Open Raid is a library to share the player information while playing in a group or raid.

Install:
Place the library at your addon folder/libs/LibOpenRaid/
Inside LibOpenRaid there's 5 files.
Add <Include file="Libs\LibOpenRaid\lib.xml"/> to your libs.xml located in the root folder of the addon or 
<Include file="LibOpenRaid\lib.xml"/> if it is located inside the Libs folder.
Close and open the game client.

Inside your lua file, get the library object, you need to do this in order to grab a reference of the library:
local openRaidLib = LibStub:GetLibrary("LibOpenRaid-1.0")
With this object, you can start querying the library for information.

Functions:

local sentRequest = openRaidLib.RequestAllData()
Request to all players in the group to send infomation on: cooldowns, gear and player data.
Instants after calling this, expect to receive several callbacks.

COOLDOWNS:
--get all cooldowns from all units
local allUnitsCooldowns = openRaidLib.GetAllUnitsCooldown()
allUnitsCooldowns = {
    ["playerName1"] = {[cooldownSpellId] = cooldownInfo, [cooldownSpellId] = cooldownInfo, ...}
    ["playerName2"] = {[cooldownSpellId] = cooldownInfo, [cooldownSpellId] = cooldownInfo, ...}
    ["playerName3"] = {[cooldownSpellId] = cooldownInfo, [cooldownSpellId] = cooldownInfo, ...}
}

--get all cooldowns from a single unit
local unitCooldows = openRaidLib.GetUnitCooldowns(unitId [,filter])
@unittId: "player", "target", "party2", "raid12", ...
@filter: "defensive-raid", "defensive-target", "defensive-personal", "ofensive", "utility", "interrupt"
can pass more than one filter separating by comma, example: "defensive-raid, defensive-target"
unitCooldows = {
    [cooldownSpellId] = cooldownInfo,
    [cooldownSpellId] = cooldownInfo,
    [cooldownSpellId] = cooldownInfo,
}

--get a cooldownInfo of a single spell from any unit
local cooldownInfo = openRaidLib.GetUnitCooldownInfo(unitId, spellId)

--get cooldown timers to use with progress bar or cooldown frames, percent are normalized (0 to 1), timeLeft is seconds, minValue/maxValue/currentValue are in GetTime() time space, amount of charges
--minValue is the same as startTime, maxValue is the same as expirationTime, currentValue is GetTime()
--by using unitID and spellID
local isReady, normalizedPercent, timeLeft, charges, minValue, maxValue, currentValue, cooldownDuration = openRaidLib.GetCooldownStatusFromUnitSpellID(unitId, spellId)
--by using a cooldown info
local isReady, normalizedPercent, timeLeft, charges, minValue, maxValue, currentValue, cooldownDuration = openRaidLib.GetCooldownStatusFromCooldownInfo(cooldownInfo)

--add spells to a custom filter
--to change the spells in the filter just call it again with different spells, spells not included in the new table are removed from the filter
--to remove the filter, call it with an empty table
@filterName: any string containing alphanumeric characters
@spells: a table containing spellIds {spellId, spellId, spellId, ...}
openRaidLib.AddCooldownFilter(filterName, spells)

--get a list of filters which a spell has, returns a table in map format: {[filterName] = true}
--@spellId: the ID of a spell
--@defaultFilterOnly (bool): if true only return built-in filters, example: "defensive-raid", "ofensive".
--@customFiltersOnly (bool): if true onlt return a list of custom filters where the spell was added.
local filterListArray = openRaidLib.GetSpellFilters(spellId, defaultFilterOnly, customFiltersOnly)

--request information about a spell for all units in the raid, units which has this cooldown will report back with a "CooldownUpdate" event
openRaidLib.RequestCooldownInfo(spellId)

EQUIPMENT:
local allPlayersGear = openRaidLib.GetAllUnitsGear()
allPlayersGear = {
    ["playerName1"] = playerGear,
    ["playerName2"] = playerGear,
    ["playerName3"] = playerGear,
}

local playerGear = openRaidLib.GetUnitGear(unitId)
playerGear = {
    .durability = number
    .ilevel = number
    .noGems = {socketId}
    .noEnchants = {socketId}
    .weaponEnchant = number (oils)
    .equippedGear = {
        {
            .slotId = number
            .gemSlots = number
            .itemLevel = number
            .itemLink = string
            .itemQuality = number
            .itemId = number
            .itemName = string
            .enchantId = number
            .gemId = number
            .isTier = boolean
        }
    }
}


UNIT INFORMATION
local allUnitsInfo = openRaidLib.GetAllUnitsInfo()
allUnitsInfo = {
    ["unitName1"] = unitInfo,
    ["unitName2"] = unitInfo,
    ["unitName3"] = unitInfo,
}

local unitInfo = openRaidLib.GetUnitInfo(unitId)
unitInfo = {
    .specId = number
    .specName = string
    .role = string
    .renown = number
    .covenantId = number
    .talents = {talentId, talentId, talentId, ...}
    .pvpTalents = {talentId, talentId, talentId}
    .conduits = {spellId, conduitLevel, spellId, conduitLevel, spellId, conduitLevel, ...}
    .class = string class eng name 'ROGUE'
    .classId = number
    .className = string class localized name
    .name = string name without realm
    .nameFull = string name with realm 'unitName-ServerName'
}


