Renamed mod to Cowlection

Bumped version to 1.8.9-0.7.0

4 files changed, 871 insertions, 0 deletions

diff --git a/src/main/java/eu/olli/cowlection/search/GuiDateField.java b/src/main/java/eu/olli/cowlection/search/GuiDateField.java
new file mode 100644
index 0000000..bb08a02
--- /dev/null
+++ b/src/main/java/eu/olli/cowlection/search/GuiDateField.java
@@ -0,0 +1,37 @@
+package eu.olli.cowlection.search;
+
+import net.minecraft.client.gui.FontRenderer;
+import net.minecraft.client.gui.GuiTextField;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeParseException;
+
+class GuiDateField extends GuiTextField {
+    GuiDateField(int componentId, FontRenderer fontrendererObj, int x, int y, int width, int height) {
+        super(componentId, fontrendererObj, x, y, width, height);
+    }
+
+    LocalDate getDate() {
+        try {
+            return LocalDate.parse(this.getText());
+        } catch (DateTimeParseException e) {
+            return LocalDate.now();
+        }
+    }
+
+    boolean validateDate() {
+        try {
+            LocalDate localDate = LocalDate.parse(this.getText());
+            if (localDate.isAfter(LocalDate.now()) || localDate.isBefore(LocalDate.ofYearDay(2009, 1))) {
+                // searching for things written in the future isn't possible (yet). It is also not possible to perform a search before the existence of mc.
+                setTextColor(0xFFFF3333);
+                return false;
+            }
+        } catch (DateTimeParseException e) {
+            setTextColor(0xFFFF3333);
+            return false;
+        }
+        setTextColor(0xFFFFFF);
+        return true;
+    }
+}
diff --git a/src/main/java/eu/olli/cowlection/search/GuiSearch.java b/src/main/java/eu/olli/cowlection/search/GuiSearch.java
new file mode 100644
index 0000000..d693e59
--- /dev/null
+++ b/src/main/java/eu/olli/cowlection/search/GuiSearch.java
@@ -0,0 +1,603 @@
+package eu.olli.cowlection.search;
+
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import com.mojang.realmsclient.util.Pair;
+import eu.olli.cowlection.Cowlection;
+import eu.olli.cowlection.config.MooConfig;
+import eu.olli.cowlection.data.LogEntry;
+import eu.olli.cowlection.util.Utils;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.*;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.renderer.Tessellator;
+import net.minecraft.util.ChatComponentText;
+import net.minecraft.util.EnumChatFormatting;
+import net.minecraft.util.IChatComponent;
+import net.minecraftforge.common.ForgeVersion;
+import net.minecraftforge.fml.client.GuiScrollingList;
+import net.minecraftforge.fml.client.config.GuiButtonExt;
+import net.minecraftforge.fml.client.config.GuiCheckBox;
+import net.minecraftforge.fml.client.config.GuiUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.exception.ExceptionUtils;
+import org.apache.commons.lang3.reflect.FieldUtils;
+import org.apache.commons.lang3.tuple.ImmutableTriple;
+import org.lwjgl.input.Keyboard;
+import org.lwjgl.opengl.GL11;
+
+import java.awt.*;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.lang.reflect.Field;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.stream.Collectors;
+import java.util.zip.GZIPInputStream;
+
+public class GuiSearch extends GuiScreen {
+    private static final String SEARCH_QUERY_PLACE_HOLDER = "Search for...";
+    private final File mcLogOutputFile;
+    /**
+     * @see Executors#newCachedThreadPool()
+     */
+    private final ExecutorService executorService = new ThreadPoolExecutor(0, 1,
+            60L, TimeUnit.SECONDS,
+            new LinkedBlockingQueue<>(), new ThreadFactoryBuilder().setNameFormat(Cowlection.MODID + "-logfilesearcher-%d").build());
+    // data
+    private String searchQuery;
+    private boolean chatOnly;
+    private boolean matchCase;
+    private boolean removeFormatting;
+    /**
+     * Cached results are required after resizing the client
+     */
+    private List<LogEntry> searchResults;
+    private LocalDate dateStart;
+    private LocalDate dateEnd;
+
+    // gui elements
+    private GuiButton buttonSearch;
+    private GuiButton buttonClose;
+    private GuiButton buttonHelp;
+    private GuiCheckBox checkboxChatOnly;
+    private GuiCheckBox checkboxMatchCase;
+    private GuiCheckBox checkboxRemoveFormatting;
+    private GuiTextField fieldSearchQuery;
+    private GuiDateField fieldDateStart;
+    private GuiDateField fieldDateEnd;
+    private SearchResults guiSearchResults;
+    private List<GuiTooltip> guiTooltips;
+    private boolean isSearchInProgress;
+    private String analyzedFiles;
+    private String analyzedFilesWithHits;
+    private boolean areEntriesSearchResults;
+
+    public GuiSearch(File configDirectory) {
+        this.mcLogOutputFile = new File(configDirectory, "mc-log.txt");
+        try {
+            mcLogOutputFile.createNewFile();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        this.searchQuery = SEARCH_QUERY_PLACE_HOLDER;
+        this.searchResults = new ArrayList<>();
+        this.dateStart = MooConfig.calculateStartDate();
+        this.dateEnd = LocalDate.now();
+        this.chatOnly = true;
+    }
+
+    /**
+     * Adds the buttons (and other controls) to the screen in question. Called when the GUI is displayed and when the
+     * window resizes, the buttonList is cleared beforehand.
