tame/core/datetime.xml

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<?xml version="1.0" encoding="ISO-8859-1"?>
<package xmlns="http://www.lovullo.com/rater"
xmlns:c="http://www.lovullo.com/calc"
core="true"
desc="Date and time">
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<import package="base" />
<!--
Determines how many years the given date is relative to the current date
Note that a positive number will be returned if the given date is in the past,
negative if in the future.
-->
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<template name="_ageYears_" desc="Age in years of the given date relative to the current">
<param name="@generates@" desc="Generator variable, per index" />
<param name="@yearset@" desc="Set of years to iterate on" />
<param name="@sym@" desc="Generator symbol" />
<param name="@when@" desc="Only when this boolean value is true" />
<param name="@default@" desc="Default age when yearset values are empty" />
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<param name="@yields@" desc="Variable to yield into">
<text>_</text>
<param-value name="@generates@" />
</param>
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<rate yields="@yields@">
<c:sum of="@yearset@" index="k" generates="@generates@" desc="Relative age" sym="@sym@">
<c:cases>
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<if name="@when@">
<c:case>
<c:when name="@when@" index="k">
<c:eq>
<c:value-of name="FALSE" />
</c:eq>
</c:when>
<!-- return a default, or 0 if no default is provided -->
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<if name="@default@">
<c:value-of name="@default@" index="k" />
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</if>
<unless name="@default@">
<c:const value="0" type="integer" desc="Condition not met, but no default" />
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</unless>
</c:case>
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</if>
<!-- if no @when@, then we'll always do this -->
<c:otherwise>
<c:cases>
<c:case>
<c:when name="@yearset@" index="k">
<c:gt>
<c:const value="0" type="integer" desc="Only calculate difference if a value is available" />
</c:gt>
</c:when>
<c:sum label="Calculate by subtracting the given year from the current year">
<c:value-of name="__DATE_YEAR__" />
<c:product>
<c:value-of name="NEGATE" />
<c:value-of name="@yearset@" index="k" />
</c:product>
</c:sum>
</c:case>
<!-- we don't have a value; just use the default age we were given -->
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<if name="@default@">
<c:otherwise>
<c:value-of name="@default@" index="k" />
</c:otherwise>
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</if>
</c:cases>
</c:otherwise>
</c:cases>
</c:sum>
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</rate>
</template>
</package>