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SummarizeViewModel.swift
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SummarizeViewModel.swift
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// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import Foundation
import GoogleGenerativeAI
import OSLog
@MainActor
class SummarizeViewModel: ObservableObject {
private var logger = Logger(subsystem: Bundle.main.bundleIdentifier!, category: "generative-ai")
@Published
var outputText = ""
@Published
var errorMessage: String?
@Published
var inProgress = false
private var model: GenerativeModel?
init() {
model = GenerativeModel(name: "gemini-1.5-flash-latest", apiKey: APIKey.default)
}
func summarize(inputText: String) async {
defer {
inProgress = false
}
guard let model else {
return
}
do {
inProgress = true
errorMessage = nil
outputText = ""
let prompt = "Summarize the following text for me: \(inputText)"
let outputContentStream = model.generateContentStream(prompt)
// stream response
for try await outputContent in outputContentStream {
guard let line = outputContent.text else {
return
}
outputText = outputText + line
}
} catch {
logger.error("\(error.localizedDescription)")
errorMessage = error.localizedDescription
}
}
}