Created
October 11, 2017 08:47
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//: Playground - noun: a place where people can play | |
import UIKit | |
let CHARACTER_LIMIT = 7 | |
let text = "a b c d e f g h i j k" | |
class TweetComponent: CustomStringConvertible { | |
var content: String | |
let index: Int | |
let maxPages: Int | |
var prefix: String { | |
return "\(index)/\(maxPages) " | |
} | |
var characterLimit: Int { | |
return CHARACTER_LIMIT - prefix.characters.count | |
} | |
init(content: String, index: Int, maxPages: Int) { | |
self.content = content | |
self.index = index | |
self.maxPages = maxPages | |
if content.characters.count > characterLimit { | |
print("ERROR \(content) too long, it needs to be \(characterLimit)") | |
} | |
} | |
func append(str: String) -> Bool { | |
let proposedSentence = "\(content) \(str)" | |
if proposedSentence.characters.count <= characterLimit { | |
content = proposedSentence | |
return true | |
} | |
return false | |
} | |
public var description: String { | |
return "\(prefix)\(content)" | |
} | |
} | |
func split(inputStr: String, maxPages: Int=1) -> [TweetComponent] { | |
var words = inputStr.components(separatedBy: .whitespacesAndNewlines) | |
// Initialize the first component manually. We'll fix up maxPages later. | |
var ret: [TweetComponent] = [TweetComponent.init(content: words.remove(at: 0), index: 1, maxPages: maxPages)] | |
for word in words { | |
let last = ret.last! | |
// A try catch here would be nicer, perhaps. | |
let success = last.append(str: word) | |
if !success { | |
ret.append(TweetComponent.init(content: word, index: ret.count + 1, maxPages: maxPages)) | |
} | |
} | |
if ret.count > maxPages { | |
return split(inputStr: inputStr, maxPages: ret.count) | |
} | |
return ret | |
} | |
func prettyPrint(strArr: [TweetComponent]) { | |
for tweet in strArr { | |
print("\(tweet) (length: \(tweet.description.characters.count))") | |
} | |
print("total is \(strArr.count)") | |
} | |
prettyPrint(strArr: split(inputStr: text)) |
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