// Handles calls to list user accounts
// GET /v1/users
func (s *Service) listUsersHandler(w http.ResponseWriter, r *http.Request) {
// Get the authenticated user from the request context
authenticatedUser, err := GetAuthenticatedUser(r)
if err != nil {
response.UnauthorizedError(w, err.Error())
return
}
// Check permissions
if err = checkListUsersPermissions(authenticatedUser); err != nil {
response.Error(w, err.Error(), http.StatusForbidden)
return
}
// Get pagination params
page, limit, sorts, err := pagination.GetParams(r, []string{"id"})
if err != nil {
response.Error(w, err.Error(), http.StatusBadRequest)
return
}
// Count total number of results
count, err := s.PaginatedUsersCount()
if err != nil {
response.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Get pagination links
first, last, previous, next, err := pagination.GetLinks(r.URL, count, page, limit)
if err != nil {
response.Error(w, err.Error(), http.StatusBadRequest)
return
}
// Get paginated results
users, err := s.FindPaginatedUsers(
pagination.GetOffsetForPage(count, page, limit),
limit,
sorts,
)
if err != nil {
response.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Create response
self := util.GetCurrentURL(r)
listUsersResponse, err := NewListUsersResponse(
count, page,
self, first, last, previous, next,
users,
)
if err != nil {
response.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Write JSON response
response.WriteJSON(w, listUsersResponse, http.StatusOK)
}
func testGetLinks(t *testing.T, testURL string) {
var (
urlObject *url.URL
first string
last string
previous string
next string
err error
)
// Test URL object
urlObject, err = url.Parse(testURL)
if err != nil {
log.Fatal(err)
}
// Test with zero results
first, last, previous, next, err = pagination.GetLinks(
urlObject,
0, // count
1, // page
2, // limit
)
if assert.Nil(t, err) {
assert.Equal(t, "/foobar?hello=world&page=1", first)
assert.Equal(t, "/foobar?hello=world&page=1", last)
assert.Equal(t, "", previous)
assert.Equal(t, "", next)
}
// Test first page
first, last, previous, next, err = pagination.GetLinks(
urlObject,
10, // count
1, // page
2, // limit
)
if assert.Nil(t, err) {
assert.Equal(t, "/foobar?hello=world&page=1", first)
assert.Equal(t, "/foobar?hello=world&page=5", last)
assert.Equal(t, "", previous)
assert.Equal(t, "/foobar?hello=world&page=2", next)
}
// Test middle page
first, last, previous, next, err = pagination.GetLinks(
urlObject,
10, // count
2, // page
2, // limit
)
if assert.Nil(t, err) {
assert.Equal(t, "/foobar?hello=world&page=1", first)
assert.Equal(t, "/foobar?hello=world&page=5", last)
assert.Equal(t, "/foobar?hello=world&page=1", previous)
assert.Equal(t, "/foobar?hello=world&page=3", next)
}
// Test last page
first, last, previous, next, err = pagination.GetLinks(
urlObject,
10, // count
5, // page
2, // limit
)
if assert.Nil(t, err) {
assert.Equal(t, "/foobar?hello=world&page=1", first)
assert.Equal(t, "/foobar?hello=world&page=5", last)
assert.Equal(t, "/foobar?hello=world&page=4", previous)
assert.Equal(t, "", next)
}
// Test page too big
first, last, previous, next, err = pagination.GetLinks(
urlObject,
10, // count
6, // page
2, // limit
)
if assert.NotNil(t, err) {
assert.Equal(t, pagination.ErrPageTooBig, err)
}
// Test when limit > count
first, last, previous, next, err = pagination.GetLinks(
urlObject,
10, // count
1, // page
12, // limit
)
if assert.Nil(t, err) {
assert.Equal(t, "/foobar?hello=world&page=1", first)
assert.Equal(t, "/foobar?hello=world&page=1", last)
assert.Equal(t, "", previous)
assert.Equal(t, "", next)
}
}