(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = global || self, global.SanityImageUrlBuilder = factory());
})(this, (function () {
  function _extends() {
    _extends = Object.assign || function (target) {
      for (var i = 1; i < arguments.length; i++) {
        var source = arguments[i];

        for (var key in source) {
          if (Object.prototype.hasOwnProperty.call(source, key)) {
            target[key] = source[key];
          }
        }
      }

      return target;
    };

    return _extends.apply(this, arguments);
  }

  function _unsupportedIterableToArray(o, minLen) {
    if (!o) return;
    if (typeof o === "string") return _arrayLikeToArray(o, minLen);
    var n = Object.prototype.toString.call(o).slice(8, -1);
    if (n === "Object" && o.constructor) n = o.constructor.name;
    if (n === "Map" || n === "Set") return Array.from(o);
    if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
  }

  function _arrayLikeToArray(arr, len) {
    if (len == null || len > arr.length) len = arr.length;

    for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

    return arr2;
  }

  function _createForOfIteratorHelperLoose(o, allowArrayLike) {
    var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
    if (it) return (it = it.call(o)).next.bind(it);

    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
      if (it) o = it;
      var i = 0;
      return function () {
        if (i >= o.length) return {
          done: true
        };
        return {
          done: false,
          value: o[i++]
        };
      };
    }

    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
  }

  var example = 'image-Tb9Ew8CXIwaY6R1kjMvI0uRR-2000x3000-jpg';
  function parseAssetId(ref) {
    var _ref$split = ref.split('-'),
        id = _ref$split[1],
        dimensionString = _ref$split[2],
        format = _ref$split[3];

    if (!id || !dimensionString || !format) {
      throw new Error("Malformed asset _ref '" + ref + "'. Expected an id like \"" + example + "\".");
    }

    var _dimensionString$spli = dimensionString.split('x'),
        imgWidthStr = _dimensionString$spli[0],
        imgHeightStr = _dimensionString$spli[1];

    var width = +imgWidthStr;
    var height = +imgHeightStr;
    var isValidAssetId = isFinite(width) && isFinite(height);

    if (!isValidAssetId) {
      throw new Error("Malformed asset _ref '" + ref + "'. Expected an id like \"" + example + "\".");
    }

    return {
      id: id,
      width: width,
      height: height,
      format: format
    };
  }

  var isRef = function isRef(src) {
    var source = src;
    return source ? typeof source._ref === 'string' : false;
  };

  var isAsset = function isAsset(src) {
    var source = src;
    return source ? typeof source._id === 'string' : false;
  };

  var isAssetStub = function isAssetStub(src) {
    var source = src;
    return source && source.asset ? typeof source.asset.url === 'string' : false;
  }; // Convert an asset-id, asset or image to an image record suitable for processing
  // eslint-disable-next-line complexity


  function parseSource(source) {
    if (!source) {
      return null;
    }

    var image;

    if (typeof source === 'string' && isUrl(source)) {
      // Someone passed an existing image url?
      image = {
        asset: {
          _ref: urlToId(source)
        }
      };
    } else if (typeof source === 'string') {
      // Just an asset id
      image = {
        asset: {
          _ref: source
        }
      };
    } else if (isRef(source)) {
      // We just got passed an asset directly
      image = {
        asset: source
      };
    } else if (isAsset(source)) {
      // If we were passed an image asset document
      image = {
        asset: {
          _ref: source._id || ''
        }
      };
    } else if (isAssetStub(source)) {
      // If we were passed a partial asset (`url`, but no `_id`)
      image = {
        asset: {
          _ref: urlToId(source.asset.url)
        }
      };
    } else if (typeof source.asset === 'object') {
      // Probably an actual image with materialized asset
      image = _extends({}, source);
    } else {
      // We got something that does not look like an image, or it is an image
      // that currently isn't sporting an asset.
      return null;
    }

    var img = source;

