addon/Addon/Code/DataApi.lua

local QuestTextMethod = {
    Description = GetQuestText,
    Objective = GetObjectiveText,
};

local function GetQuestText(method)
    local text = QuestTextMethod[method]();
    if text then
        return text
    else
        return ""
    end
end

local function GetQuestLogQuestIndex(questID)
    local numEntries = C_QuestLog.GetNumQuestLogEntries()
    for questLogIndex = 1, numEntries do
        local info = C_QuestLog.GetInfo(questLogIndex)
        if info and info.questID == questID then
            return questLogIndex
        end
    end
    return nil
end

local function ApplyQuestPlaceholders(text)
    if text == nil then
        return text
    end

    local playerName = UnitName("player")
    local _, playerClass = UnitClass("player")
    local _, playerRace = UnitRace("player")

    local class = CzechQuestsAddon:GetData("class", playerClass);
    local race = CzechQuestsAddon:GetData("race", playerRace);

    local formatted = text;
    formatted = string.gsub(formatted, '<name>', playerName);

    formatted = string.gsub(formatted, '<cF0>', class.f0);
    formatted = string.gsub(formatted, '<cF1>', class.f1);
    formatted = string.gsub(formatted, '<cF2>', class.f2);
    formatted = string.gsub(formatted, '<cF3>', class.f3);
    formatted = string.gsub(formatted, '<cF4>', class.f4);
    formatted = string.gsub(formatted, '<cF5>', class.f5);

    formatted = string.gsub(formatted, '<cM0>', class.m0);
    formatted = string.gsub(formatted, '<cM1>', class.m1);
    formatted = string.gsub(formatted, '<cM2>', class.m2);
    formatted = string.gsub(formatted, '<cM3>', class.m3);
    formatted = string.gsub(formatted, '<cM4>', class.m4);

    formatted = string.gsub(formatted, '<cP0>', class.p0);
    formatted = string.gsub(formatted, '<cP1>', class.p1);
    formatted = string.gsub(formatted, '<cP3>', class.m3);

    formatted = string.gsub(formatted, '<rF0>', race.f0);
    formatted = string.gsub(formatted, '<rF1>', race.f1);
    formatted = string.gsub(formatted, '<rF2>', race.f2);
    formatted = string.gsub(formatted, '<rF3>', race.f3);
    formatted = string.gsub(formatted, '<rF4>', race.f4);
    formatted = string.gsub(formatted, '<rF5>', race.f5);

    formatted = string.gsub(formatted, '<rM0>', race.m0);
    formatted = string.gsub(formatted, '<rM1>', race.m1);
    formatted = string.gsub(formatted, '<rM2>', race.m2);
    formatted = string.gsub(formatted, '<rM3>', race.m3);
    formatted = string.gsub(formatted, '<rM4>', race.m4);

    formatted = string.gsub(formatted, '<rP0>', race.p0);
    formatted = string.gsub(formatted, '<rP1>', race.p1);
    formatted = string.gsub(formatted, '<rP3>', race.p3);

    return formatted
end

local function TransformQuestText(text)
    return ApplyQuestPlaceholders(text)
end

local function ResolveGender(maleVersion, femaleVersion)
    local gender = UnitSex("player")
    if gender == 2 then
        return TransformQuestText(maleVersion)
    else
        return femaleVersion == nil and TransformQuestText(maleVersion) or TransformQuestText(femaleVersion)
    end
end

local function GetQuest(id)
    local quest = CzechQuestsAddon.data.quest[id];
    if quest then
        local description = ""
        local objective = ""
        if QuestMapDetailsScrollFrame and QuestMapDetailsScrollFrame:IsVisible() then
            local index = GetQuestLogQuestIndex(id)
            description, objective = GetQuestLogQuestText(index)
        else
            description = GetQuestText("Description")
            objective = GetQuestText("Objective")
        end
        return {
            title = ResolveGender(quest.titleMale, quest.titleFemale),
            objective = CzechQuestsAddon:TransformIntoParagraphs(
                    objective, ResolveGender(quest.objectiveMale, quest.objectiveFemale)
            ),
            description = CzechQuestsAddon:TransformIntoParagraphs(
                    description, ResolveGender(quest.descriptionMale, quest.descriptionFemale)
            ),
            progress = ResolveGender(quest.progressMale, quest.progressFemale),
            completion = ResolveGender(quest.completionMale, quest.completionFemale),
        }
    end
end


local function ApplySpeechPlaceholders(text)
    if text == nil then
        return text
    end

    local playerName = UnitName("player")

    local formatted = text;
    formatted = string.gsub(formatted, '<name>', playerName);
    formatted = string.gsub(formatted, 'Champions', playerName);

    return formatted
end

local function GetSpeech(message)
    local speech = CzechQuestsAddon.data.speech[message];
    local text = speech and speech.text or nil
    return ApplySpeechPlaceholders(text)
end

function CzechQuestsAddon:GetData(key, id)
    if CzechQuestsAddon.data[key] then
        if key == "quest" then
            return GetQuest(id)
        elseif key == "speech" then
            return GetSpeech(id)
        elseif CzechQuestsAddon.data[key][id] then
            return CzechQuestsAddon.data[key][id]
        end
    end
    return nil
end