Command: major code refactoring

ditto; and multi-command support was removed in favor of JSON config
support

src/modules/command/command.c

@@ -0,0 +1,85 @@
+#include "fastfetch.h"
+
+#include "common/printing.h"
+#include "common/processing.h"
+#include "modules/command/command.h"
+
+#define FF_COMMAND_MODULE_NAME "Command"
+
+void ffPrintCommand(FFinstance* instance, FFCommandOptions* options)
+{
+    FF_STRBUF_AUTO_DESTROY result;
+    ffStrbufInit(&result);
+    const char* error = ffProcessAppendStdOut(&result, (char* const[]){
+        options->shell.chars,
+        #ifdef _WIN32
+        "/c",
+        #else
+        "-c",
+        #endif
+        options->text.chars,
+        NULL
+    });
+
+    if(error)
+    {
+        ffPrintError(instance, FF_COMMAND_MODULE_NAME, 0, &options->moduleArgs, "%s", error);
+        return;
+    }
+
+    if(!result.length)
+    {
+        ffPrintError(instance, FF_COMMAND_MODULE_NAME, 0, &options->moduleArgs, "No result printed");
+        return;
+    }
+
+    ffPrintLogoAndKey(instance, FF_COMMAND_MODULE_NAME, 0, &options->moduleArgs.key);
+    ffStrbufPutTo(&result, stdout);
+}
+
+void ffInitCommandOptions(FFCommandOptions* options)
+{
+    options->moduleName = FF_COMMAND_MODULE_NAME;
+    ffOptionInitModuleArg(&options->moduleArgs);
+
+    ffStrbufInitS(&options->shell,
+        #ifdef _WIN32
+        "cmd"
+        #elif defined(__FreeBSD__)
+        "csh"
+        #else
+        "bash"
+        #endif
+    );
+
+    ffStrbufInit(&options->text);
+}
+
+bool ffParseCommandCommandOptions(FFCommandOptions* options, const char* key, const char* value)
+{
+    const char* subKey = ffOptionTestPrefix(key, FF_COMMAND_MODULE_NAME);
+    if (!subKey) return false;
+    if (ffOptionParseModuleArgs(key, subKey, value, &options->moduleArgs))
+        return true;
+
+    if(strcasecmp(subKey, "shell") == 0)
+    {
+        ffOptionParseString(key, value, &options->shell);
+        return true;
+    }
+
+    if(strcasecmp(subKey, "text") == 0)
+    {
+        ffOptionParseString(key, value, &options->text);
+        return true;
+    }
+
+    return false;
+}
+
+void ffDestroyCommandOptions(FFCommandOptions* options)
+{
+    ffOptionDestroyModuleArg(&options->moduleArgs);
+    ffStrbufDestroy(&options->shell);
+    ffStrbufDestroy(&options->text);
+}

src/modules/command/command.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "fastfetch.h"
+#include "modules/command/option.h"
+
+void ffPrintCommand(FFinstance* instance, FFCommandOptions* options);
+void ffInitCommandOptions(FFCommandOptions* options);
+bool ffParseCommandCommandOptions(FFCommandOptions* options, const char* key, const char* value);
+void ffDestroyCommandOptions(FFCommandOptions* options);

src/modules/command/option.h

@@ -0,0 +1,14 @@
+#pragma once
+
+// This file will be included in "fastfetch.h", do NOT put unnecessary things here
+
+#include "common/option.h"
+
+typedef struct FFCommandOptions
+{
+    const char* moduleName;
+    FFModuleArgs moduleArgs;
+
+    FFstrbuf shell;
+    FFstrbuf text;
+} FFCommandOptions;