| 1 | '''csml utils contains useful utility functions''' |
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| 2 | import csml |
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| 3 | |
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| 4 | def listify(item): |
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| 5 | ''' listify checks if an item is a list, if it isn't it puts it inside a list and returns it. Always returns a list object''' |
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| 6 | if type(item) is list: |
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| 7 | return item |
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| 8 | else: |
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| 9 | return [item] |
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| 10 | |
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| 11 | |
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| 12 | |
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| 13 | #deal with longitude requests |
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| 14 | #if the request is in -ve,+ve eg (-30,30) but the data is in (0,360) need to handle this by changing the args. |
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| 15 | def fixLongitude(request, kwargs): |
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| 16 | def _anyitemlessthanzero(listofitems): |
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| 17 | for item in listofitems: |
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| 18 | if item <0: |
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| 19 | return True |
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| 20 | return False |
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| 21 | for key in request.keys(): |
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| 22 | if kwargs.has_key(key): |
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| 23 | if type(kwargs[key]) is not tuple: |
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| 24 | continue |
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| 25 | elif key == 'longitude': #how do we test if it is longitude properly? |
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| 26 | if _anyitemlessthanzero(request[key]): |
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| 27 | pass #no need to convert request if data is also -ve to +ve |
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| 28 | else: |
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| 29 | for val in request[key]: |
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| 30 | if val < 0: |
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| 31 | pass |
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| 32 | else: |
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| 33 | if kwargs[key][0] < 0: |
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| 34 | kwargs[key]=(kwargs[key][0]+360,kwargs[key][1]) |
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| 35 | if kwargs[key][1] < 0: |
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| 36 | kwargs[key]=(kwargs[key][0],kwargs[key][1]+360) |
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| 37 | return kwargs |
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| 38 | |
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| 39 | |
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| 40 | |
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| 41 | def nudgeSingleValuesToAxisValues(value, axisValues): |
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| 42 | """ |
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| 43 | Takes a value and checks if it is in the axisValues array. If not, it nudges the |
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| 44 | value to the nearest neighbour in axis. It returns the new value twice along |
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| 45 | with a message describing the change. |
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| 46 | """ |
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| 47 | |
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| 48 | rtMessage="" |
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| 49 | newValue=None |
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| 50 | |
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| 51 | def __fixTimes(value, axisValues): |
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| 52 | newValue = csml.csmllibs.csmltime.getTimeAsValue(value) |
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| 53 | newAxisValues=[] |
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| 54 | for ax in axisValues: |
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| 55 | newAxisValues.append(csml.csmllibs.csmltime.getTimeAsValue(ax)) |
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| 56 | return newValue, newAxisValues |
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| 57 | |
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| 58 | if value in axisValues: |
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| 59 | newValue=value |
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| 60 | else: |
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| 61 | if str(value).find('T') != -1: |
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| 62 | value, axisValues=__fixTimes(value,axisValues) |
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| 63 | sortedAxis=[] |
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| 64 | for i in axisValues: |
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| 65 | sortedAxis.append(i) |
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| 66 | sortedAxis.sort() |
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| 67 | if value<sortedAxis[0]: |
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| 68 | newValue=sortedAxis[0] |
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| 69 | elif value>sortedAxis[-1]: |
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| 70 | newValue=sortedAxis[-1] |
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| 71 | else: |
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| 72 | for i in range(len(axisValues)): |
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| 73 | if i<(len(axisValues)-1): |
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| 74 | (current, nextone)=(axisValues[i], axisValues[i+1]) |
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| 75 | if current>nextone: |
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| 76 | tempc=nextone |
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| 77 | nextone=current |
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| 78 | current=tempc |
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| 79 | if value>current and value<nextone: |
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| 80 | lowergap=value-current |
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| 81 | uppergap=nextone-value |
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| 82 | if uppergap==lowergap: |
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| 83 | newValue=nextone |
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| 84 | elif uppergap>lowergap: |
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| 85 | newValue=current |
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| 86 | elif uppergap<lowergap: |
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| 87 | newValue=nextone |
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| 88 | break |
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| 89 | if newValue==None: |
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| 90 | axisType='unknown' |
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| 91 | rtMessage="%s axis selected value '%s' nudged to nearest value in real axis '%s' ;" % (axisType, value, newValue) |
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| 92 | # print rtMessag |
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| 93 | if type(newValue) is float: |
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| 94 | if len(str(int(newValue))) ==14: # it's a time |
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| 95 | newValue=csml.csmllibs.csmltime.convertValueToCSML(newValue) |
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| 96 | return (newValue) |
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