/g, ""));
}
if (hash) {
rule.push(eval("(" + hash.replace(/(\$?\w+)\s*:\s*(\$?\w+)/g, '"$1" : "$2"') + ")"));
}
} else if (constraints && !isWhiteSpace(constraints)) {
if (fromRegExp.test(constraints)) {
fromMatch = constraints.match(fromRegExp);
from = fromMatch[0];
constraints = constraints.replace(fromMatch[0], "");
}
rule.push(constraints);
}
if (from) {
rule.push(from);
}
rules.push(rule);
} else {
throw new Error("Invalid constraint " + ruleLine);
}
}
}
return rules;
};

return function (orig, context) {
var src = orig.replace(/^when\s*/, "").replace(/^\s*|\s*$/g, "");
if (utils.findNextToken(src) === "{") {
Expand Down Expand Up @@ -324,7 +338,7 @@ var topLevelTokens = {
}
},

"rule": function (orig, context, parse) {
"rule": function (orig, context, parse) {
var src = orig.replace(/^rule\s*/, "");
var name = src.match(/^([a-zA-Z_$][0-9a-zA-Z_$]*|"[^"]*"|'[^']*')/);
if (name) {
Expand All @@ -343,8 +357,7 @@ var topLevelTokens = {
} else {
throw new Error("missing name");
}

}
};
module.exports = topLevelTokens;
exports.topLevelTokens = topLevelTokens;