    if (img.crop) {
      image.crop = img.crop;
    }

    if (img.hotspot) {
      image.hotspot = img.hotspot;
    }

    return applyDefaults(image);
  }

  function isUrl(url) {
    return /^https?:\/\//.test("" + url);
  }

  function urlToId(url) {
    var parts = url.split('/').slice(-1);
    return ("image-" + parts[0]).replace(/\.([a-z]+)$/, '-$1');
  } // Mock crop and hotspot if image lacks it


  function applyDefaults(image) {
    if (image.crop && image.hotspot) {
      return image;
    } // We need to pad in default values for crop or hotspot


    var result = _extends({}, image);

    if (!result.crop) {
      result.crop = {
        left: 0,
        top: 0,
        bottom: 0,
        right: 0
      };
    }

    if (!result.hotspot) {
      result.hotspot = {
        x: 0.5,
        y: 0.5,
        height: 1.0,
        width: 1.0
      };
    }

    return result;
  }

  var SPEC_NAME_TO_URL_NAME_MAPPINGS = [['width', 'w'], ['height', 'h'], ['format', 'fm'], ['download', 'dl'], ['blur', 'blur'], ['sharpen', 'sharp'], ['invert', 'invert'], ['orientation', 'or'], ['minHeight', 'min-h'], ['maxHeight', 'max-h'], ['minWidth', 'min-w'], ['maxWidth', 'max-w'], ['quality', 'q'], ['fit', 'fit'], ['crop', 'crop'], ['saturation', 'sat'], ['auto', 'auto'], ['dpr', 'dpr'], ['pad', 'pad']];
  function urlForImage(options) {
    var spec = _extends({}, options || {});

    var source = spec.source;
    delete spec.source;
    var image = parseSource(source);

    if (!image) {
      throw new Error("Unable to resolve image URL from source (" + JSON.stringify(source) + ")");
    }

    var id = image.asset._ref || image.asset._id || '';
    var asset = parseAssetId(id); // Compute crop rect in terms of pixel coordinates in the raw source image

    var cropLeft = Math.round(image.crop.left * asset.width);
    var cropTop = Math.round(image.crop.top * asset.height);
    var crop = {
      left: cropLeft,
      top: cropTop,
      width: Math.round(asset.width - image.crop.right * asset.width - cropLeft),
      height: Math.round(asset.height - image.crop.bottom * asset.height - cropTop)
    }; // Compute hot spot rect in terms of pixel coordinates

    var hotSpotVerticalRadius = image.hotspot.height * asset.height / 2;
    var hotSpotHorizontalRadius = image.hotspot.width * asset.width / 2;
    var hotSpotCenterX = image.hotspot.x * asset.width;
    var hotSpotCenterY = image.hotspot.y * asset.height;
    var hotspot = {
      left: hotSpotCenterX - hotSpotHorizontalRadius,
      top: hotSpotCenterY - hotSpotVerticalRadius,
      right: hotSpotCenterX + hotSpotHorizontalRadius,
      bottom: hotSpotCenterY + hotSpotVerticalRadius
    }; // If irrelevant, or if we are requested to: don't perform crop/fit based on
    // the crop/hotspot.

    if (!(spec.rect || spec.focalPoint || spec.ignoreImageParams || spec.crop)) {
      spec = _extends({}, spec, fit({
        crop: crop,
        hotspot: hotspot
      }, spec));
    }

    return specToImageUrl(_extends({}, spec, {
      asset: asset
    }));
  } // eslint-disable-next-line complexity

  function specToImageUrl(spec) {
    var cdnUrl = (spec.baseUrl || 'https://cdn.sanity.io').replace(/\/+$/, '');
    var filename = spec.asset.id + "-" + spec.asset.width + "x" + spec.asset.height + "." + spec.asset.format;
    var baseUrl = cdnUrl + "/images/" + spec.projectId + "/" + spec.dataset + "/" + filename;
    var params = [];