+     */
+    @Override
+    public void initGui() {
+        this.guiTooltips = new ArrayList<>();
+
+        this.fieldSearchQuery = new GuiTextField(42, this.fontRendererObj, this.width / 2 - 100, 13, 200, 20);
+        this.fieldSearchQuery.setMaxStringLength(255);
+        this.fieldSearchQuery.setText(searchQuery);
+        if (SEARCH_QUERY_PLACE_HOLDER.equals(searchQuery)) {
+            this.fieldSearchQuery.setFocused(true);
+            this.fieldSearchQuery.setSelectionPos(0);
+        }
+
+        // date field: start
+        this.fieldDateStart = new GuiDateField(50, this.fontRendererObj, this.width / 2 + 110, 15, 70, 15);
+        this.fieldDateStart.setText(dateStart.toString());
+        addTooltip(fieldDateStart, Arrays.asList(EnumChatFormatting.YELLOW + "Start date", "" + EnumChatFormatting.GRAY + EnumChatFormatting.ITALIC + "Format: " + EnumChatFormatting.RESET + "year-month-day"));
+        // date field: end
+        this.fieldDateEnd = new GuiDateField(51, this.fontRendererObj, this.width / 2 + 110, 35, 70, 15);
+        this.fieldDateEnd.setText(dateEnd.toString());
+        addTooltip(fieldDateEnd, Arrays.asList(EnumChatFormatting.YELLOW + "End date", "" + EnumChatFormatting.GRAY + EnumChatFormatting.ITALIC + "Format: " + EnumChatFormatting.RESET + "year-month-day"));
+
+        // close
+        this.buttonList.add(this.buttonClose = new GuiButtonExt(0, this.width - 25, 3, 22, 20, EnumChatFormatting.RED + "X"));
+        addTooltip(buttonClose, Arrays.asList(EnumChatFormatting.RED + "Close search interface", "" + EnumChatFormatting.GRAY + EnumChatFormatting.ITALIC + "Hint:" + EnumChatFormatting.RESET + " alternatively press ESC"));
+        // help
+        this.buttonList.add(this.buttonHelp = new GuiButtonExt(1, this.width - 25 - 25, 3, 22, 20, "?"));
+        addTooltip(buttonHelp, Collections.singletonList(EnumChatFormatting.YELLOW + "Show help"));
+
+        // chatOnly
+        this.buttonList.add(this.checkboxChatOnly = new GuiCheckBox(21, this.width / 2 - 100, 35, " Chatbox only", chatOnly));
+        addTooltip(checkboxChatOnly, Collections.singletonList(EnumChatFormatting.YELLOW + "Should " + EnumChatFormatting.GOLD + "only " + EnumChatFormatting.YELLOW + "results that have " + EnumChatFormatting.GOLD + "appeared in the chat box " + EnumChatFormatting.YELLOW + "be displayed?\n"
+                + EnumChatFormatting.GRAY + "For example, this " + EnumChatFormatting.WHITE + "excludes error messages" + EnumChatFormatting.GRAY + " but still " + EnumChatFormatting.WHITE + "includes messages sent by a server" + EnumChatFormatting.GRAY + "."));
+        // matchCase
+        this.buttonList.add(this.checkboxMatchCase = new GuiCheckBox(20, this.width / 2 - 100, 45, " Match case", matchCase));
+        addTooltip(checkboxMatchCase, Collections.singletonList(EnumChatFormatting.YELLOW + "Should the search be " + EnumChatFormatting.GOLD + "case-sensitive" + EnumChatFormatting.YELLOW + "?"));
+        // removeFormatting
+        this.buttonList.add(this.checkboxRemoveFormatting = new GuiCheckBox(22, this.width / 2 - 100, 55, " Remove formatting", removeFormatting));
+        addTooltip(checkboxRemoveFormatting, Collections.singletonList(EnumChatFormatting.YELLOW + "Should " + EnumChatFormatting.GOLD + "formatting " + EnumChatFormatting.YELLOW + "and " + EnumChatFormatting.GOLD + "color codes " + EnumChatFormatting.YELLOW + "be " + EnumChatFormatting.GOLD + "removed " + EnumChatFormatting.YELLOW + "from the search results?"));
+        // search
+        this.buttonList.add(this.buttonSearch = new GuiButtonExt(100, this.width / 2 + 40, 40, 60, 20, "Search"));
+
+        this.guiSearchResults = new SearchResults(70);
+        this.guiSearchResults.setResults(searchResults);
+
+        this.setIsSearchInProgress(isSearchInProgress);
+
+        boolean isStartDateValid = fieldDateStart.validateDate();
+        boolean isEndDateValid = fieldDateEnd.validateDate();
+        this.buttonSearch.enabled = !isSearchInProgress && this.fieldSearchQuery.getText().trim().length() > 1 && !this.fieldSearchQuery.getText().startsWith(SEARCH_QUERY_PLACE_HOLDER) && isStartDateValid && isEndDateValid && !dateStart.isAfter(dateEnd);
+
+        if (isStartDateValid && isEndDateValid && dateStart.isAfter(dateEnd)) {
+            fieldDateStart.setTextColor(0xFFDD3333);
+            fieldDateEnd.setTextColor(0xFFCC3333);
+        }
+    }
+
+    private <T extends Gui> void addTooltip(T field, List<String> tooltip) {
+        GuiTooltip guiTooltip = new GuiTooltip(field, tooltip);
