Libraries: Move to Userland/Libraries/

1 files changed, 242 insertions, 0 deletions

diff --git a/Userland/Libraries/LibCore/ConfigFile.cpp b/Userland/Libraries/LibCore/ConfigFile.cpp
new file mode 100644
index 0000000000..cb7e68576c
--- /dev/null
+++ b/Userland/Libraries/LibCore/ConfigFile.cpp
@@ -0,0 +1,242 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/ByteBuffer.h>
+#include <AK/StringBuilder.h>
+#include <LibCore/ConfigFile.h>
+#include <LibCore/File.h>
+#include <LibCore/StandardPaths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <unistd.h>
+
+namespace Core {
+
+NonnullRefPtr<ConfigFile> ConfigFile::get_for_lib(const String& lib_name)
+{
+    String directory = StandardPaths::config_directory();
+    auto path = String::formatted("{}/lib/{}.ini", directory, lib_name);
+
+    return adopt(*new ConfigFile(path));
+}
+
+NonnullRefPtr<ConfigFile> ConfigFile::get_for_app(const String& app_name)
+{
+    String directory = StandardPaths::config_directory();
+    auto path = String::formatted("{}/{}.ini", directory, app_name);
+    return adopt(*new ConfigFile(path));
+}
+
+NonnullRefPtr<ConfigFile> ConfigFile::get_for_system(const String& app_name)
+{
+    auto path = String::formatted("/etc/{}.ini", app_name);
+    return adopt(*new ConfigFile(path));
+}
+
+NonnullRefPtr<ConfigFile> ConfigFile::open(const String& path)
+{
+    return adopt(*new ConfigFile(path));
+}
+
+ConfigFile::ConfigFile(const String& file_name)
+    : m_file_name(file_name)
+{
+    reparse();
+}
+
+ConfigFile::~ConfigFile()
+{
+    sync();
+}
+
+void ConfigFile::reparse()
+{
+    m_groups.clear();
+
+    auto file = File::construct(m_file_name);
+    if (!file->open(IODevice::OpenMode::ReadOnly))
+        return;
+
+    HashMap<String, String>* current_group = nullptr;
+
+    while (file->can_read_line()) {
+        auto line = file->read_line();
+        auto* cp = line.characters();
+
+        while (*cp && (*cp == ' ' || *cp == '\t' || *cp == '\n'))
+            ++cp;
+
+        switch (*cp) {
+        case '\0': // EOL...
+        case '#':  // Comment, skip entire line.
+        case ';':  // -||-
+            continue;
+        case '[': { // Start of new group.
+            StringBuilder builder;
+            ++cp; // Skip the '['
+            while (*cp && (*cp != ']'))
+                builder.append(*(cp++));
+            current_group = &m_groups.ensure(builder.to_string());
+            break;
+        }
+        default: { // Start of key{
+            StringBuilder key_builder;
+            StringBuilder value_builder;
+            while (*cp && (*cp != '='))
+                key_builder.append(*(cp++));
+            ++cp; // Skip the '='
+            while (*cp && (*cp != '\n'))
+                value_builder.append(*(cp++));
+            if (!current_group) {
+                // We're not in a group yet, create one with the name ""...
+                current_group = &m_groups.ensure("");
+            }
+            current_group->set(key_builder.to_string(), value_builder.to_string());
+        }
+        }
+    }
+}
+
+String ConfigFile::read_entry(const String& group, const String& key, const String& default_value) const
+{
+    if (!has_key(group, key)) {
+        return default_value;
+    }
+    auto it = m_groups.find(group);
+    auto jt = it->value.find(key);
+    return jt->value;
+}
+
+int ConfigFile::read_num_entry(const String& group, const String& key, int default_value) const
+{
+    if (!has_key(group, key)) {
+        return default_value;
+    }
+
+    return read_entry(group, key).to_int().value_or(default_value);
+}
+
+bool ConfigFile::read_bool_entry(const String& group, const String& key, bool default_value) const
+{
+    auto value = read_entry(group, key, default_value ? "1" : "0");
+    if (value == "1" || value.to_lowercase() == "true")
+        return 1;
+    return 0;
+}
+
+void ConfigFile::write_entry(const String& group, const String& key, const String& value)
+{
+    m_groups.ensure(group).ensure(key) = value;
+    m_dirty = true;
+}
+
+void ConfigFile::write_num_entry(const String& group, const String& key, int value)
+{
+    write_entry(group, key, String::number(value));
+}
+void ConfigFile::write_bool_entry(const String& group, const String& key, bool value)
+{
+    write_entry(group, key, value ? "1" : "0");
+}
+void ConfigFile::write_color_entry(const String& group, const String& key, Color value)
+{
+    write_entry(group, key, String::formatted("{},{},{},{}", value.red(), value.green(), value.blue(), value.alpha()));
+}
+
+bool ConfigFile::sync()
+{
+    if (!m_dirty)
+        return true;
+
+    FILE* fp = fopen(m_file_name.characters(), "wb");
+    if (!fp)
+        return false;
+
+    for (auto& it : m_groups) {
+        outln(fp, "[{}]", it.key);
+        for (auto& jt : it.value)
+            outln(fp, "{}={}", jt.key, jt.value);
+        outln(fp);
+    }
+
+    fclose(fp);
+
+    m_dirty = false;
+    return true;
+}
+
+void ConfigFile::dump() const
+{
+    for (auto& it : m_groups) {
+        outln("[{}]", it.key);
+        for (auto& jt : it.value)
+            outln("{}={}", jt.key, jt.value);
+        outln();
+    }
+}
+
+Vector<String> ConfigFile::groups() const
+{
+    return m_groups.keys();
+}
+
+Vector<String> ConfigFile::keys(const String& group) const
+{
+    auto it = m_groups.find(group);
+    if (it == m_groups.end())
+        return {};
+    return it->value.keys();
+}
+
+bool ConfigFile::has_key(const String& group, const String& key) const
+{
+    auto it = m_groups.find(group);
+    if (it == m_groups.end())
+        return {};
+    return it->value.contains(key);
+}
+
+bool ConfigFile::has_group(const String& group) const
+{
+    return m_groups.contains(group);
+}
+
+void ConfigFile::remove_group(const String& group)
+{
+    m_groups.remove(group);
+    m_dirty = true;
+}
+
+void ConfigFile::remove_entry(const String& group, const String& key)
+{
+    auto it = m_groups.find(group);
+    if (it == m_groups.end())
+        return;
+    it->value.remove(key);
+    m_dirty = true;
+}
+
+}