    if (spec.rect) {
      // Only bother url with a crop if it actually crops anything
      var _spec$rect = spec.rect,
          left = _spec$rect.left,
          top = _spec$rect.top,
          width = _spec$rect.width,
          height = _spec$rect.height;
      var isEffectiveCrop = left !== 0 || top !== 0 || height !== spec.asset.height || width !== spec.asset.width;

      if (isEffectiveCrop) {
        params.push("rect=" + left + "," + top + "," + width + "," + height);
      }
    }

    if (spec.bg) {
      params.push("bg=" + spec.bg);
    }

    if (spec.focalPoint) {
      params.push("fp-x=" + spec.focalPoint.x);
      params.push("fp-y=" + spec.focalPoint.y);
    }

    var flip = [spec.flipHorizontal && 'h', spec.flipVertical && 'v'].filter(Boolean).join('');

    if (flip) {
      params.push("flip=" + flip);
    } // Map from spec name to url param name, and allow using the actual param name as an alternative


    SPEC_NAME_TO_URL_NAME_MAPPINGS.forEach(function (mapping) {
      var specName = mapping[0],
          param = mapping[1];

      if (typeof spec[specName] !== 'undefined') {
        params.push(param + "=" + encodeURIComponent(spec[specName]));
      } else if (typeof spec[param] !== 'undefined') {
        params.push(param + "=" + encodeURIComponent(spec[param]));
      }
    });

    if (params.length === 0) {
      return baseUrl;
    }

    return baseUrl + "?" + params.join('&');
  }

  function fit(source, spec) {
    var cropRect;
    var imgWidth = spec.width;
    var imgHeight = spec.height; // If we are not constraining the aspect ratio, we'll just use the whole crop

    if (!(imgWidth && imgHeight)) {
      return {
        width: imgWidth,
        height: imgHeight,
        rect: source.crop
      };
    }

    var crop = source.crop;
    var hotspot = source.hotspot; // If we are here, that means aspect ratio is locked and fitting will be a bit harder

    var desiredAspectRatio = imgWidth / imgHeight;
    var cropAspectRatio = crop.width / crop.height;

    if (cropAspectRatio > desiredAspectRatio) {
      // The crop is wider than the desired aspect ratio. That means we are cutting from the sides
      var height = Math.round(crop.height);
      var width = Math.round(height * desiredAspectRatio);
      var top = Math.max(0, Math.round(crop.top)); // Center output horizontally over hotspot

      var hotspotXCenter = Math.round((hotspot.right - hotspot.left) / 2 + hotspot.left);
      var left = Math.max(0, Math.round(hotspotXCenter - width / 2)); // Keep output within crop

      if (left < crop.left) {
        left = crop.left;
      } else if (left + width > crop.left + crop.width) {
        left = crop.left + crop.width - width;
      }

      cropRect = {
        left: left,
        top: top,
        width: width,
        height: height
      };
    } else {
      // The crop is taller than the desired ratio, we are cutting from top and bottom
      var _width = crop.width;

      var _height = Math.round(_width / desiredAspectRatio);

      var _left = Math.max(0, Math.round(crop.left)); // Center output vertically over hotspot


      var hotspotYCenter = Math.round((hotspot.bottom - hotspot.top) / 2 + hotspot.top);

      var _top = Math.max(0, Math.round(hotspotYCenter - _height / 2)); // Keep output rect within crop


      if (_top < crop.top) {
        _top = crop.top;
      } else if (_top + _height > crop.top + crop.height) {
        _top = crop.top + crop.height - _height;
      }

      cropRect = {
        left: _left,
        top: _top,
        width: _width,
        height: _height
      };
    }

    return {
      width: imgWidth,
      height: imgHeight,
      rect: cropRect
    };
  } // For backwards-compatibility

  var validFits = ['clip', 'crop', 'fill', 'fillmax', 'max', 'scale', 'min'];
  var validCrops = ['top', 'bottom', 'left', 'right', 'center', 'focalpoint', 'entropy'];
  var validAutoModes = ['format'];

  function isSanityModernClientLike(client) {
    return client && 'config' in client ? typeof client.config === 'function' : false;
  }

