112 lines
3.3 KiB
JavaScript
112 lines
3.3 KiB
JavaScript
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/**
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* @readonly
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* @enum {string}
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*/
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const LOGICAL = {
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AND: "and",
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OR: "or",
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};
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/**
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* Recursively processes an array of raw condition objects and populates the given parent group with
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* corresponding ConditionExpression or ConditionExpressionGroup instances.
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* @param {Array} conditions Array of raw condition objects, where each object represents either a group or an expression.
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* @param {ConditionExpressionGroup} parentGroup The parent group to which the instantiated ConditionExpression or ConditionExpressionGroup objects will be added.
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* @returns {void}
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*/
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function processMonitorConditions(conditions, parentGroup) {
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conditions.forEach(condition => {
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const andOr = condition.andOr === LOGICAL.OR ? LOGICAL.OR : LOGICAL.AND;
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if (condition.type === "group") {
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const group = new ConditionExpressionGroup([], andOr);
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// Recursively process the group's children
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processMonitorConditions(condition.children, group);
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parentGroup.children.push(group);
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} else if (condition.type === "expression") {
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const expression = new ConditionExpression(condition.variable, condition.operator, condition.value, andOr);
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parentGroup.children.push(expression);
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}
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});
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}
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class ConditionExpressionGroup {
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/**
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* @type {ConditionExpressionGroup[]|ConditionExpression[]} Groups and/or expressions to test
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*/
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children = [];
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/**
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* @type {LOGICAL} Connects group result with previous group/expression results
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*/
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andOr;
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/**
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* @param {ConditionExpressionGroup[]|ConditionExpression[]} children Groups and/or expressions to test
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* @param {LOGICAL} andOr Connects group result with previous group/expression results
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*/
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constructor(children = [], andOr = LOGICAL.AND) {
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this.children = children;
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this.andOr = andOr;
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}
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/**
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* @param {Monitor} monitor Monitor instance
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* @returns {ConditionExpressionGroup|null} A ConditionExpressionGroup with the Monitor's conditions
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*/
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static fromMonitor(monitor) {
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const conditions = JSON.parse(monitor.conditions);
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if (conditions.length === 0) {
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return null;
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}
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const root = new ConditionExpressionGroup();
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processMonitorConditions(conditions, root);
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return root;
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}
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}
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class ConditionExpression {
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/**
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* @type {string} ID of variable
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*/
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variable;
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/**
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* @type {string} ID of operator
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*/
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operator;
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/**
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* @type {string} Value to test with the operator
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*/
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value;
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/**
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* @type {LOGICAL} Connects expression result with previous group/expression results
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*/
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andOr;
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/**
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* @param {string} variable ID of variable to test against
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* @param {string} operator ID of operator to test the variable with
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* @param {string} value Value to test with the operator
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* @param {LOGICAL} andOr Connects expression result with previous group/expression results
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*/
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constructor(variable, operator, value, andOr = LOGICAL.AND) {
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this.variable = variable;
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this.operator = operator;
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this.value = value;
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this.andOr = andOr;
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}
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}
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module.exports = {
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LOGICAL,
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ConditionExpressionGroup,
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ConditionExpression,
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};
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