+        this.guiTooltips.add(guiTooltip);
+    }
+
+    @Override
+    public void updateScreen() {
+        fieldSearchQuery.updateCursorCounter();
+        fieldDateStart.updateCursorCounter();
+        fieldDateEnd.updateCursorCounter();
+    }
+
+    @Override
+    protected void mouseClicked(int mouseX, int mouseY, int mouseButton) throws IOException {
+        // allow clicks on 'close' button even while a search is in progress
+        super.mouseClicked(mouseX, mouseY, mouseButton);
+        if (isSearchInProgress) {
+            // search in progress, abort
+            return;
+        }
+        fieldSearchQuery.mouseClicked(mouseX, mouseY, mouseButton);
+        fieldDateStart.mouseClicked(mouseX, mouseY, mouseButton);
+        fieldDateEnd.mouseClicked(mouseX, mouseY, mouseButton);
+    }
+
+    @Override
+    protected void keyTyped(char typedChar, int keyCode) throws IOException {
+        if (isSearchInProgress && keyCode != Keyboard.KEY_ESCAPE) {
+            // search in progress, don't process key typed - but allow escape to exit gui
+            return;
+        }
+        if (dateStart.isBefore(dateEnd)) {
+            fieldDateStart.setTextColor(0xFFFFFFFF);
+            fieldDateEnd.setTextColor(0xFFFFFFFF);
+        }
+        if (keyCode == Keyboard.KEY_RETURN && this.fieldSearchQuery.isFocused()) {
+            // perform search
+            actionPerformed(buttonSearch);
+        } else if (this.fieldSearchQuery.textboxKeyTyped(typedChar, keyCode)) {
+            searchQuery = this.fieldSearchQuery.getText();
+        } else if (this.fieldDateStart.textboxKeyTyped(typedChar, keyCode)) {
+            if (fieldDateStart.validateDate()) {
+                dateStart = fieldDateStart.getDate();
+            }
+        } else if (this.fieldDateEnd.textboxKeyTyped(typedChar, keyCode)) {
+            if (fieldDateEnd.validateDate()) {
+                dateEnd = fieldDateEnd.getDate();
+            }
+        } else if (GuiScreen.isKeyComboCtrlA(keyCode)) {
+            // copy all search results
+            String searchResults = guiSearchResults.getAllSearchResults();
+            if (!searchResults.isEmpty()) {
+                GuiScreen.setClipboardString(searchResults);
+            }
+        } else if (GuiScreen.isKeyComboCtrlC(keyCode)) {
+            // copy current selected entry
+            LogEntry selectedSearchResult = guiSearchResults.getSelectedSearchResult();
+            if (selectedSearchResult != null) {
+                GuiScreen.setClipboardString(EnumChatFormatting.getTextWithoutFormattingCodes(selectedSearchResult.getMessage()));
+            }
+        } else if (keyCode == Keyboard.KEY_C && isCtrlKeyDown() && isShiftKeyDown() && !isAltKeyDown()) {
+            // copy current selected entry with formatting codes
+            LogEntry selectedSearchResult = guiSearchResults.getSelectedSearchResult();
+            if (selectedSearchResult != null) {
+                GuiScreen.setClipboardString(selectedSearchResult.getMessage());
+            }
+        } else {
+            if (keyCode == Keyboard.KEY_ESCAPE) {
+                guiSearchResults = null;
+            }
+            super.keyTyped(typedChar, keyCode);
+        }
+
+        boolean isStartDateValid = fieldDateStart.validateDate();
+        boolean isEndDateValid = fieldDateEnd.validateDate();
+        this.buttonSearch.enabled = !isSearchInProgress && searchQuery.trim().length() > 1 && !searchQuery.startsWith(SEARCH_QUERY_PLACE_HOLDER) && isStartDateValid && isEndDateValid && !dateStart.isAfter(dateEnd);
+
+        if (isStartDateValid && isEndDateValid && dateStart.isAfter(dateEnd)) {
+            fieldDateStart.setTextColor(0xFFDD3333);
+            fieldDateEnd.setTextColor(0xFFCC3333);
+        }
+    }
+
+    @Override
+    public void drawScreen(int mouseX, int mouseY, float partialTicks) {
+        this.drawDefaultBackground();
+        this.drawCenteredString(this.fontRendererObj, EnumChatFormatting.BOLD + "Minecraft Log Search", this.width / 2, 2, 0xFFFFFF);
+        this.fieldSearchQuery.drawTextBox();
+        this.fieldDateStart.drawTextBox();
+        this.fieldDateEnd.drawTextBox();
+        this.guiSearchResults.drawScreen(mouseX, mouseY, partialTicks);
+
+        super.drawScreen(mouseX, mouseY, partialTicks);
+
+        for (GuiTooltip guiTooltip : guiTooltips) {
+            if (guiTooltip.checkHover(mouseX, mouseY)) {
+                drawHoveringText(guiTooltip.getText(), mouseX, mouseY, 300);
+                // only one tooltip can be displayed at a time: break!