KEYSTONE
--send and receive mythic+ keystone information and works only in retail
--the event "KeystoneUpdate" is triggered on receive keystone info from another player

local allKeystoneInfo = openRaidLib.GetAllKeystonesInfo()
allKeystoneInfo = {
    ["unitName1"] = keystoneInfo,
    ["unitName2"] = keystoneInfo,
    ["unitName3"] = keystoneInfo,
}

--@mapID and @challengeMapID are the instanceMapID, also obtained with GetInstanceInfo(), can be used to retrive map name with GetRealZoneText(mapID)
--@mythicPlusMapID is used with C_ChallengeMode.GetMapUIInfo(mythicPlusMapID) to retrive the map name for the dungeon
--@classID: class id as number (1 to 12)
--@rating: mythic plus rating on the current season
local keystoneInfo = openRaidLib.GetKeystoneInfo(unitId)
keystoneInfo = {
    .level = number,
    .mapID = number,
    .challengeMapID = number,
    .classID = number,
    .rating = number,
    .mythicPlusMapID = number,
}

--request all online players in the guild to send their keystone information
--this call fails if the player isn't in a guild
local requestSent = openRaidLib.RequestKeystoneDataFromGuild()

--request to players in your party to send their keystone information
--this call fails if the player is in raid
local requestSent = openRaidLib.RequestKeystoneDataFromParty()

--request to players in your raid to send their keystone information
--this call fails if not in a raid group
local requestSent = openRaidLib.RequestKeystoneDataFromRaid()


FLASK and FOOD buffs
--@spellId: a regular spellId
local flaskInfo = openRaidLib.GetFlaskInfoBySpellId(spellId)

--@auraInfo: UnitAuraInfo -> https://wowpedia.fandom.com/wiki/Struct_UnitAuraInfo see C_UnitAuras.GetAuraDataBySlot()
local flaskTier = openRaidLib.GetFlaskTierFromAura(auraInfo)

--@spellId: a regular spellId
local foodInfo = openRaidLib.GetFoodInfoBySpellId(spellId)

--@auraInfo: UnitAuraInfo -> https://wowpedia.fandom.com/wiki/Struct_UnitAuraInfo see C_UnitAuras.GetAuraDataBySlot()
local foodTier = openRaidLib.GetFoodTierFromAura(auraInfo)


Callbacks:

===================================================================================================================================
"CooldownListUpdate": triggers when the lib received a list of cooldowns from another unit in the group.
@unitId: which unit got updated
@unitCooldows: list of cooldowns of the unit
@allUnitsCooldowns: a list of all players with their cooldowns
===================================================================================================================================

function MyAddonObject.OnReceiveCooldownListUpdate(unitId, unitCooldows, allUnitsCooldowns)
    --regular iteration among the group
    for i = 1, GetNumGroupMembers() do
        local unitId = "raid"..i
        local thisUnitCooldowns = openRaidLib.GetUnitCooldowns(unitId, "defensive-raid, defensive-target")
    end

    --using the 'unitCooldows' table passed for the updated unit
    for spellId, cooldownInfo in pairs(unitCooldows) do
        --minValue, maxValue, currentValue is the same as startTime, expirationTime, GetTime()
        local isReady, timeLeft, charges, normalizedPercent, minValue, maxValue, currentValue, cooldownDuration = openRaidLib.GetCooldownStatusFromCooldownInfo(cooldownInfo)
        --statusbar frame
        local statusbar = CreateFrame("statusbar", "MyStatusBar", UIParent)
        statusbar:SetMinMaxValues(minValue, maxValue)
        statusbar:SetValue(currentValue)
        --cooldown frame
        local cooldownFrame = CreateFrame("cooldown", "MyCooldownFrame", UIParent)
        local startTime = minValue
        CooldownFrame_Set(cooldownFrame, startTime, cooldownDuration, timeLeft > 0)
        --or
        cooldownFrame:SetCooldown(startTime, cooldownDuration)
    end

    --this event also passes a table with all player cooldowns
    for unitName, unitCooldows in pairs(allUnitsCooldowns) do
        for spellId, cooldownInfo in pairs(unitCooldows) do
            --minValue, maxValue, currentValue is the same as startTime, expirationTime, GetTime()
            local isReady, timeLeft, charges, normalizedPercent, minValue, maxValue, currentValue, cooldownDuration = openRaidLib.GetCooldownStatusFromCooldownInfo(cooldownInfo)
            --statusbar frame
            local statusbar = CreateFrame("statusbar", "MyStatusBar", UIParent)
            statusbar:SetMinMaxValues(0, 1)
            statusbar:SetValue(normalizedPercent)
            --cooldown frame
            local cooldownFrame = CreateFrame("cooldown", "MyCooldownFrame", UIParent)
            local startTime = minValue
            CooldownFrame_Set(cooldownFrame, startTime, cooldownDuration, timeLeft > 0)
            --or
            cooldownFrame:SetCooldown(startTime, cooldownDuration)            
        end
    end
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "CooldownListUpdate", "OnReceiveCooldownListUpdate")

