The book parameter is only needed while fetching quotes.
In case the user passes one or more commodities to process
the book can be readily derived from the commodity/commodities.
In the other case (fetch all quotes) the user now is
required to pass a book to the call.
This code will convert the json data into GncPrice objects and add them
to the pricedb, effectively doing what price-quotes.scm does.
A few notable remarks:
- still requires plenty of cleaning up. This is the first proof of concept
- like the original scm based code, this parser completely ignores timezone
information. As it wasn't used before and nobody complained, it may not
be that important. Or it can be implemented later.
- price-quotes.scm would first check if a price already existed in the pricedb
and try to update that one instead of adding one (only if the old price's
type is inferior). However that is redundant as gnc_pricedb_add_price does
the same check. So I have omitted this extra check from GncQuotes.
- currency quotes can be inverted. I have slightly changed the way to handle
this. The perl wrapper code will simply set an "inverted" flag in that case,
but will otherwise not swap currency and commodity as it used to be the case.
On parsing, the inversion flag will cause the GncNumeric that's parsed from
the price to be inverted. As it's still a GncNumeric that shouldn't result
in any loss of precision, while keeping prices in the db always in the default
currency.
That allows the private implementation to pass a number of variables
based on various boost libraries. It's better to not have them in
the public interface to keep compilation times down.
For all but the basic check a book is required. Might
as well be able to pass it directly and store a reference
to it. That will simplify member function declarations.
I have been reading on singleton implementations and there appears
to be a lot of pushback against those.
We can revisit this if it turns out performance degrades
significantly by running the F::Q check multiple times.
This rewritten version takes JSON input and spits out JSON.
Additionally inverted currency quotes will only be flagged.
The old code also swapped currencies in the result.
GncQuotes will be written towards these new implementation
choices.
At the same time do an explicit reinstantiation of quotes_cached at first use
to work around what seems to be a race condition between static instantiation
and binreloc.
This library intends to wrap Finance::Quote the way price-quotes.scm currently does.
In this first commit the library replaces price-quotes.scm's library to install
quote sources. In addition it exposes a new command line parameter in gnucash-cli
to show which version of Finance::Quote is installed on the system (if any) and
which quotes sources that verions exposes.
Instead of using static_assert. This prevents the compiler from even
trying and avoids weird compilation errors when testing types for
instantiating other templates.
The compiler complains that there's no matching
gnc_register_number_range_option for GncOptionDB*, which without this
commit is true because the explicit templates are for GncOptionDBPtr&.
Note that the original template definition is for GncOptionDB* and
that the header-defined inlines that take GncOptionDBPtr& call the
GncOptionDB* version.
Instead of using static_assert. This prevents the compiler from even
trying and avoids weird compilation errors when testing types for
instantiating other templates.
The compiler complains that there's no matching
gnc_register_number_range_option for GncOptionDB*, which without this
commit is true because the explicit templates are for GncOptionDBPtr&.
Note that the original template definition is for GncOptionDB* and
that the header-defined inlines that take GncOptionDBPtr& call the
GncOptionDB* version.