+                break;
+            }
+        }
+    }
+
+    @Override
+    protected void actionPerformed(GuiButton button) throws IOException {
+        if (button == this.buttonClose && button.enabled) {
+            guiSearchResults = null;
+            this.mc.setIngameFocus();
+        }
+        if (isSearchInProgress || !button.enabled) {
+            return;
+        }
+        if (button == this.buttonSearch) {
+            setIsSearchInProgress(true);
+
+            executorService.execute(() -> {
+                try {
+                    ImmutableTriple<Integer, Integer, List<LogEntry>> searchResultsData = new LogFilesSearcher().searchFor(this.fieldSearchQuery.getText(), checkboxChatOnly.isChecked(), checkboxMatchCase.isChecked(), checkboxRemoveFormatting.isChecked(), dateStart, dateEnd);
+                    this.searchResults = searchResultsData.right;
+                    this.analyzedFiles = "Analyzed files: " + EnumChatFormatting.WHITE + searchResultsData.left;
+                    this.analyzedFilesWithHits = "Files with hits: " + EnumChatFormatting.WHITE + searchResultsData.middle;
+                    if (this.searchResults.isEmpty()) {
+                        this.searchResults.add(new LogEntry(EnumChatFormatting.ITALIC + "No results"));
+                        areEntriesSearchResults = false;
+                    } else {
+                        areEntriesSearchResults = true;
+                    }
+                } catch (IOException e) {
+                    System.err.println("Error reading/parsing file log files:");
+                    e.printStackTrace();
+                    if (e.getStackTrace().length > 0) {
+                        searchResults.add(new LogEntry(StringUtils.replaceEach(ExceptionUtils.getStackTrace(e), new String[]{"\t", "\r\n"}, new String[]{"  ", "\n"})));
+                    }
+                }
+                Minecraft.getMinecraft().addScheduledTask(() -> {
+                    this.guiSearchResults.setResults(this.searchResults);
+                    setIsSearchInProgress(false);
+                });
+            });
+        } else if (button == checkboxChatOnly) {
+            chatOnly = checkboxChatOnly.isChecked();
+        } else if (button == checkboxMatchCase) {
+            matchCase = checkboxMatchCase.isChecked();
+        } else if (button == checkboxRemoveFormatting) {
+            removeFormatting = checkboxRemoveFormatting.isChecked();
+        } else if (button == buttonHelp) {
+            this.areEntriesSearchResults = false;
+            this.searchResults.clear();
+            this.searchResults.add(new LogEntry("" + EnumChatFormatting.GOLD + EnumChatFormatting.BOLD + "Initial setup/Configuration " + EnumChatFormatting.GRAY + EnumChatFormatting.ITALIC + "/moo config"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " 1) " + EnumChatFormatting.RESET + "Configure directories that should be scanned for log files (\"Directories with Minecraft log files\")"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " 2) " + EnumChatFormatting.RESET + "Set default starting date (\"Start date for log file search\")"));
+            this.searchResults.add(new LogEntry("" + EnumChatFormatting.GOLD + EnumChatFormatting.BOLD + "Performing a search " + EnumChatFormatting.GRAY + EnumChatFormatting.ITALIC + "/moo search"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " 1) " + EnumChatFormatting.RESET + "Enter search term"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " 2) " + EnumChatFormatting.RESET + "Adjust start and end date"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " 3) " + EnumChatFormatting.RESET + "Select desired options (match case, ...)"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " 4) " + EnumChatFormatting.RESET + "Click 'Search'"));
+            this.searchResults.add(new LogEntry("" + EnumChatFormatting.GOLD + EnumChatFormatting.BOLD + "Search results"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " - " + EnumChatFormatting.YELLOW + "CTRL + C " + EnumChatFormatting.RESET + "to copy selected search result"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " - " + EnumChatFormatting.YELLOW + "CTRL + Shift + C " + EnumChatFormatting.RESET + "to copy selected search result " + EnumChatFormatting.ITALIC + "with" + EnumChatFormatting.RESET + " formatting codes"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " - " + EnumChatFormatting.YELLOW + "CTRL + A " + EnumChatFormatting.RESET + "to copy all search results"));
+            this.searchResults.add(new LogEntry(EnumChatFormatting.GOLD + " - " + EnumChatFormatting.YELLOW + "Double click search result " + EnumChatFormatting.RESET + "to open corresponding log file in default text editor"));
+            this.guiSearchResults.setResults(searchResults);
+        }
+    }
+
+    private void setIsSearchInProgress(boolean isSearchInProgress) {
+        this.isSearchInProgress = isSearchInProgress;
+        buttonSearch.enabled = !isSearchInProgress;
+        fieldSearchQuery.setEnabled(!isSearchInProgress);
+        fieldDateStart.setEnabled(!isSearchInProgress);
+        fieldDateEnd.setEnabled(!isSearchInProgress);
+        checkboxChatOnly.enabled = !isSearchInProgress;
+        checkboxMatchCase.enabled = !isSearchInProgress;
+        checkboxRemoveFormatting.enabled = !isSearchInProgress;
+        if (isSearchInProgress) {
+            fieldSearchQuery.setFocused(false);
+            fieldDateStart.setFocused(false);
+            fieldDateEnd.setFocused(false);
+            buttonSearch.displayString = EnumChatFormatting.ITALIC + "Searching";
+            searchResults.clear();
+            guiSearchResults.clearResults();
+            analyzedFiles = null;
+            analyzedFilesWithHits = null;
+        } else {
+            buttonSearch.displayString = "Search";
+        }
+    }
+
+    private void drawHoveringText(List<String> textLines, int mouseX, int mouseY, int maxTextWidth) {
+        if (ForgeVersion.getBuildVersion() < 1808) {
+            // we're running a forge version from before 24 March 2016 (http://files.minecraftforge.net/maven/net/minecraftforge/forge/index_1.8.9.html for reference)
+            // using mc built-in method
+            drawHoveringText(textLines, mouseX, mouseY, fontRendererObj);
+        } else {
+            // we're on a newer forge version, so we can use the improved tooltip rendering added in 1.8.9-11.15.1.1808 (released 03/24/16 09:25 PM) in this pull request: https://github.com/MinecraftForge/MinecraftForge/pull/2649
