diff options
Diffstat (limited to 'sca-cpp/trunk/components/filedb/filedb.cpp')
-rw-r--r-- | sca-cpp/trunk/components/filedb/filedb.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sca-cpp/trunk/components/filedb/filedb.cpp b/sca-cpp/trunk/components/filedb/filedb.cpp index 37cb6c5260..b28cc9bedb 100644 --- a/sca-cpp/trunk/components/filedb/filedb.cpp +++ b/sca-cpp/trunk/components/filedb/filedb.cpp @@ -63,6 +63,39 @@ const failable<value> put(const list<value>& params, const filedb::FileDB& db) { } /** + * Patch an item in the database. + */ +const failable<value> patch(const list<value>& params, const filedb::FileDB& db) { + // Read patch + value p = assoc<value>("patch", assoc<value>("content", car<value>(cadr(params)))); + if (isNil(p)) + return mkfailure<value>("Couldn't read patch script"); + const string script = cadr<value>(p); + debug(script, "filedb::patch::script"); + istringstream is(script); + + // Get existing value from database + const failable<value> ival = filedb::get(car(params), db); + if (!hasContent(ival) && rcode(ival) != 404) + return mkfailure<value>(ival); + + // Apply patch + scheme::Env env = scheme::setupEnvironment(); + const value pval = scheme::evalScript(cons<value>("patch", scheme::quotedParameters(mklist<value>(car(params), hasContent(ival)? content(ival) : (value)list<value>()))), is, env); + if (isNil(pval)) { + ostringstream os; + os << "Couldn't patch file database entry: " << car(params); + return mkfailure<value>(str(os), 404, false); + } + + // Push patched value to database + const failable<bool> val = filedb::patch(car(params), pval, db); + if (!hasContent(val)) + return mkfailure<value>(val); + return value(content(val)); +} + +/** * Delete an item from the database. */ const failable<value> del(const list<value>& params, const filedb::FileDB& db) { @@ -91,6 +124,8 @@ const failable<value> start(const list<value>& params) { return post(cdr(params), db); if (func == "put") return put(cdr(params), db); + if (func == "patch") + return patch(cdr(params), db); if (func == "delete") return del(cdr(params), db); return mkfailure<value>(); |