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Conditional strings for Whiskers.

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This commit is contained in:
chriseth
2020-04-27 11:07:56 +02:00
parent 61b1369fc2
commit aa8107f45a
4 changed files with 45 additions and 6 deletions
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libsolutil/Whiskers.cpp
+24 -6
View File
@@ -132,7 +132,11 @@ string Whiskers::replace(
map<string, vector<StringMap>> const& _listParameters
)
{
static regex listOrTag("<(" + paramRegex() + ")>|<#(" + paramRegex() + ")>((?:.|\\r|\\n)*?)</\\2>|<\\?(" + paramRegex() + ")>((?:.|\\r|\\n)*?)(<!\\4>((?:.|\\r|\\n)*?))?</\\4>");
static regex listOrTag(
"<(" + paramRegex() + ")>|"
"<#(" + paramRegex() + ")>((?:.|\\r|\\n)*?)</\\2>|"
"<\\?(\\+?" + paramRegex() + ")>((?:.|\\r|\\n)*?)(<!\\4>((?:.|\\r|\\n)*?))?</\\4>"
);
return regex_replace(_template, listOrTag, [&](match_results<string::const_iterator> _match) -> string
{
string tagName(_match[1]);
@@ -164,12 +168,26 @@ string Whiskers::replace(
else
{
assertThrow(!conditionName.empty(), WhiskersError, "");
assertThrow(
_conditions.count(conditionName),
WhiskersError, "Condition parameter " + conditionName + " not set."
);
bool conditionValue = false;
if (conditionName[0] == '+')
{
string tag = conditionName.substr(1);
assertThrow(
_parameters.count(tag),
WhiskersError, "Tag " + tag + " used as condition but was not set."
);
conditionValue = !_parameters.at(tag).empty();
}
else
{
assertThrow(
_conditions.count(conditionName),
WhiskersError, "Condition parameter " + conditionName + " not set."
);
conditionValue = _conditions.at(conditionName);
}
return replace(
_conditions.at(conditionName) ? _match[5] : _match[7],
conditionValue ? _match[5] : _match[7],
_parameters,
_conditions,
_listParameters
libsolutil/Whiskers.h
+3
View File
@@ -59,6 +59,9 @@ DEV_SIMPLE_EXCEPTION(WhiskersError);
* - Condition parameter: <?name>...<!name>...</name>, where "<!name>" is optional
* replaced (and recursively expanded) by the first part if the condition is true
* and by the second (or empty string if missing) if the condition is false
* - Conditional string parameter: <?+name>...<!+name>...</+name>
* Works similar to a conditional parameter where the checked condition is
* that the regular (string) parameter called "name" is non-empty.
* - List parameter: <#list>...</list>
* The part between the tags is repeated as often as values are provided
* in the mapping. Each list element can have its own parameter -> value mapping.