Assign issues from the phone: the Assignees action, with Assign me and any username, saved as the whole set (refs #4) 2a15621eca66

- **Assign issues from the phone (#4):** an issue's Assignees action shows who it is assigned to, each removable, with Assign me and a field for anyone's username; saved as the whole set (triage access on the hub).

    /** The issue's whole set of assignees (triage, #4). */

    suspend fun setIssueAssignees(owner: String, name: String, number: Long, assignees: List<String>): Issue

    override suspend fun setIssueAssignees(owner: String, name: String, number: Long, assignees: List<String>): Issue =

        sendJson("PATCH", url("repos", owner, name, "issues", number.toString()), buildJsonObject {

            put("assignees", JsonArray(assignees.map { JsonPrimitive(it) }))

        }, Issue.serializer())

import androidx.compose.material.icons.outlined.PersonAdd

import androidx.compose.material.icons.outlined.Close

import androidx.compose.material.icons.outlined.Add

fun IssueScreen(vm: IssueViewModel, canWrite: Boolean, onBack: () -> Unit, me: String = "") {

    var assigning by remember { mutableStateOf(false) }

                IconButton(onClick = { assigning = true }) { Icon(Icons.Outlined.PersonAdd, contentDescription = "Assignees") }

    if (assigning) {

        AssigneePicker(current = (state as? Load.Ready)?.value?.issue?.assignees.orEmpty(), me = me, onSave = vm::setAssignees, onDone = { assigning = false })

    }

                onDone()

            }) { Text("Save") }

        },

        dismissButton = { TextButton(onClick = onDone) { Text("Cancel") } },

    )

}

/**

 * Who the issue is assigned to (#4): each removable, you with one tap, and

 * anyone by their username; saved as the whole set (triage on the hub).

 */

@Composable

private fun AssigneePicker(current: List<String>, me: String, onSave: (List<String>) -> Unit, onDone: () -> Unit) {

    val chosen = remember { mutableStateListOf<String>().apply { addAll(current) } }

    var name by remember { mutableStateOf("") }

    AlertDialog(

        onDismissRequest = onDone,

        title = { Text("Assignees") },

        text = {

            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {

                if (chosen.isEmpty()) Text("No one yet.", color = MaterialTheme.colorScheme.onSurfaceVariant)

                chosen.forEach { who ->

                    Row(verticalAlignment = Alignment.CenterVertically) {

                        Text("@$who", modifier = Modifier.weight(1f))

                        IconButton(onClick = { chosen -= who }) { Icon(Icons.Outlined.Close, contentDescription = "Unassign $who") }

                    }

                }

                if (me.isNotEmpty() && me !in chosen) TextButton(onClick = { chosen += me }) { Text("Assign me") }

                OutlinedTextField(

                    value = name,

                    onValueChange = { name = it.trim() },

                    label = { Text("Username") },

                    singleLine = true,

                    trailingIcon = {

                        IconButton(enabled = name.isNotBlank(), onClick = {

                            val who = name.removePrefix("@")

                            if (who.isNotEmpty() && who !in chosen) chosen += who

                            name = ""

                        }) { Icon(Icons.Outlined.Add, contentDescription = "Add") }

                    },

                )

            }

        },

        confirmButton = {

            TextButton(onClick = {

                onSave(chosen.toList())

    /** Who the issue is assigned to, as the whole set (#4): names trimmed, `@` dropped, each once. */

    fun setAssignees(names: List<String>) =

        act({ swap(api.setIssueAssignees(owner, name, number, names.map { it.trim().removePrefix("@") }.filter { it.isNotEmpty() }.distinct())) })

                IssueScreen(rememberViewModel { IssueViewModel(api, r.owner, r.name, r.number) }, canWrite = session.canWrite, onBack = { nav.popBackStack() }, me = session.username)

    override suspend fun setIssueAssignees(owner: String, name: String, number: Long, assignees: List<String>): io.oxygenhub.android.api.Issue {

        val i = issueStore.getValue(number).copy(assignees = assignees)

        issueStore[number] = i

        calls += "assign $number ${assignees.joinToString(",")}"

        return i

    }

    fun assigneesAreSetAsAWholeSetTidied() {

        val vm = IssueViewModel(api, "andymccall", "demo", 7)

        vm.setAssignees(listOf(" andymccall ", "@bob", "bob", ""))

        assertEquals(listOf("andymccall", "bob"), thread(vm).issue.assignees)

        assertTrue("assign 7 andymccall,bob" in api.calls)

        vm.setAssignees(emptyList())

        assertEquals(emptyList<String>(), thread(vm).issue.assignees)

    }

    @Test