  function isSanityClientLike(client) {
    return client && 'clientConfig' in client ? typeof client.clientConfig === 'object' : false;
  }

  function rewriteSpecName(key) {
    var specs = SPEC_NAME_TO_URL_NAME_MAPPINGS;

    for (var _iterator = _createForOfIteratorHelperLoose(specs), _step; !(_step = _iterator()).done;) {
      var entry = _step.value;
      var specName = entry[0],
          param = entry[1];

      if (key === specName || key === param) {
        return specName;
      }
    }

    return key;
  }

  function urlBuilder(options) {
    // Did we get a modernish client?
    if (isSanityModernClientLike(options)) {
      // Inherit config from client
      var _options$config = options.config(),
          apiUrl = _options$config.apiHost,
          projectId = _options$config.projectId,
          dataset = _options$config.dataset;

      var apiHost = apiUrl || 'https://api.sanity.io';
      return new ImageUrlBuilder(null, {
        baseUrl: apiHost.replace(/^https:\/\/api\./, 'https://cdn.'),
        projectId: projectId,
        dataset: dataset
      });
    } // Did we get a SanityClient?


    var client = options;

    if (isSanityClientLike(client)) {
      // Inherit config from client
      var _client$clientConfig = client.clientConfig,
          _apiUrl = _client$clientConfig.apiHost,
          _projectId = _client$clientConfig.projectId,
          _dataset = _client$clientConfig.dataset;

      var _apiHost = _apiUrl || 'https://api.sanity.io';

      return new ImageUrlBuilder(null, {
        baseUrl: _apiHost.replace(/^https:\/\/api\./, 'https://cdn.'),
        projectId: _projectId,
        dataset: _dataset
      });
    } // Or just accept the options as given


    return new ImageUrlBuilder(null, options);
  }
  var ImageUrlBuilder = /*#__PURE__*/function () {
    function ImageUrlBuilder(parent, options) {
      this.options = void 0;
      this.options = parent ? _extends({}, parent.options || {}, options || {}) // Merge parent options
      : _extends({}, options || {}); // Copy options
    }

    var _proto = ImageUrlBuilder.prototype;

    _proto.withOptions = function withOptions(options) {
      var baseUrl = options.baseUrl || this.options.baseUrl;
      var newOptions = {
        baseUrl: baseUrl
      };

      for (var key in options) {
        if (options.hasOwnProperty(key)) {
          var specKey = rewriteSpecName(key);
          newOptions[specKey] = options[key];
        }
      }

      return new ImageUrlBuilder(this, _extends({
        baseUrl: baseUrl
      }, newOptions));
    } // The image to be represented. Accepts a Sanity 'image'-document, 'asset'-document or
    // _id of asset. To get the benefit of automatic hot-spot/crop integration with the content
    // studio, the 'image'-document must be provided.
    ;

    _proto.image = function image(source) {
      return this.withOptions({
        source: source
      });
    } // Specify the dataset
    ;

    _proto.dataset = function dataset(_dataset2) {
      return this.withOptions({
        dataset: _dataset2
      });
    } // Specify the projectId
    ;

    _proto.projectId = function projectId(_projectId2) {
      return this.withOptions({
        projectId: _projectId2
      });
    } // Specify background color
    ;

    _proto.bg = function bg(_bg) {
      return this.withOptions({
        bg: _bg
      });
    } // Set DPR scaling factor
    ;

    _proto.dpr = function dpr(_dpr) {
      // A DPR of 1 is the default - so only include it if we have a different value
      return this.withOptions(_dpr && _dpr !== 1 ? {
        dpr: _dpr
      } : {});
    } // Specify the width of the image in pixels
    ;

    _proto.width = function width(_width) {
      return this.withOptions({
        width: _width
      });
    } // Specify the height of the image in pixels
    ;

    _proto.height = function height(_height) {
      return this.withOptions({
        height: _height
      });
    } // Specify focal point in fraction of image dimensions. Each component 0.0-1.0
    ;

