| 1 | const statement = require("./statement.js"); |
| 2 | const event = require("./event.js"); |
| 3 | const fs = require("fs"); |
| 4 |
|
| 5 | const FileHandler = require("./fileHandler.js"); |
| 6 |
|
| 7 | class Queue { |
| 8 | constructor(name, location, config) { |
| 9 | if (typeof name != "string") throw new Error(`Expected string, got ${typeof name} for name`); |
| 10 | if (typeof location != "string") throw new Error(`Expected string, got ${typeof location} for location`); |
| 11 | this.name = name; |
| 12 | this.timestamp = new Date(); |
| 13 | this.location = location; |
| 14 | this.filename = this.location + "/" + this.timestamp.toISOString().replace(/\:/g, "-").replace(/\./g, "-") + ".log"; |
| 15 | this.queue = []; |
| 16 | this.fixed = false; |
| 17 |
|
| 18 | this.compact = false; |
| 19 | this.fileStarted = false; |
| 20 | |
| 21 | if (config) { |
| 22 | if (config.compact) { |
| 23 | if (typeof config.compact != "boolean") throw new Error(`Expected boolean, got ${typeof config.compact} for config.compact`); |
| 24 | this.compact = config.compact; |
| 25 | } |
| 26 | } |
| 27 |
|
| 28 | let configFile = this.location + "/metadata.json"; |
| 29 |
|
| 30 | FileHandler.AppendFile(this.filename, ""); // touch the file |
| 31 | FileHandler.AppendFile(configFile, ""); |
| 32 |
|
| 33 | let configContent = fs.readFileSync(configFile).toString(); |
| 34 |
|
| 35 | let queueConfig = []; |
| 36 | if (configContent != "") queueConfig = JSON.parse(configContent); |
| 37 |
|
| 38 | queueConfig.push( |
| 39 | { |
| 40 | "time": this.timestamp, |
| 41 | "log": this.filename |
| 42 | } |
| 43 | ); |
| 44 |
|
| 45 | fs.writeFileSync(configFile, JSON.stringify(queueConfig)); |
| 46 |
|
| 47 | return this; |
| 48 | } |
| 49 |
|
| 50 | push() { |
| 51 | if (this.fixed) throw new Error("Cannot write to the queue after the log is fixed"); |
| 52 | if (arguments.length >= 3) this.queue.push(new statement(arguments[0], arguments[1], arguments[2])); |
| 53 | else if (arguments.length > 0) { |
| 54 | if (arguments[0] instanceof event) this.queue.push(arguments[0].statements); // object is an Event |
| 55 | else if (arguments[0] instanceof statement) this.queue.push(arguments[0]); // object is a Statement |
| 56 | else throw new TypeError("Expected an Event or Statement"); |
| 57 | } else throw new Error("Expected at least one argument"); |
| 58 | return this; |
| 59 | } |
| 60 |
|
| 61 | write() { |
| 62 | if (this.fixed) throw new Error("Cannot write queue after the log is fixed"); |
| 63 | let recursiveCompactFunction; |
| 64 | if (this.compact) { |
| 65 | recursiveCompactFunction = function(object) { |
| 66 | if (Array.isArray(object)) { |
| 67 | for (let i = 0; i < object.length; i++) { |
| 68 | object[i] = recursiveCompactFunction(object[i]); |
| 69 | } |
| 70 | return object; |
| 71 | } else { |
| 72 | let fixed = {}; |
| 73 | fixed.tt = object.timestamp; |
| 74 | fixed.v = object.verbosity; |
| 75 | fixed.t = object.tag; |
| 76 | fixed.m = object.message; |
| 77 | return fixed; |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 |
|
| 82 | if (arguments.length > 0) { |
| 83 | let toWrite; |
| 84 | if (arguments.length >= 3) toWrite = new statement(arguments[0], arguments[1], arguments[2]); |
| 85 | else { |
| 86 | if (arguments[0] instanceof event) toWrite = arguments[0].statements; // object is an Event |
| 87 | else if (arguments[0] instanceof statement) toWrite = arguments[0]; // object is a Statement |
| 88 | else throw new TypeError("Expected an Event or Statement"); |
| 89 | } |
| 90 |
|
| 91 | if (this.compact) { |
| 92 | toWrite = recursiveCompactFunction(toWrite); |
| 93 | } |
| 94 |
|
| 95 | let appendString = ""; |
| 96 | if (this.fileStarted) appendString += "\n"; |
| 97 | appendString += JSON.stringify(toWrite); |
| 98 | if (!this.fileStarted) this.fileStarted = true; |
| 99 | FileHandler.AppendFile(this.filename, appendString); |
| 100 | } else { |
| 101 | let queueLength = this.queue.length; |
| 102 | if (queueLength > 0) { |
| 103 | let appendString = ""; |
| 104 | let queue = this; |
| 105 | let toWrite = this.queue; |
| 106 | if (this.compact) { |
| 107 | toWrite = recursiveCompactFunction(toWrite); |
| 108 | } |
| 109 | toWrite.forEach(function (item) { |
| 110 | if (queue.fileStarted) appendString += "\n"; |
| 111 | appendString += JSON.stringify(item); |
| 112 | if (!queue.fileStarted) queue.fileStarted = true; |
| 113 | }); |
| 114 | this.queue = this.queue.slice(queueLength); |
| 115 | FileHandler.AppendFile(this.filename, appendString); |
| 116 | } |
| 117 | } |
| 118 | return this; |
| 119 | } |
| 120 |
|
| 121 | fix() { |
| 122 | this.fixed = true; |
| 123 | let logContent = fs.readFileSync(this.filename).toString(); |
| 124 | logContent = "[" + logContent.replace(/\n/g, "\n,") + "]"; |
| 125 | fs.writeFileSync(this.filename, logContent); |
| 126 | } |
| 127 | } |
| 128 |
|
| 129 | module.exports = Queue; |
| 130 |
|
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