+            GuiUtils.drawHoveringText(textLines, mouseX, mouseY, width, height, maxTextWidth, fontRendererObj);
+        }
+    }
+
+    /**
+     * List gui element similar to GuiModList.Info
+     */
+    class SearchResults extends GuiScrollingList {
+        private final String[] spinner = new String[]{"oooooo", "Oooooo", "oOoooo", "ooOooo", "oooOoo", "ooooOo", "oooooO"};
+        private final DateTimeFormatter coloredDateFormatter = DateTimeFormatter.ofPattern(EnumChatFormatting.GRAY + "HH" + EnumChatFormatting.DARK_GRAY + ":" + EnumChatFormatting.GRAY + "mm" + EnumChatFormatting.DARK_GRAY + ":" + EnumChatFormatting.GRAY + "ss");
+        private List<LogEntry> rawResults;
+        private List<IChatComponent> slotsData;
+        /**
+         * key: slot id of 1st line of a search result (if multi-line-result), value: search result id
+         */
+        private NavigableMap<Integer, Integer> searchResultEntries;
+        private Pair<Long, String> errorMessage;
+        private String resultsCount;
+
+        SearchResults(int marginTop) {
+            super(GuiSearch.this.mc,
+                    GuiSearch.this.width - 10, // 5 pixel margin each
+                    GuiSearch.this.height - marginTop - 5,
+                    marginTop, GuiSearch.this.height - 5,
+                    5, 12,
+                    GuiSearch.this.width,
+                    GuiSearch.this.height);
+            this.rawResults = Collections.emptyList();
+            this.slotsData = Collections.emptyList();
+            this.searchResultEntries = Collections.emptyNavigableMap();
+        }
+
+        @Override
+        public void drawScreen(int mouseX, int mouseY, float partialTicks) {
+            super.drawScreen(mouseX, mouseY, partialTicks);
+            if (isSearchInProgress) {
+                // spinner taken from IProgressMeter and GuiAchievements#drawScreen
+                GuiSearch.this.drawCenteredString(GuiSearch.this.fontRendererObj, "Searching for '" + GuiSearch.this.searchQuery + "'", GuiSearch.this.width / 2, GuiSearch.this.height / 2, 16777215);
+                GuiSearch.this.drawCenteredString(GuiSearch.this.fontRendererObj, spinner[(int) (Minecraft.getSystemTime() / 150L % (long) spinner.length)], GuiSearch.this.width / 2, GuiSearch.this.height / 2 + GuiSearch.this.fontRendererObj.FONT_HEIGHT * 2, 16777215);
+            }
+            int hoveredSlotId = this.func_27256_c(mouseX, mouseY);
+            if (hoveredSlotId >= 0 && mouseY > top && mouseY < bottom) {
+                float scrollDistance = getScrollDistance();
+                if (scrollDistance != Float.MIN_VALUE) {
+                    // draw hovered entry details
+
+                    int hoveredSearchResultId = getSearchResultIdBySlotId(hoveredSlotId);
+                    LogEntry hoveredEntry = getSearchResultByResultId(hoveredSearchResultId);
+                    if (hoveredEntry != null && !hoveredEntry.isError()) {
+                        // draw 'tooltips' in the top left corner
+                        drawString(fontRendererObj, "Log file: ", 2, 2, 0xff888888);
+                        GlStateManager.pushMatrix();
+                        float scaleFactor = 0.75f;
+                        GL11.glScalef(scaleFactor, scaleFactor, scaleFactor);
+                        fontRendererObj.drawSplitString(EnumChatFormatting.GRAY + Utils.toRealPath(hoveredEntry.getFilePath()), 5, (int) ((4 + fontRendererObj.FONT_HEIGHT) * (1 / scaleFactor)), (int) ((GuiSearch.this.fieldSearchQuery.xPosition - 8) * (1 / scaleFactor)), 0xff888888);
+                        GlStateManager.popMatrix();
+                        drawString(fontRendererObj, "Result: " + EnumChatFormatting.WHITE + (hoveredSearchResultId + 1) + EnumChatFormatting.RESET + "/" + EnumChatFormatting.WHITE + this.rawResults.size(), 8, 48, 0xff888888);
+                        drawString(fontRendererObj, "Time: " + hoveredEntry.getTime().format(coloredDateFormatter), 8, 58, 0xff888888);
+                    }
+
+                    // formula from GuiScrollingList#drawScreen slotTop
+                    int baseY = this.top + /* border: */4 - (int) scrollDistance;
+
+                    // highlight multiline search results
+                    Integer resultIndexStart = searchResultEntries.floorKey(hoveredSlotId);
+                    Integer resultIndexEnd = searchResultEntries.higherKey(hoveredSlotId);
+
+                    if (resultIndexStart == null) {
+                        return;
+                    } else if (resultIndexEnd == null) {
+                        // last result entry
+                        resultIndexEnd = getSize();
+                    }
+
+                    int slotTop = baseY + resultIndexStart * this.slotHeight - 2;
+                    int slotBottom = baseY + resultIndexEnd * this.slotHeight - 2;
+                    drawRect(this.left, Math.max(slotTop, top), right - /* scrollBar: */7, Math.min(slotBottom, bottom), 0x22ffffff);
+                }
+            } else if (areEntriesSearchResults) {
+                if (analyzedFiles != null) {
+                    drawString(fontRendererObj, analyzedFiles, 8, 22, 0xff888888);
+                }
+                if (analyzedFilesWithHits != null) {
+                    drawString(fontRendererObj, analyzedFilesWithHits, 8, 32, 0xff888888);
+                }
+                if (resultsCount != null) {
+                    drawString(fontRendererObj, resultsCount, 8, 48, 0xff888888);
+                }
+            }
+            if (errorMessage != null) {
+                if (errorMessage.first().compareTo(System.currentTimeMillis()) > 0) {
+                    String errorText = "Error: " + EnumChatFormatting.RED + errorMessage.second();
+                    int stringWidth = fontRendererObj.getStringWidth(errorText);
+                    int margin = 5;
+                    int left = width / 2 - stringWidth / 2 - margin;
+                    int top = height / 2 - margin;
+                    drawRect(left, top, left + stringWidth + 2 * margin, top + fontRendererObj.FONT_HEIGHT + 2 * margin, 0xff000000);
+                    drawCenteredString(fontRendererObj, errorText,/* 2, 30*/width / 2, height / 2, 0xffDD1111);
+                } else {
+                    errorMessage = null;
+                }
+            }
+        }
