mirror of https://github.com/oxen-io/session-ios
Remove SwiftCSV
Niels Andriesse
3 years ago
parent
3183b0ef9a
commit
16bb12e62c
@ -1,133 +0,0 @@
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//
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// CSV.swift
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// SwiftCSV
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//
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// Created by Naoto Kaneko on 2/18/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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import Foundation
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public protocol View {
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associatedtype Rows
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associatedtype Columns
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var rows: Rows { get }
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var columns: Columns { get }
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init(header: [String], text: String, delimiter: Character, limitTo: Int?, loadColumns: Bool) throws
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}
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open class CSV {
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static public let comma: Character = ","
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public let header: [String]
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lazy var _namedView: NamedView = {
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return try! NamedView(
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header: self.header,
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text: self.text,
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delimiter: self.delimiter,
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loadColumns: self.loadColumns)
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}()
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lazy var _enumeratedView: EnumeratedView = {
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return try! EnumeratedView(
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header: self.header,
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text: self.text,
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delimiter: self.delimiter,
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loadColumns: self.loadColumns)
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}()
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var text: String
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var delimiter: Character
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let loadColumns: Bool
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/// List of dictionaries that contains the CSV data
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public var namedRows: [[String : String]] {
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return _namedView.rows
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}
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/// Dictionary of header name to list of values in that column
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/// Will not be loaded if loadColumns in init is false
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public var namedColumns: [String : [String]] {
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return _namedView.columns
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}
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/// Collection of column fields that contain the CSV data
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public var enumeratedRows: [[String]] {
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return _enumeratedView.rows
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}
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/// Collection of columns with metadata.
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/// Will not be loaded if loadColumns in init is false
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public var enumeratedColumns: [EnumeratedView.Column] {
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return _enumeratedView.columns
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}
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@available(*, unavailable, renamed: "namedRows")
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public var rows: [[String : String]] {
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return namedRows
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}
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@available(*, unavailable, renamed: "namedColumns")
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public var columns: [String : [String]] {
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return namedColumns
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}
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/// Load CSV data from a string.
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///
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/// - parameter string: CSV contents to parse.
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/// - parameter delimiter: Character used to separate row and header fields (default is ',')
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/// - parameter loadColumns: Whether to populate the `columns` dictionary (default is `true`)
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/// - throws: `CSVParseError` when parsing `string` fails.
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public init(string: String, delimiter: Character = comma, loadColumns: Bool = true) throws {
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self.text = string
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self.delimiter = delimiter
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self.loadColumns = loadColumns
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self.header = try Parser.array(text: string, delimiter: delimiter, limitTo: 1).first ?? []
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}
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@available(*, deprecated, message: "Use init(url:delimiter:encoding:loadColumns:) instead of this path-based approach. Also, calling the parameter `name` instead of `path` was a mistake.")
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public convenience init(name: String, delimiter: Character = comma, encoding: String.Encoding = .utf8, loadColumns: Bool = true) throws {
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try self.init(url: URL(fileURLWithPath: name), delimiter: delimiter, encoding: encoding, loadColumns: loadColumns)
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}
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/// Load a CSV file as a named resource from `bundle`.
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///
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/// - parameter name: Name of the file resource inside `bundle`.
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/// - parameter ext: File extension of the resource; use `nil` to load the first file matching the name (default is `nil`)
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/// - parameter bundle: `Bundle` to use for resource lookup (default is `.main`)
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/// - parameter delimiter: Character used to separate row and header fields (default is ',')
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/// - parameter encoding: encoding used to read file (default is `.utf8`)
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/// - parameter loadColumns: Whether to populate the columns dictionary (default is `true`)
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/// - throws: `CSVParseError` when parsing the contents of the resource fails, or file loading errors.
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/// - returns: `nil` if the resource could not be found
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public convenience init?(name: String, extension ext: String? = nil, bundle: Bundle = .main, delimiter: Character = comma, encoding: String.Encoding = .utf8, loadColumns: Bool = true) throws {
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guard let url = bundle.url(forResource: name, withExtension: ext) else {
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return nil
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}
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try self.init(url: url, delimiter: delimiter, encoding: encoding, loadColumns: loadColumns)
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}
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/// Load a CSV file from `url`.
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///
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/// - parameter url: URL of the file (will be passed to `String(contentsOfURL:encoding:)` to load)
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/// - parameter delimiter: Character used to separate row and header fields (default is ',')
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/// - parameter encoding: Character encoding to read file (default is `.utf8`)
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/// - parameter loadColumns: Whether to populate the columns dictionary (default is `true`)
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/// - throws: `CSVParseError` when parsing the contents of `url` fails, or file loading errors.