    _proto.focalPoint = function focalPoint(x, y) {
      return this.withOptions({
        focalPoint: {
          x: x,
          y: y
        }
      });
    };

    _proto.maxWidth = function maxWidth(_maxWidth) {
      return this.withOptions({
        maxWidth: _maxWidth
      });
    };

    _proto.minWidth = function minWidth(_minWidth) {
      return this.withOptions({
        minWidth: _minWidth
      });
    };

    _proto.maxHeight = function maxHeight(_maxHeight) {
      return this.withOptions({
        maxHeight: _maxHeight
      });
    };

    _proto.minHeight = function minHeight(_minHeight) {
      return this.withOptions({
        minHeight: _minHeight
      });
    } // Specify width and height in pixels
    ;

    _proto.size = function size(width, height) {
      return this.withOptions({
        width: width,
        height: height
      });
    } // Specify blur between 0 and 100
    ;

    _proto.blur = function blur(_blur) {
      return this.withOptions({
        blur: _blur
      });
    };

    _proto.sharpen = function sharpen(_sharpen) {
      return this.withOptions({
        sharpen: _sharpen
      });
    } // Specify the desired rectangle of the image
    ;

    _proto.rect = function rect(left, top, width, height) {
      return this.withOptions({
        rect: {
          left: left,
          top: top,
          width: width,
          height: height
        }
      });
    } // Specify the image format of the image. 'jpg', 'pjpg', 'png', 'webp'
    ;

    _proto.format = function format(_format) {
      return this.withOptions({
        format: _format
      });
    };

    _proto.invert = function invert(_invert) {
      return this.withOptions({
        invert: _invert
      });
    } // Rotation in degrees 0, 90, 180, 270
    ;

    _proto.orientation = function orientation(_orientation) {
      return this.withOptions({
        orientation: _orientation
      });
    } // Compression quality 0-100
    ;

    _proto.quality = function quality(_quality) {
      return this.withOptions({
        quality: _quality
      });
    } // Make it a download link. Parameter is default filename.
    ;

    _proto.forceDownload = function forceDownload(download) {
      return this.withOptions({
        download: download
      });
    } // Flip image horizontally
    ;

    _proto.flipHorizontal = function flipHorizontal() {
      return this.withOptions({
        flipHorizontal: true
      });
    } // Flip image vertically
    ;

    _proto.flipVertical = function flipVertical() {
      return this.withOptions({
        flipVertical: true
      });
    } // Ignore crop/hotspot from image record, even when present
    ;

    _proto.ignoreImageParams = function ignoreImageParams() {
      return this.withOptions({
        ignoreImageParams: true
      });
    };

    _proto.fit = function fit(value) {
      if (validFits.indexOf(value) === -1) {
        throw new Error("Invalid fit mode \"" + value + "\"");
      }

      return this.withOptions({
        fit: value
      });
    };

    _proto.crop = function crop(value) {
      if (validCrops.indexOf(value) === -1) {
        throw new Error("Invalid crop mode \"" + value + "\"");
      }

      return this.withOptions({
        crop: value
      });
    } // Saturation
    ;

    _proto.saturation = function saturation(_saturation) {
      return this.withOptions({
        saturation: _saturation
      });
    };

    _proto.auto = function auto(value) {
      if (validAutoModes.indexOf(value) === -1) {
        throw new Error("Invalid auto mode \"" + value + "\"");
      }

      return this.withOptions({
        auto: value
      });
    } // Specify the number of pixels to pad the image
    ;

    _proto.pad = function pad(_pad) {
      return this.withOptions({
        pad: _pad
      });
    } // Gets the url based on the submitted parameters
    ;

    _proto.url = function url() {
      return urlForImage(this.options);
    } // Alias for url()
    ;

    _proto.toString = function toString() {
      return this.url();
    };

    return ImageUrlBuilder;
  }();

  return urlBuilder;

}));
//# sourceMappingURL=image-url.umd.js.map