How do I get multiple JSON objects from api call? - ios

Question

I am trying to make an API call to the GitLab API to get the projects that are available to a particular user.
I can get one project of an index of my choosing, put it into a ProjectModel with the projectId and the projectName but I can not figure out how to get all of them into an array of ProjectModels.
By printing then I can see them all being printed in the console but it will not let me append them to an array.
It is in the parseJSON function that I am trying to get a hold of all of the projects.
Does anyone have any suggestions?
This is my manager to fetch the projects:
protocol FetchProjectsManagerDelegate {
func didUpdateProjects(_ fetchProjectsManager: FetchProjectsManager, project: ProjectModel?)
func didFailWithError(error: Error)
}
struct FetchProjectsManager {
let projectsURL = "secret"
var delegate: FetchProjectsManagerDelegate?
func fetchProjects(privateToken: String) {
let privateTokenString = "\(projectsURL)projects?private_token=\(privateToken)"
performRequest(with: privateTokenString)
}
func performRequest(with privateTokenString: String) {
// Create url
if let url = URL(string: privateTokenString) {
// Create URLSession
let session = URLSession(configuration: .default)
// Give the session a task
let task = session.dataTask(with: url) { data, response, error in
if error != nil {
self.delegate?.didFailWithError(error: error!)
return
}
if let safeData = data {
if let project = self.parseJSON(safeData) {
self.delegate?.didUpdateProjects(self, project: project)
}
}
}
// Start the task
task.resume()
}
}
func parseJSON(_ projectData: Data) -> ProjectModel? {
let decoder = JSONDecoder()
do {
let decodedData = try decoder.decode([Project].self, from: projectData)
for project in decodedData {
print(project)
}
let projectId = decodedData[0].id
let projectName = decodedData[0].name
let project = ProjectModel(projectId: projectId, projectName: projectName)
return project
} catch {
delegate?.didFailWithError(error: error)
return nil
}
}
}
This is my project model
struct ProjectModel {
let projectId: Int
let projectName: String
}

Answer 1

Your parseJson method only returns a single project instead of all of them, change it to
func parseJSON(_ projectData: Data) -> [ProjectModel]? {
let decoder = JSONDecoder()
do {
let decodedData = try decoder.decode([Project].self, from: projectData)
let projects = decodedData.map { ProjectModel(projectId: $0.id,
projectName: $0.name) }
return projects
} catch {
delegate?.didFailWithError(error: error)
return nil
}
}
and you of course need to update didUpdateProjects so that it takes an array of ProjectModel or call it in a loop