+
+        private float getScrollDistance() {
+            Field scrollDistanceField = FieldUtils.getField(GuiScrollingList.class, "scrollDistance", true);
+            if (scrollDistanceField == null) {
+                // scrollDistance field not found in class GuiScrollingList
+                return Float.MIN_VALUE;
+            }
+            try {
+                return (float) scrollDistanceField.get(this);
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+                return Float.MIN_VALUE;
+            }
+        }
+
+        @Override
+        protected int getSize() {
+            return slotsData.size();
+        }
+
+        @Override
+        protected void elementClicked(int index, boolean doubleClick) {
+            if (doubleClick) {
+                int searchResultIdBySlotId = getSearchResultIdBySlotId(index);
+                LogEntry searchResult = rawResults.get(searchResultIdBySlotId);
+                if (searchResult.getFilePath() == null) {
+                    setErrorMessage("This log entry is not from a file");
+                    return;
+                }
+                byte[] buffer = new byte[1024];
+                String logFileName = Utils.toRealPath(searchResult.getFilePath());
+                if (logFileName.endsWith("latest.log")) {
+                    try {
+                        Files.copy(searchResult.getFilePath(), mcLogOutputFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                } else { // .log.gz
+                    String newLine = System.getProperty("line.separator");
+                    String fileHeader = "# Original filename: " + logFileName + newLine + "# Use CTRL + F to search for specific words" + newLine + newLine;
+                    try (GZIPInputStream logFileGzipped = new GZIPInputStream(new FileInputStream(logFileName));
+                         FileOutputStream logFileUnGzipped = new FileOutputStream(mcLogOutputFile)) {
+                        logFileUnGzipped.write(fileHeader.getBytes());
+                        int len;
+                        while ((len = logFileGzipped.read(buffer)) > 0) {
+                            logFileUnGzipped.write(buffer, 0, len);
+                        }
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+
+                try {
+                    Desktop.getDesktop().open(mcLogOutputFile);
+                } catch (IOException e) {
+                    setErrorMessage("File extension .txt has no associated default editor");
+                    e.printStackTrace();
+                } catch (IllegalArgumentException e) {
+                    setErrorMessage(e.getMessage()); // The file: <path> doesn't exist.
+                    e.printStackTrace();
+                } catch (UnsupportedOperationException e) {
+                    setErrorMessage("Can't open files on this OS");
+                    e.printStackTrace();
+                }
+            }
+        }
+
+        private void setErrorMessage(String errorMessage) {
+            int showDuration = 10000; // ms
+            this.errorMessage = Pair.of(System.currentTimeMillis() + showDuration, errorMessage);
+        }
+
+        @Override
+        protected boolean isSelected(int index) {
+            return false;
+        }
+
+        @Override
+        protected void drawBackground() {
+        }
+
+        @Override
+        protected void drawSlot(int slotIdx, int entryRight, int slotTop, int slotBuffer, Tessellator tess) {
+            int drawnResultIndex = searchResultEntries.floorKey(slotIdx);
+            if (Objects.equals(searchResultEntries.floorKey(selectedIndex), drawnResultIndex)) {
+                // highlight all lines of selected entry
+                drawRect(this.left, slotTop - 2, entryRight, slotTop + slotHeight - 2, 0x99000000);
+            }
+            IChatComponent slotData = slotsData.get(slotIdx);
+            if (slotData != null) {
+                GlStateManager.enableBlend();
+                GuiSearch.this.fontRendererObj.drawStringWithShadow(slotData.getFormattedText(), this.left + 4, slotTop, 0xFFFFFF);
+                GlStateManager.disableAlpha();
+                GlStateManager.disableBlend();
+            }
+        }
+
+        private void setResults(List<LogEntry> searchResult) {
+            this.rawResults = searchResult;
+            this.slotsData = resizeContent(searchResult);
+            if (GuiSearch.this.areEntriesSearchResults) {
+                this.resultsCount = "Results: " + EnumChatFormatting.WHITE + this.rawResults.size();
+            }
+        }
+
+        private void clearResults() {
+            this.rawResults = Collections.emptyList();
+            this.resultsCount = null;
+            this.slotsData = resizeContent(Collections.emptyList());
+        }
+
+        private List<IChatComponent> resizeContent(List<LogEntry> searchResults) {
+            this.searchResultEntries = new TreeMap<>();
+            List<IChatComponent> slotsData = new ArrayList<>();
+            for (int searchResultIndex = 0; searchResultIndex < searchResults.size(); searchResultIndex++) {
+                LogEntry searchResult = searchResults.get(searchResultIndex);
+
+                String searchResultEntry;
+                if (searchResult.isError()) {
+                    searchResultEntry = searchResult.getMessage();
+                } else {
+                    searchResultEntry = EnumChatFormatting.DARK_GRAY + searchResult.getTime().format(DateTimeFormatter.ISO_LOCAL_DATE) + " " + EnumChatFormatting.RESET + searchResult.getMessage();
+                }
+                searchResultEntries.put(slotsData.size(), searchResultIndex);
+                List<IChatComponent> multilineResult = GuiUtilRenderComponents.splitText(new ChatComponentText(searchResultEntry), this.listWidth - 8, GuiSearch.this.fontRendererObj, false, true);
+                slotsData.addAll(multilineResult);
+            }
+            return slotsData;
+        }
+
+        LogEntry getSelectedSearchResult() {
+            int searchResultId = getSearchResultIdBySlotId(selectedIndex);
+            return getSearchResultByResultId(searchResultId);
+        }
+
+        private LogEntry getSearchResultByResultId(int searchResultId) {
+            return (searchResultId >= 0 && searchResultId < rawResults.size()) ? rawResults.get(searchResultId) : null;
+        }
+
+        private int getSearchResultIdBySlotId(int slotId) {
