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67 lines
1.9 KiB
CoffeeScript
67 lines
1.9 KiB
CoffeeScript
angular.module("sideBySide").factory("transformer", () ->
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# Transform translations
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#
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# @param translations [Array] Translations with 'meta' and 'content' keys
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# @throw No poems or uneven number of verses
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# @return [Array] Translations transformed into row-based format
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return (translations) ->
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# Check whether all translations have same number of verses
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#
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# @param translations [array] Translations to check
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checkLengths = (translations) ->
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if translations.length < 1
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throw "No poems found!"
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lengths = []
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for translation in translations
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l = translation.content.length
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lengths[l] = 0 if l not of lengths
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lengths[l]++
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# return if all are same length
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return if _.size(_.compact(lengths)) <= 1
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uneven = (count + " of length " + length \
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for count,length in lengths \
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when typeof count isnt "undefined")
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details = []
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while _.size(_.compact(lengths)) > 1
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mindex = _.indexOf(lengths, _.min(lengths))
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maxdex = _.indexOf(lengths, _.max(lengths))
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# least occuring count is higher than most occuring count
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message = if mindex > maxdex \
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then "Superfluous verses: " \
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else "Missing verses after: "
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# get last verses of translations with mindex verses
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lastVerses = _.map(translations.filter((translation) ->
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return translation.content.length == mindex
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), (translation) ->
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return "'" + _.last(translation.content).text + "'"
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)
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details.push(message + lastVerses.join(", "))
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# remove least occuring from lengths
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delete lengths[mindex]
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throw "Poems with uneven number of verses: " +
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uneven.join(", ") + "." +
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" (" + details.join("; ") + ")."
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checkLengths(translations)
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data = {
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meta: (translation.meta for translation in translations)
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verses: []
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}
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# columns into rows and rows into columns
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for i in _.range(translations[0].content.length)
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data.verses.push(translation.content[i] \
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for translation in translations)
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return data
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)
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