127 lines
4.5 KiB
XML
127 lines
4.5 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!--
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Copyright (C) 2015, 2017 R-T Specialty, LLC.
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This file is part of tame-core.
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tame-core is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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-->
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<package xmlns="http://www.lovullo.com/rater"
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xmlns:c="http://www.lovullo.com/calc"
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core="true"
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desc="Date and time">
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<import package="base" />
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Providing the current timestamp externally allows the system to be
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wholly deterministic.
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It also captures the state of the data in time,
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so re-calculating in the future (e.g. using the summary pages)
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will yield the same result.
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<param name="timestamp_current" type="integer" default="0"
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desc="Unix timestamp representing the current time of the
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system (clock time), as it should be perceived" />
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This system does not handle its own arthiemtic to figure out the
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current date components from the given timestamp.
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<param name="timestamp_year" type="integer" default="0"
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desc="Current year (clock time), as it should be perceived" />
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<param name="timestamp_month" type="integer" default="0"
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desc="Current month (clock time), as it should be perceived;
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1-indexed" />
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<param name="timestamp_day" type="integer" default="0"
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desc="Current day (clock time), as it should be perceived;
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1-indexed" />
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<!--
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Determines how many years the given date is relative to the current date
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Note that a positive number will be returned if the given date is
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in the past, negative if in the future.
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-->
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<template name="_age-years_" desc="Age in years of the given date relative to the current">
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<param name="@generates@" desc="Generator variable, per index" />
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<param name="@yearset@" desc="Set of years to iterate on" />
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<param name="@sym@" desc="Generator symbol" />
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<param name="@when@" desc="Only when this boolean value is true" />
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<param name="@default@" desc="Default age when yearset values are empty" />
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<param name="@yields@" desc="Variable to yield into">
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<text>_</text>
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<param-value name="@generates@" />
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</param>
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<rate yields="@yields@">
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<c:sum of="@yearset@" index="k" generates="@generates@" desc="Relative age" sym="@sym@">
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<c:cases>
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<if name="@when@">
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<c:case>
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<c:when name="@when@" index="k">
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<c:eq>
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<c:value-of name="FALSE" />
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</c:eq>
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</c:when>
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<!-- return a default, or 0 if no default is provided -->
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<if name="@default@">
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<c:value-of name="@default@" index="k" />
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</if>
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<unless name="@default@">
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<c:const value="0" type="integer" desc="Condition not met, but no default" />
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</unless>
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</c:case>
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</if>
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<!-- if no @when@, then we'll always do this -->
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<c:otherwise>
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<c:cases>
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<c:case>
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<c:when name="@yearset@" index="k">
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<c:gt>
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<c:const value="0" type="integer" desc="Only calculate difference if a value is available" />
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</c:gt>
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</c:when>
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<c:sum label="Calculate by subtracting the given year from the current year">
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<c:value-of name="timestamp_year" />
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<c:product>
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<c:value-of name="NEGATE" />
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<c:value-of name="@yearset@" index="k" />
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</c:product>
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</c:sum>
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</c:case>
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<!-- we don't have a value; just use the default age we were given -->
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<if name="@default@">
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<c:otherwise>
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<c:value-of name="@default@" index="k" />
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</c:otherwise>
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</if>
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</c:cases>
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</c:otherwise>
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</c:cases>
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</c:sum>
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</rate>
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</template>
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</package>
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