+            Map.Entry<Integer, Integer> searchResultIds = searchResultEntries.floorEntry(slotId);
+            return searchResultIds != null ? searchResultIds.getValue() : -1;
+        }
+
+        String getAllSearchResults() {
+            return rawResults.stream().map(logEntry -> EnumChatFormatting.getTextWithoutFormattingCodes(logEntry.getMessage()))
+                    .collect(Collectors.joining("\n"));
+        }
+    }
+}
diff --git a/src/main/java/eu/olli/cowlection/search/GuiTooltip.java b/src/main/java/eu/olli/cowlection/search/GuiTooltip.java
new file mode 100644
index 0000000..f76bf2d
--- /dev/null
+++ b/src/main/java/eu/olli/cowlection/search/GuiTooltip.java
@@ -0,0 +1,50 @@
+package eu.olli.cowlection.search;
+
+import net.minecraft.client.gui.Gui;
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.gui.GuiTextField;
+import net.minecraftforge.fml.client.config.GuiCheckBox;
+import net.minecraftforge.fml.client.config.HoverChecker;
+
+import java.util.List;
+
+public class GuiTooltip {
+    private final HoverChecker hoverChecker;
+    private final List<String> tooltip;
+
+    public <T extends Gui> GuiTooltip(T field, List<String> tooltip) {
+        if (field instanceof GuiCheckBox) {
+            // checkbox
+            GuiCheckBox guiCheckBox = (GuiCheckBox) field;
+            int top = guiCheckBox.yPosition;
+            int bottom = guiCheckBox.yPosition + guiCheckBox.height;
+            int left = guiCheckBox.xPosition;
+            int right = guiCheckBox.xPosition + guiCheckBox.width;
+
+            this.hoverChecker = new HoverChecker(top, bottom, left, right, 300);
+        } else if (field instanceof GuiTextField) {
+            // text field
+            GuiTextField guiTextField = (GuiTextField) field;
+            int top = guiTextField.yPosition;
+            int bottom = guiTextField.yPosition + guiTextField.height;
+            int left = guiTextField.xPosition;
+            int right = guiTextField.xPosition + guiTextField.width;
+
+            this.hoverChecker = new HoverChecker(top, bottom, left, right, 300);
+        } else if (field instanceof GuiButton) {
+            // button
+            this.hoverChecker = new HoverChecker((GuiButton) field, 300);
+        } else {
+            throw new IllegalArgumentException("Tried to add a tooltip to an illegal field type: " + field.getClass());
+        }
+        this.tooltip = tooltip;
+    }
+
+    public List<String> getText() {
+        return tooltip;
+    }
+
+    public boolean checkHover(int mouseX, int mouseY) {
+        return hoverChecker.checkHover(mouseX, mouseY);
+    }
+}
diff --git a/src/main/java/eu/olli/cowlection/search/LogFilesSearcher.java b/src/main/java/eu/olli/cowlection/search/LogFilesSearcher.java
new file mode 100644
index 0000000..7aeb2aa
--- /dev/null
+++ b/src/main/java/eu/olli/cowlection/search/LogFilesSearcher.java
@@ -0,0 +1,181 @@
+package eu.olli.cowlection.search;
+
+import eu.olli.cowlection.config.MooConfig;
+import eu.olli.cowlection.data.LogEntry;
+import net.minecraft.util.EnumChatFormatting;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.tuple.ImmutableTriple;
+
+import java.io.*;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.zip.GZIPInputStream;
+
+class LogFilesSearcher {
+    /**
+     * Log4j.xml PatternLayout: [%d{HH:mm:ss}] [%t/%level]: %msg%n
+     * Log line: [TIME] [THREAD/LEVEL]: [CHAT] msg
+     * examples:
+     * - [13:33:37] [Client thread/INFO]: [CHAT] Hello World
+     * - [08:15:42] [Client thread/ERROR]: Item entity 9001 has no item?!
+     */
+    private static final Pattern LOG4J_PATTERN = Pattern.compile("^\\[(?<timeHours>[\\d]{2}):(?<timeMinutes>[\\d]{2}):(?<timeSeconds>[\\d]{2})] \\[(?<thread>[^/]+)/(?<logLevel>[A-Z]+)]:(?<isChat> \\[CHAT])? (?<message>.*)$");
+    private int analyzedFilesWithHits = 0;
+
+    ImmutableTriple<Integer, Integer, List<LogEntry>> searchFor(String searchQuery, boolean chatOnly, boolean matchCase, boolean removeFormatting, LocalDate dateStart, LocalDate dateEnd) throws IOException {
+        List<Path> files = new ArrayList<>();
+        for (String logsDirPath : MooConfig.logsDirs) {
+            File logsDir = new File(logsDirPath);
+            if (logsDir.exists() && logsDir.isDirectory()) {
+                try {
+                    files.addAll(fileList(logsDir, dateStart, dateEnd));
+                } catch (IOException e) {
+                    throw throwIoException(logsDirPath, e);
+                }
+            }
+        }
+
+        if (files.isEmpty()) {
+            throw new FileNotFoundException(EnumChatFormatting.DARK_RED + "ERROR: Couldn't find any Minecraft log files. Please check if the log file directories are set correctly (/moo config).");
+        } else {
+            List<LogEntry> searchResults = analyzeFiles(files, searchQuery, chatOnly, matchCase, removeFormatting)
+                    .stream().sorted(Comparator.comparing(LogEntry::getTime)).collect(Collectors.toList());
+            return new ImmutableTriple<>(files.size(), analyzedFilesWithHits, searchResults);
+        }
+    }
+
+    private List<LogEntry> analyzeFiles(List<Path> paths, String searchTerm, boolean chatOnly, boolean matchCase, boolean removeFormatting) throws IOException {
+        List<LogEntry> searchResults = new ArrayList<>();
+        for (Path path : paths) {
+            boolean foundSearchTermInFile = false;
+            try (BufferedReader in = (path.endsWith("latest.log")
+                    ? new BufferedReader(new InputStreamReader(new FileInputStream(path.toFile()))) // latest.log
+                    : new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(path.toFile())))))) { // ....log.gz
+                String fileName = path.getFileName().toString(); // 2020-04-20-3.log.gz
+                String date = fileName.equals("latest.log")
+                        ? LocalDate.now().format(DateTimeFormatter.ISO_LOCAL_DATE)
+                        : fileName.substring(0, fileName.lastIndexOf('-'));
+                String content;
+                LogEntry logEntry = null;
+                while ((content = in.readLine()) != null) {
+                    Matcher logLineMatcher = LOG4J_PATTERN.matcher(content);
+                    if (logLineMatcher.matches()) { // current line is a new log entry
+                        if (logEntry != null) {
+                            // we had a previous log entry; analyze it!
