# All files / src image.ts

56.57% Statements 56/99
42.55% Branches 40/94
57.14% Functions 4/7
57.73% Lines 56/97

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     import { request } from './utils'
    import { urlSafeBase64Encode } from './base64'

    export interface ImageViewOptions {
      mode: number
      format?: string
      w?: number
      h?: number
      q?: number
    }

    export interface ImageWatermark {
      image: string
      mode: number
      fontsize?: number
      dissolve?: number
      dx?: number
      dy?: number
      gravity?: string
      text?: string
      font?: string
      fill?: string
    }

    export interface ImageMogr2 {
      'auto-orient'?: boolean
      strip?: boolean
      thumbnail?: number
      crop?: number
      gravity?: number
      format?: number
      blur?: number
      quality?: number
      rotate?: number
    }

    type Pipeline =
      | (ImageWatermark & { fop: 'watermark' })
      | (ImageViewOptions & { fop: 'imageView2' })
      | (ImageMogr2 & { fop: 'imageMogr2' })

    export interface Entry {
      domain: string
      key: string
    }

    function getImageUrl(key: string, domain: string) {
      key = encodeURIComponent(key)
      Eif (domain.slice(domain.length - 1) !== '/') {
        domain += '/'
      }

      return domain + key
    }

    export function imageView2(op: ImageViewOptions, key?: string, domain?: string) {
      Iif (!/^\d$/.test(String(op.mode))) {
        throw 'mode should be number in imageView2'
      }

      const { mode, w, h, q, format } = op

      Iif (!w && !h) {
        throw 'param w and h is empty in imageView2'
      }

      let imageUrl = 'imageView2/' + encodeURIComponent(mode)
      imageUrl += w ? '/w/' + encodeURIComponent(w) : ''
      imageUrl += h ? '/h/' + encodeURIComponent(h) : ''
      imageUrl += q ? '/q/' + encodeURIComponent(q) : ''
      imageUrl += format ? '/format/' + encodeURIComponent(format) : ''
      Eif (key && domain) {
        imageUrl = getImageUrl(key, domain) + '?' + imageUrl
      }
      return imageUrl
    }

    // invoke the imageMogr2 api of Qiniu
    export function imageMogr2(op: ImageMogr2, key?: string, domain?: string) {
      const autoOrient = op['auto-orient']
      const { thumbnail, strip, gravity, crop, quality, rotate, format, blur } = op

      let imageUrl = 'imageMogr2'

      imageUrl += autoOrient ? '/auto-orient' : ''
      imageUrl += thumbnail ? '/thumbnail/' + encodeURIComponent(thumbnail) : ''
      imageUrl += strip ? '/strip' : ''
      imageUrl += gravity ? '/gravity/' + encodeURIComponent(gravity) : ''
      imageUrl += quality ? '/quality/' + encodeURIComponent(quality) : ''
      imageUrl += crop ? '/crop/' + encodeURIComponent(crop) : ''
      imageUrl += rotate ? '/rotate/' + encodeURIComponent(rotate) : ''
      imageUrl += format ? '/format/' + encodeURIComponent(format) : ''
      imageUrl += blur ? '/blur/' + encodeURIComponent(blur) : ''
      Eif (key && domain) {
        imageUrl = getImageUrl(key, domain) + '?' + imageUrl
      }
      return imageUrl
    }

    // invoke the watermark api of Qiniu
    export function watermark(op: ImageWatermark, key?: string, domain?: string) {
      const mode = op.mode
      Iif (!mode) {
        throw "mode can't be empty in watermark"
      }

      let imageUrl = 'watermark/' + mode
      if (mode !== 1 && mode !== 2) {
        throw 'mode is wrong'
      }

      Eif (mode === 1) {
        const image = op.image
        Iif (!image) {
          throw "image can't be empty in watermark"
        }
        imageUrl += image ? '/image/' + urlSafeBase64Encode(image) : ''
      }

      Iif (mode === 2) {
        const { text, font, fontsize, fill } = op
        if (!text) {
          throw "text can't be empty in watermark"
        }
        imageUrl += text ? '/text/' + urlSafeBase64Encode(text) : ''
        imageUrl += font ? '/font/' + urlSafeBase64Encode(font) : ''
        imageUrl += fontsize ? '/fontsize/' + fontsize : ''
        imageUrl += fill ? '/fill/' + urlSafeBase64Encode(fill) : ''
      }

      const { dissolve, gravity, dx, dy } = op

      imageUrl += dissolve ? '/dissolve/' + encodeURIComponent(dissolve) : ''
      imageUrl += gravity ? '/gravity/' + encodeURIComponent(gravity) : ''
      imageUrl += dx ? '/dx/' + encodeURIComponent(dx) : ''
      imageUrl += dy ? '/dy/' + encodeURIComponent(dy) : ''
      Eif (key && domain) {
        imageUrl = getImageUrl(key, domain) + '?' + imageUrl
      }
      return imageUrl
    }

    // invoke the imageInfo api of Qiniu
    export function imageInfo(key: string, domain: string) {
      const url = getImageUrl(key, domain) + '?imageInfo'
      return request(url, { method: 'GET' })
    }

    // invoke the exif api of Qiniu
    export function exif(key: string, domain: string) {
      const url = getImageUrl(key, domain) + '?exif'
      return request(url, { method: 'GET' })
    }

    export function pipeline(arr: Pipeline[], key?: string, domain?: string) {
      const isArray = Object.prototype.toString.call(arr) === '[object Array]'
      let option: Pipeline
      let errOp = false
      let imageUrl = ''
      if (isArray) {
        for (let i = 0, len = arr.length; i < len; i++) {
          option = arr[i]
          if (!option.fop) {
            throw "fop can't be empty in pipeline"
          }
          switch (option.fop) {
            case 'watermark':
              imageUrl += watermark(option) + '|'
              break
            case 'imageView2':
              imageUrl += imageView2(option) + '|'
              break
            case 'imageMogr2':
              imageUrl += imageMogr2(option) + '|'
              break
            default:
              errOp = true
              break
          }
          if (errOp) {
            throw 'fop is wrong in pipeline'
          }
        }

        if (key && domain) {
          imageUrl = getImageUrl(key, domain) + '?' + imageUrl
          const length = imageUrl.length
          if (imageUrl.slice(length - 1) === '|') {
            imageUrl = imageUrl.slice(0, length - 1)
          }
        }
        return imageUrl
      }

      throw "pipeline's first param should be array"
    }