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public convenience init(url: URL, delimiter: Character = comma, encoding: String.Encoding = .utf8, loadColumns: Bool = true) throws {
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let contents = try String(contentsOf: url, encoding: encoding)
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try self.init(string: contents, delimiter: delimiter, loadColumns: loadColumns)
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}
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/// Turn the CSV data into NSData using a given encoding
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open func dataUsingEncoding(_ encoding: String.Encoding) -> Data? {
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return description.data(using: encoding)
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}
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}
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@ -1,30 +0,0 @@
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//
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// Description.swift
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// SwiftCSV
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//
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// Created by Will Richardson on 11/04/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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import Foundation
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extension CSV: CustomStringConvertible {
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public var description: String {
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let head = header.joined(separator: ",") + "\n"
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let cont = namedRows.map { row in
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return header.map { key -> String in
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let value = row[key]!
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// Add quotes if value contains a comma
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if value.contains(",") {
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return "\"\(value)\""
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}
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return value
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}.joined(separator: ",")
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}.joined(separator: "\n")
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return head + cont
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}
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}
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@ -1,43 +0,0 @@
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//
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// EnumeratedView.swift
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// SwiftCSV
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//
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// Created by Christian Tietze on 25/10/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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import Foundation
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public struct EnumeratedView: View {
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public struct Column {
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public let header: String
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public let rows: [String]
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}
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public private(set) var rows: [[String]]
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public private(set) var columns: [Column]
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public init(header: [String], text: String, delimiter: Character, limitTo: Int? = nil, loadColumns: Bool = false) throws {
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var rows = [[String]]()
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var columns: [EnumeratedView.Column] = []
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try Parser.enumerateAsArray(text: text, delimiter: delimiter, limitTo: limitTo, startAt: 1) { fields in
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rows.append(fields)
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}
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if loadColumns {
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columns = header.enumerated().map { (index: Int, header: String) -> EnumeratedView.Column in
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return EnumeratedView.Column(
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header: header,
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rows: rows.map { $0[index] })
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}
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}
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self.rows = rows
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self.columns = columns
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}
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}
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@ -1,32 +0,0 @@
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//
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// NamedView.swift
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// SwiftCSV
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//
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// Created by Christian Tietze on 22/10/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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public struct NamedView: View {
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public var rows: [[String : String]]
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public var columns: [String : [String]]
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public init(header: [String], text: String, delimiter: Character, limitTo: Int? = nil, loadColumns: Bool = false) throws {
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var rows = [[String: String]]()
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var columns = [String: [String]]()
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try Parser.enumerateAsDict(header: header, content: text, delimiter: delimiter, limitTo: limitTo) { dict in
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rows.append(dict)
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}
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if loadColumns {
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for field in header {
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columns[field] = rows.map { $0[field] ?? "" }
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}
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}
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self.rows = rows
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self.columns = columns
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}
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}
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@ -1,111 +0,0 @@
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//
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// Parser.swift
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// SwiftCSV
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//
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// Created by Will Richardson on 13/04/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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extension CSV {
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/// Parse the file and call a block on each row, passing it in as a list of fields
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/// limitTo will limit the result to a certain number of lines
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public func enumerateAsArray(limitTo: Int? = nil, startAt: Int = 0, _ block: @escaping ([String]) -> ()) throws {
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try Parser.enumerateAsArray(text: self.text, delimiter: self.delimiter, limitTo: limitTo, startAt: startAt, block: block)
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}
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public func enumerateAsDict(_ block: @escaping ([String : String]) -> ()) throws {
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try Parser.enumerateAsDict(header: self.header, content: self.text, delimiter: self.delimiter, block: block)
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}
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}
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enum Parser {
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static func array(text: String, delimiter: Character, limitTo: Int? = nil, startAt: Int = 0) throws -> [[String]] {
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var rows = [[String]]()
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try enumerateAsArray(text: text, delimiter: delimiter) { row in
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rows.append(row)
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}
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return rows
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}
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/// Parse the text and call a block on each row, passing it in as a list of fields.
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///
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/// - parameter text: Text to parse.
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/// - parameter delimiter: Character to split row and header fields by (default is ',')
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/// - parameter limitTo: If set to non-nil value, enumeration stops
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/// at the row with index `limitTo` (or on end-of-text, whichever is earlier.
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/// - parameter startAt: Offset of rows to ignore before invoking `block` for the first time. Default is 0.
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/// - parameter block: Callback invoked for every parsed row between `startAt` and `limitTo` in `text`.