+                            LogEntry result = analyzeLogEntry(logEntry, searchTerm, matchCase, removeFormatting);
+                            if (result != null) {
+                                searchResults.add(result);
+                                foundSearchTermInFile = true;
+                            }
+                            logEntry = null;
+                        }
+                        // handle first line of new log entry
+                        if (chatOnly && logLineMatcher.group("isChat") == null) {
+                            // not a chat log entry, although we're only searching for chat messages, abort!
+                            continue;
+                        }
+                        LocalDateTime dateTime = getDate(date, logLineMatcher);
+                        logEntry = new LogEntry(dateTime, path, logLineMatcher.group("message"));
+                    } else if (logEntry != null) {
+                        // multiline log entry
+                        logEntry.addLogLine(content);
+                    }
+                }
+                if (logEntry != null) {
+                    // end of file! analyze last log entry in file
+                    LogEntry result = analyzeLogEntry(logEntry, searchTerm, matchCase, removeFormatting);
+                    if (result != null) {
+                        searchResults.add(result);
+                        foundSearchTermInFile = true;
+                    }
+                }
+                if (foundSearchTermInFile) {
+                    analyzedFilesWithHits++;
+                }
+            } catch (IOException e) {
+                throw throwIoException(path.toString(), e);
+            }
+        }
+        return searchResults;
+    }
+
+    private LocalDateTime getDate(String date, Matcher logLineMatcher) {
+        int year = Integer.parseInt(date.substring(0, 4));
+        int month = Integer.parseInt(date.substring(5, 7));
+        int day = Integer.parseInt(date.substring(8, 10));
+        int hour = Integer.parseInt(logLineMatcher.group(1));
+        int minute = Integer.parseInt(logLineMatcher.group(2));
+        int sec = Integer.parseInt(logLineMatcher.group(3));
+
+        return LocalDateTime.of(year, month, day, hour, minute, sec);
+    }
+
+    private LogEntry analyzeLogEntry(LogEntry logEntry, String searchTerms, boolean matchCase, boolean removeFormatting) {
+        if (logEntry.getMessage().length() > 5000) {
+            // avoid ultra long log entries
+            return null;
+        }
+        logEntry.fixWeirdCharacters();
+
+        if (removeFormatting) {
+            logEntry.removeFormatting();
+        }
+        String logMessage = logEntry.getMessage();
+        if (!matchCase) {
+            if (!StringUtils.containsIgnoreCase(logMessage, searchTerms)) {
+                // no result, abort
+                return null;
+            }
+        } else if (!logMessage.contains(searchTerms)) {
+            // no result, abort
+            return null;
+        }
+
+        return logEntry;
+    }
+
+    private List<Path> fileList(File directory, LocalDate startDate, LocalDate endDate) throws IOException {
+        List<Path> fileNames = new ArrayList<>();
+        try (DirectoryStream<Path> directoryStream = Files.newDirectoryStream(directory.toPath())) {
+            for (Path path : directoryStream) {
+                if (path.toString().endsWith(".log.gz")) {
+                    String[] fileDate = path.getFileName().toString().split("-");
+                    if (fileDate.length == 4) {
+                        LocalDate fileLocalDate = LocalDate.of(Integer.parseInt(fileDate[0]),
+                                Integer.parseInt(fileDate[1]), Integer.parseInt(fileDate[2]));
+
+                        if (fileLocalDate.compareTo(startDate) >= 0 && fileLocalDate.compareTo(endDate) <= 0) {
+                            fileNames.add(path);
+                        }
+                    } else {
+                        System.err.println("Error with " + path.toString());
+                    }
+                } else if (path.getFileName().toString().equals("latest.log")) {
+                    LocalDate lastModified = Instant.ofEpochMilli(path.toFile().lastModified()).atZone(ZoneId.systemDefault()).toLocalDate();
+                    if (!lastModified.isBefore(startDate) && !lastModified.isAfter(endDate)) {
+                        fileNames.add(path);
+                    }
+                }
+            }
+        }
+        return fileNames;
+    }
+
+    private IOException throwIoException(String file, IOException e) throws IOException {
+        IOException ioException = new IOException(EnumChatFormatting.DARK_RED + "ERROR: An error occurred trying to read/parse '" + EnumChatFormatting.RED + file + EnumChatFormatting.DARK_RED + "'");
+        ioException.setStackTrace(e.getStackTrace());
+        throw ioException;
+    }
+}