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Code Issues Releases Wiki Activity

Add function to strip Markdown-formatted images

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This commit is contained in:
Angelo Stavrow 2020-11-06 14:01:33 -05:00
parent 60ce0868ca
commit 00bd18463e
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GPG Key ID: 1A49C7064E060EEE
1 changed files with 34 additions and 0 deletions
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34
Shared/PostList/PostListModel.swift
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@ -40,6 +40,7 @@ private extension PostListModel {
func stripMarkdown(from string: String) -> String {
var strippedString = string
strippedString = stripHeadingOctothorpes(from: strippedString)
strippedString = stripImages(from: strippedString, keepAltText: true)
return strippedString
}
@ -65,6 +66,39 @@ private extension PostListModel {
return headinglessString
}
func stripImages(from string: String, keepAltText: Bool = false) -> String {
let pattern = #"!\[[\"]?(.*?)[\"|]?\]\(.*?\)"#
var processedComponents: [String] = []
let components = string.components(separatedBy: .newlines)
for component in components {
if component.isEmpty { continue }
var processedString: String = component
if keepAltText {
let regex = try? NSRegularExpression(pattern: pattern, options: [])
if let matches = regex?.matches(
in: component, options: [], range: NSRange(location: 0, length: component.utf16.count)
) {
for match in matches {
if let range = Range(match.range(at: 1), in: component) {
processedString = "\(component[range])"
}
}
}
} else {
let range = component.startIndex..<component.endIndex
processedString = component.replacingOccurrences(
of: pattern,
with: "",
options: .regularExpression,
range: range
)
}
if processedString.isEmpty { continue }
processedComponents.append(processedString)
}
return processedComponents.joined(separator: "\n\n")
}
func extractLede(from string: String) -> String {
let terminatingCharacters = CharacterSet(charactersIn: ".。?").union(.newlines)