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|
package editor
import (
"bytes"
"strings"
)
// RepeatSelect returns the []byte of a <select> HTML element plus internal <options> with a label.
// IMPORTANT:
// The `fieldName` argument will cause a panic if it is not exactly the string
// form of the struct field that this editor input is representing
func RepeatSelect(fieldName string, p interface{}, attrs, options map[string]string) []byte {
// options are the value attr and the display value, i.e.
// <option value="{map key}">{map value}</option>
scope := tagNameFromStructField(fieldName, p)
html := &bytes.Buffer{}
html.WriteString(`<span class="__ponzu-repeat ` + scope + `">`)
// find the field values in p to determine if an option is pre-selected
fieldVals := valueFromStructField(fieldName, p)
vals := strings.Split(fieldVals, "__ponzu")
attrs["class"] = "browser-default"
// loop through vals and create selects and options for each, adding to html
if len(vals) > 0 {
for i, val := range vals {
sel := &element{
TagName: "select",
Attrs: attrs,
Name: tagNameFromStructFieldMulti(fieldName, i, p),
viewBuf: &bytes.Buffer{},
}
// only add the label to the first select in repeated list
if i == 0 {
sel.label = attrs["label"]
}
// create options for select element
var opts []*element
// provide a call to action for the select element
cta := &element{
TagName: "option",
Attrs: map[string]string{"disabled": "true", "selected": "true"},
data: "Select an option...",
viewBuf: &bytes.Buffer{},
}
// provide a selection reset (will store empty string in db)
reset := &element{
TagName: "option",
Attrs: map[string]string{"value": ""},
data: "None",
viewBuf: &bytes.Buffer{},
}
opts = append(opts, cta, reset)
for k, v := range options {
optAttrs := map[string]string{"value": k}
if k == val {
optAttrs["selected"] = "true"
}
opt := &element{
TagName: "option",
Attrs: optAttrs,
data: v,
viewBuf: &bytes.Buffer{},
}
opts = append(opts, opt)
}
html.Write(domElementWithChildrenSelect(sel, opts))
}
}
html.WriteString(`</span>`)
return append(html.Bytes(), RepeatController(fieldName, p, "select")...)
}
// RepeatController generates the javascript to control any repeatable form
// element in an editor based on its type, field name and HTML tag name
func RepeatController(fieldName string, p interface{}, htmlTagName string) []byte {
scope := tagNameFromStructField(fieldName, p)
script := `
<script>
$(function() {
// define the scope of the repeater
var scope = $('.__ponzu-repeat.` + scope + `');
var getChildren = function() {
return scope.find('` + htmlTagName + `')
}
var resetFieldNames = function() {
// loop through children, set its name to the fieldName.i where
// i is the current index number of children array
var children = getChildren();
for (var i = 0; i < children.length; i++) {
var el = children[i];
$(el).attr('name', '` + scope + `.'+String(i));
// reset controllers
$(el).find('.controls').remove();
}
applyRepeatControllers();
}
var addRepeater = function(e) {
e.preventDefault();
// find and clone the repeatable input-like element
var controls = $(e.target).parent();
var clone = controls.parent().clone();
// if repeat has label, remove it
clone.find('label').remove();
// remove the pre-filled value from clone
clone.find('` + htmlTagName + `').val("");
// remove controls if already present
clone.find('.controls').remove();
// add clone to scope and reset field name attributes
scope.append(clone);
resetFieldNames();
}
var delRepeater = function(e) {
e.preventDefault();
// do nothing if the input is the only child
var children = getChildren();
if (children.length === 1) {
return;
}
var del = e.target;
// pass label onto next input-like element if del 0 index
var wrapper = $(del).parent().parent();
if (wrapper.find('` + htmlTagName + `').attr('name') === '` + scope + `.0') {
wrapper.next().append(wrapper.find('label'))
}
// find the outermost element which is the input-like element
// within the scope that contains the repeater control (-) and
// delete it
$(del).parent().parent().remove();
resetFieldNames();
}
var createControls = function() {
// create + / - controls for each input-like child element of scope
var add = $('<button>+</button>');
add.addClass('repeater-add');
add.addClass('btn-flat waves-effect waves-green');
var del = $('<button>-</button>');
del.addClass('repeater-del');
del.addClass('btn-flat waves-effect waves-red');
var controls = $('<span></span>');
controls.addClass('controls');
controls.addClass('right');
// bind listeners to child's controls
add.on('click', addRepeater);
del.on('click', delRepeater);
controls.append(add);
controls.append(del);
return controls;
}
var applyRepeatControllers = function() {
// add controls to each child
var children = getChildren()
for (var i = 0; i < children.length; i++) {
var el = children[i];
$(el).parent().find('.controls').remove();
var controls = createControls();
$(el).parent().append(controls);
}
}
applyRepeatControllers();
});
</script>
`
return []byte(script)
}
|
