DFSearchKit

// Create a new memory index using the default settings
guard let indexer = DFSearchIndex.Memory() else {
   assert(false)
}

indexer.add(textURL: "doc-url://d1.txt", text: "This is my first document")
	
let fileURL = // <the url for some file on disk>
indexer.add(fileURL, mimeType: "application/pdf")

// ... add more documents

indexer.flush()
   
let searchresult = indexer.search("first")

// Do something with the search results

let indexData = Data(...)
guard let indexer = DFSearchIndex.Memory(data: indexData) else {
   assert(false)
}

let newIndexData = indexer.data()

// Create a index on disk
let newFileURL = // <some file url>
let createProperties = DSFSearchIndex.CreateProperties() // search index properties
guard let newIndex = DFSearchIndex.File(fileURL: newFileURL, properties: createProperties) else {
   assert(false)
}

// Open a file index
let existingFileURL = // <some file url>
guard let fileIndex = DFSearchIndex.File(fileURL: existingFileURL, writable: true) else {
   assert(false)
}

let documentURL = URL(string: ("doc-url://d1.txt")!
fileIndex.add(documentURL, text: "This is my first document"))
	
let fileURL = // <the url for some file on disk>
fileIndex.add(fileURL, mimeType: "application/pdf")

// Flush the index so that it is updated for searching
fileIndex.flush()

// Perform a basic search for the work 'first'
var result = indexer.search("first")

fileIndex.save()
fileIndex.close()

guard let searchIndex = DFSearchIndex.Memory() else {
   assert(false)
}

let asyncController = DFSearchIndex.AsyncController(index: searchIndex, delegate: nil)

// Create a file task containing the URLs to be indexed
let addTask = DFSearchIndex.AsyncController.FileTask(<file urls to add>)

asyncController.addURLs(async: addTask, complete: { task in
    // <block that is executed when the files have been added to the index>
})
	
...

// Create a file task containing the URLs to be removed

let removeTask = DFSearchIndex.AsyncController.FileTask(<file urls to remove>)
asyncController.removeURLs(async: removeTask, complete: { task in
	// <block that is executed when the files have been removed from the index>
})
		

guard let searchIndex = DFSearchIndex.Memory() else {
   assert(false)
}

// Add some documents...
searchIndex.add(textURL: "doc-url://d1.txt", text: "This is my first document"))

// Flush the index
searchIndex.flush()

// Search for the word 'first'
let searchResult = indexer.search("first")
	// searchResult.count == 1
	// searchResult[0].url == firstURL
	// searchResult[0].score == 1

searchIndex.save()
searchIndex.close()

/// ... load documents ...
let search = indexer.progressiveSearch(query: "dog")
var hasMoreResults = true
repeat {
   var searchChunk = search.next(10)
   
   // ... do something with searchChunk...
   
   hasMoreResults = searchChunk.moreResults
}
while hasMoreResults

let text = // <some text
let summary = DFSummarizer(text)

// Get the number of sentences in the text
let sentenceCount = summary.sentenceCount()

// Get the number of paragraphs in the text
let paragraphCount = summary.paragraphCount()