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static func enumerateAsArray(text: String, delimiter: Character, limitTo: Int? = nil, startAt: Int = 0, block: @escaping ([String]) -> ()) throws {
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var currentIndex = text.startIndex
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let endIndex = text.endIndex
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var fields = [String]()
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var field = ""
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var count = 0
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func finishRow() {
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fields.append(String(field))
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if count >= startAt {
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block(fields)
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}
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count += 1
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fields = [String]()
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field = ""
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}
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var state: ParsingState = ParsingState(
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delimiter: delimiter,
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finishRow: finishRow,
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appendChar: { field.append($0) },
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finishField: {
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fields.append(field)
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field = ""
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})
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func limitReached(_ count: Int) -> Bool {
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guard let limitTo = limitTo,
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count >= limitTo
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else { return false }
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return true
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}
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while currentIndex < endIndex {
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let char = text[currentIndex]
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try state.change(char)
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if limitReached(count) {
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break
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}
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currentIndex = text.index(after: currentIndex)
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}
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if !fields.isEmpty || !field.isEmpty || limitReached(count) {
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fields.append(field)
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block(fields)
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}
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}
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static func enumerateAsDict(header: [String], content: String, delimiter: Character, limitTo: Int? = nil, block: @escaping ([String : String]) -> ()) throws {
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let enumeratedHeader = header.enumerated()
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try enumerateAsArray(text: content, delimiter: delimiter, startAt: 1) { fields in
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var dict = [String: String]()
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for (index, head) in enumeratedHeader {
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dict[head] = index < fields.count ? fields[index] : ""
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}
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block(dict)
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}
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}
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}
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@ -1,106 +0,0 @@
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//
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// ParsingState.swift
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// SwiftCSV
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//
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// Created by Christian Tietze on 25/10/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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public enum CSVParseError: Error {
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case generic(message: String)
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case quotation(message: String)
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}
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/// State machine of parsing CSV contents character by character.
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struct ParsingState {
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private(set) var atStart = true
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private(set) var parsingField = false
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private(set) var parsingQuotes = false
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private(set) var innerQuotes = false
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let delimiter: Character
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let finishRow: () -> Void
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let appendChar: (Character) -> Void
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let finishField: () -> Void
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init(delimiter: Character,
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finishRow: @escaping () -> Void,
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appendChar: @escaping (Character) -> Void,
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finishField: @escaping () -> Void) {
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self.delimiter = delimiter
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self.finishRow = finishRow
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self.appendChar = appendChar
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self.finishField = finishField
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}
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mutating func change(_ char: Character) throws {
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if atStart {
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if char == "\"" {
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atStart = false
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parsingQuotes = true
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} else if char == delimiter {
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finishField()
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} else if char.isNewline {
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finishRow()
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} else {
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parsingField = true
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atStart = false
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appendChar(char)
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}
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} else if parsingField {
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if innerQuotes {
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if char == "\"" {
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appendChar(char)
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innerQuotes = false
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} else {
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throw CSVParseError.quotation(message: "Can't have non-quote here: \(char)")
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}
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} else {
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if char == "\"" {
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innerQuotes = true
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} else if char == delimiter {
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atStart = true
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parsingField = false
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innerQuotes = false
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finishField()
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} else if char.isNewline {
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atStart = true
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parsingField = false
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innerQuotes = false
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finishRow()
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} else {
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appendChar(char)
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}
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}
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} else if parsingQuotes {
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if innerQuotes {
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if char == "\"" {
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appendChar(char)
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innerQuotes = false
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} else if char == delimiter {
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atStart = true
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parsingField = false
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innerQuotes = false
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finishField()
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} else if char.isNewline {
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atStart = true
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parsingQuotes = false
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innerQuotes = false
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finishRow()
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} else {
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throw CSVParseError.quotation(message: "Can't have non-quote here: \(char)")
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}
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} else {
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if char == "\"" {
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innerQuotes = true
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} else {
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appendChar(char)
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}
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}
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} else {
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throw CSVParseError.generic(message: "me_irl")
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}
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}
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}
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@ -1,23 +0,0 @@
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//
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// String+Lines.swift
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// SwiftCSV
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//
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// Created by Naoto Kaneko on 2/24/16.
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// Copyright © 2016 Naoto Kaneko. All rights reserved.
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//
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extension String {
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internal var firstLine: String {
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var current = startIndex
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while current < endIndex && self[current].isNewline == false {
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current = self.index(after: current)
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}
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return String(self[..<current])
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}
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}
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extension Character {
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internal var isNewline: Bool {
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return self == "\n" || self == "\r\n" || self == "\r"
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}
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}
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