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| 1 | +/*******************************************************************\ |
| 2 | +
|
| 3 | +Module: JSON Commandline Interface |
| 4 | +
|
| 5 | +Author: Peter Schrammel |
| 6 | +
|
| 7 | +\*******************************************************************/ |
| 8 | + |
| 9 | +/// \file |
| 10 | +/// JSON Commandline Interface |
| 11 | + |
| 12 | +#include "json_interface.h" |
| 13 | + |
| 14 | +#include <util/cmdline.h> |
| 15 | +#include <util/exception_utils.h> |
| 16 | +#include <util/json.h> |
| 17 | +#include <util/message.h> |
| 18 | + |
| 19 | +#include "json_parser.h" |
| 20 | + |
| 21 | +#include <iostream> |
| 22 | + |
| 23 | +/// Parse commandline options from \p json into \p cmdline |
| 24 | +static void get_json_options(const json_objectt &json, cmdlinet &cmdline) |
| 25 | +{ |
| 26 | + const jsont &arguments = json["arguments"]; |
| 27 | + if(!arguments.is_array()) |
| 28 | + { |
| 29 | + throw invalid_command_line_argument_exceptiont( |
| 30 | + "array expected", "'arguments'"); |
| 31 | + } |
| 32 | + |
| 33 | + for(const auto &argument : to_json_array(arguments)) |
| 34 | + { |
| 35 | + if(!argument.is_string()) |
| 36 | + { |
| 37 | + throw invalid_command_line_argument_exceptiont( |
| 38 | + "string expected", "argument"); |
| 39 | + } |
| 40 | + |
| 41 | + cmdline.args.push_back(argument.value); |
| 42 | + } |
| 43 | + |
| 44 | + const jsont &options = json["options"]; |
| 45 | + if(!options.is_object()) |
| 46 | + { |
| 47 | + throw invalid_command_line_argument_exceptiont( |
| 48 | + "array expected", "'options'"); |
| 49 | + } |
| 50 | + |
| 51 | + for(const auto &option_pair : to_json_object(options)) |
| 52 | + { |
| 53 | + if(option_pair.second.is_string() || option_pair.second.is_number()) |
| 54 | + { |
| 55 | + // e.g. --option x |
| 56 | + cmdline.set(option_pair.first, option_pair.second.value); |
| 57 | + } |
| 58 | + else if(option_pair.second.is_boolean()) |
| 59 | + { |
| 60 | + // e.g. --flag |
| 61 | + if(option_pair.second.is_true()) |
| 62 | + cmdline.set(option_pair.first); |
| 63 | + } |
| 64 | + else if(option_pair.second.is_array()) |
| 65 | + { |
| 66 | + // e.g. --option x --option y |
| 67 | + for(const auto &element : to_json_array(option_pair.second)) |
| 68 | + { |
| 69 | + if(element.is_string()) |
| 70 | + cmdline.set(option_pair.first, element.value); |
| 71 | + else |
| 72 | + { |
| 73 | + throw invalid_command_line_argument_exceptiont( |
| 74 | + "string expected", option_pair.first); |
| 75 | + } |
| 76 | + } |
| 77 | + } |
| 78 | + else |
| 79 | + { |
| 80 | + throw invalid_command_line_argument_exceptiont( |
| 81 | + "unrecognized commandline option format", |
| 82 | + option_pair.first, |
| 83 | + "Boolean, string, number, or string array expected"); |
| 84 | + } |
| 85 | + } |
| 86 | +} |
| 87 | + |
| 88 | +void json_interface(cmdlinet &cmdline, message_handlert &message_handler) |
| 89 | +{ |
| 90 | + if(cmdline.isset("json-interface")) |
| 91 | + { |
| 92 | + jsont json; |
| 93 | + |
| 94 | + parse_json(std::cin, "", message_handler, json); |
| 95 | + |
| 96 | + try |
| 97 | + { |
| 98 | + if(!json.is_object()) |
| 99 | + { |
| 100 | + throw invalid_command_line_argument_exceptiont( |
| 101 | + "JSON object expected at top-level", "command-line JSON input"); |
| 102 | + } |
| 103 | + |
| 104 | + get_json_options(to_json_object(json), cmdline); |
| 105 | + |
| 106 | + // Add this so that it gets propagated into optionst; |
| 107 | + // the ui_message_handlert::uit has already been set on the basis |
| 108 | + // of the json-interface flag. |
| 109 | + cmdline.set("json-ui"); |
| 110 | + } |
| 111 | + catch(const invalid_command_line_argument_exceptiont &e) |
| 112 | + { |
| 113 | + messaget log(message_handler); |
| 114 | + log.error() << e.what() << messaget::eom; |
| 115 | + |
| 116 | + // make sure we fail with a usage error |
| 117 | + cmdline.clear(); |
| 118 | + } |
| 119 | + } |
| 120 | +} |
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