proekton.com/assets/index.js

// Fancy widget initializations ------------------------

$(function() {
    var $specSelects = $('.-spec-select')
    
    var select2Options = {
        language: 'ru',
        //minimumInputLength: 1, // Commented out to immediately load remote data
        placeholder: '', // Required by `allowClear`
        allowClear: true,
        
        ajax: {
            url: '/api/specializations/',
            dataType: 'json',
            quietMillis: 250,
            cache: true,
            
            data: function(term, page) {
                return {
                    'name__icontains': term,
                    page: page,
                }
            },
            
            results: function(data, page) {
                return {
                    results: _.map(function(item) {
                        return {
                            text: item.name,
                            id: item.id,
                            origItem: item,
                        }
                    }, data.results),
                    
                    more: (page * 10) < data.count,
                }
            },
        },
        
        initSelection: function(element, callback) {
            var id = $(element).val()
            
            if (id !== '') {
                $.ajax('/api/specializations/' + id, {dataType: 'json'})
                    .then(function(data) {callback(data)})
            }
        }
    }
    
    $specSelects.select2(select2Options)
    
    var $specSelect1 = $('.-spec-select-level-1')
    var $specSelect2 = $('.-spec-select-level-2')
    var $specSelect3 = $('.-spec-select-level-3')
    var $specSelect4 = $('.-spec-select-level-4')
    
    $specSelects.on('change', function($evt) {
        getSpecializationTree($evt.added.origItem).then(function(specs) {
            $specSelect1.select2('data', specs.specLevel1 ? {id: specs.specLevel1.id, text: specs.specLevel1.name, origItem: specs.specLevel1} : null)
            $specSelect2.select2('data', specs.specLevel2 ? {id: specs.specLevel2.id, text: specs.specLevel2.name, origItem: specs.specLevel2} : null)
            $specSelect3.select2('data', specs.specLevel3 ? {id: specs.specLevel3.id, text: specs.specLevel3.name, origItem: specs.specLevel3} : null)
            $specSelect4.select2('data', specs.specLevel4 ? {id: specs.specLevel4.id, text: specs.specLevel4.name, origItem: specs.specLevel4} : null)
        })
    })
})




function getSpecializationTree(spec) {
    var specLevel1, specLevel2, specLevel3, specLevel4
    specLevel1 = specLevel2 = specLevel3 = specLevel4 = null
    
    if (spec.level === 1) {
        specLevel1 = spec
        return $.when({specLevel1: specLevel1, specLevel2: specLevel2, specLevel3: specLevel3, specLevel4: specLevel4})
    } else if (spec.level === 2) {
        specLevel2 = spec
        
        return $.ajax({url: '/api/specializations/' + specLevel2.parent.id + '/', method: 'GET'})
            .then(function(spec) {
                specLevel1 = spec
                return {specLevel1: specLevel1, specLevel2: specLevel2, specLevel3: specLevel3, specLevel4: specLevel4}
            })
    } else if (spec.level === 3) {
        specLevel3 = spec
        
        return $.ajax({url: '/api/specializations/' + specLevel3.parent.id + '/', method: 'GET'})
            .then(function(spec) {
                specLevel2 = spec
                
                return $.ajax({url: '/api/specializations/' + specLevel2.parent.id + '/', method: 'GET'})
                    .then(function(spec) {
                        specLevel1 = spec
                        return {specLevel1: specLevel1, specLevel2: specLevel2, specLevel3: specLevel3, specLevel4: specLevel4}
                    })
            })
    } else if (spec.level === 4) {
        specLevel4 = spec
        
        return $.ajax({url: '/api/specializations/' + specLevel4.parent.id + '/', method: 'GET'})
            .then(function(spec) {
                specLevel3 = spec
                
                return $.ajax({url: '/api/specializations/' + specLevel3.parent.id + '/', method: 'GET'})
                    .then(function(spec) {
                        specLevel2 = spec
                        
                        return $.ajax({url: '/api/specializations/' + specLevel2.parent.id + '/', method: 'GET'})
                            .then(function(spec) {
                                specLevel1 = spec
                                return {specLevel1: specLevel1, specLevel2: specLevel2, specLevel3: specLevel3, specLevel4: specLevel4}
                            })
                    })
            })
    }
}





// Utils -----------------------------------------------


function humanFileSize(bytes, si) {
    var thresh = si ? 1000 : 1024
    
    if (Math.abs(bytes) < thresh)
        return bytes + ' B'
    
    var units = si
        ? ['kB','MB','GB','TB','PB','EB','ZB','YB']
        : ['KiB','MiB','GiB','TiB','PiB','EiB','ZiB','YiB']
    
    var u = -1
    
    do {
        bytes /= thresh
        ++u
    } while (Math.abs(bytes) >= thresh && u < units.length-1)
    
    return bytes.toFixed(1) + ' ' + units[u]
}


//---------------------------------------------------


$('#realtyId').on('change', function($evt) {
    var realtyId = Number($(this).val())
    
    if (realtyId) {
        loadRealtyDetails(realtyId).then(function(res) {
            $('#realtyName').val(res.name)
            $('#realtyBuildingClassificationId').val(res.building_classification.id).change()
            $('#realtyConstructionTypeId').val(res.construction_type.id).change()
            $('#realtyLocationId').val(res.location.id).change()
        })
    } else {
        $('#realtyName').val('')
        $('#realtyBuildingClassificationId').val('').change()
        $('#realtyConstructionTypeId').val('').change()
        $('#realtyLocationId').val('').change()
    }
})

function loadRealtyDetails(realtyId) {
    return $.ajax({
        url: '/api/realties/' + realtyId + '/',
        method: 'GET',
        dataType: 'json',
    })
        .then(function(res) {return res})
        .fail(function() {console.error('Failed', arguments)})
}


//---------------------------------------


var $fileUploadContainer = $('#fileUploadContainer')

$('#fileUploadAddBtn').on('click', function($evt) {
    $fileUploadContainer.find('.file-upload-widget').last().children('.file-upload-input').click()
})

$fileUploadContainer.on('change', '.file-upload-input', function($evt) {
    var $fileInput = $(this)
    var $fileUploadWidget = $fileInput.parent('.file-upload-widget')
    var filePath = $fileInput.val().replace(/\\/g, '/')
    var fileName = path.basename(filePath)
    //var fileExt = path.extname(filePath)
    var fileSize = $fileInput.get(0).files && humanFileSize($fileInput.get(0).files[0].size)
    
    if (fileName) {
        $fileUploadWidget.children('.file-upload-label').text(fileName + ' ' + fileSize)
        
        var $newFileUploadWidget = $fileUploadWidget.clone()
        $newFileUploadWidget.children('.file-upload-label').text('')
        
        $fileUploadContainer.children('ul').first().append($newFileUploadWidget)
        
        $fileUploadWidget.css('display', 'block')
    }
})

$fileUploadContainer.on('click', '.file-upload-remove-btn', function($evt) {
    var $btn = $(this)
    $btn.parent('.file-upload-widget').remove()
})

$fileUploadContainer.on('click', '.existing-file-remove-btn', function($evt) {
    var $btn = $(this)
    $btn.parent('.existing-file-widget').remove()
})