===================================================================================================================================
"CooldownUpdate": triggered when an unit in the group uses a cooldown or the timeleft of a cooldown of an unit got an update
@unitId: which unit got the update
@spellId: id of the cooldown spell
@cooldownInfo: a table containing information about the cooldown time
@unitCooldows: list of cooldowns of the unit
@allUnitsCooldowns: a list of all players and their cooldowns
===================================================================================================================================

function MyAddonObject.OnReceiveCooldownUpdate(unitId, spellId, cooldownInfo, unitCooldows, allUnitsCooldowns)
    --minValue, maxValue, currentValue is the same as startTime, expirationTime, GetTime()
    local isReady, timeLeft, charges, normalizedPercent, minValue, maxValue, currentValue, cooldownDuration = openRaidLib.GetCooldownStatusFromCooldownInfo(cooldownInfo)
    --statusbar frame
    local statusbar = CreateFrame("statusbar", "MyStatusBar", UIParent)
    statusbar:SetMinMaxValues(minValue, maxValue)
    statusbar:SetValue(currentValue)
    --cooldown frame
    local cooldownFrame = CreateFrame("cooldown", "MyCooldownFrame", UIParent)
    local startTime = minValue
    CooldownFrame_Set(cooldownFrame, startTime, cooldownDuration, timeLeft > 0)
    --or
    cooldownFrame:SetCooldown(startTime, cooldownDuration)
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "CooldownUpdate", "OnReceiveCooldownUpdate")

===================================================================================================================================
"CooldownAdded": triggered when an unit get a new cooldown
@unitId: which unit got the update
@spellId: id of the cooldown spell
@cooldownInfo: a table containing information about the cooldown time
@unitCooldows: list of cooldowns of the unit
@allUnitsCooldowns: a list of all players and their cooldowns
===================================================================================================================================

function MyAddonObject.OnUnitNewCooldown(unitId, spellId, cooldownInfo, unitCooldows, allUnitsCooldowns)
    --minValue, maxValue, currentValue is the same as startTime, expirationTime, GetTime()
    local isReady, timeLeft, charges, normalizedPercent, minValue, maxValue, currentValue, cooldownDuration = openRaidLib.GetCooldownStatusFromCooldownInfo(cooldownInfo)
    local statusbar = CreateFrame("statusbar", "MyStatusBar", UIParent)
    statusbar:SetMinMaxValues(minValue, maxValue)
    statusbar:SetValue(currentValue)
    --cooldown frame
    local cooldownFrame = CreateFrame("cooldown", "MyCooldownFrame", UIParent)
    local startTime = minValue
    CooldownFrame_Set(cooldownFrame, startTime, cooldownDuration, timeLeft > 0)
    --or
    cooldownFrame:SetCooldown(startTime, cooldownDuration)
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "CooldownAdded", "OnUnitNewCooldown")

===================================================================================================================================
"CooldownRemoved": triggered when an unit lost a cooldown spell
@unitId: which unit got the update
@spellId: id of the cooldown spell
@unitCooldows: list of cooldowns of the unit
@allUnitsCooldowns: a list of all players and their cooldowns
===================================================================================================================================

function MyAddonObject.OnUnitLostCooldown(unitId, spellId, unitCooldows, allUnitsCooldowns)
    --the unit lost a cooldown
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "CooldownRemoved", "OnUnitLostCooldown")

===================================================================================================================================
"CooldownListWipe": when the list of cooldowns get a wipe, usually when the player leave the group
===================================================================================================================================

function MyAddonObject.OnCooldownListWipe(allUnitsCooldowns)
    --print("is nil:", next(allUnitsCooldowns))
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "CooldownListWipe", "OnCooldownListWipe")

Note: right after the wipe, player cooldowns get an update, so a callback "CooldownListUpdate" is triggered right after this event (on the same tick).



===================================================================================================================================
"GearUpdate": when received an update from a player with all information about the gear
===================================================================================================================================

function MyAddonObject.OnGearUpdate(unitId, unitGear, allUnitsGear)
    local itemLevelNumber = unitGear.ilevel
    local durabilityNumber = unitGear.durability
    --hasWeaponEnchant is 1 have enchant or 0 is don't
    local hasWeaponEnchantNumber = unitGear.weaponEnchant
    local noEnchantTable = unitGear.noEnchants
    local noGemsTable = unitGear.noGems

    for index, slotIdWithoutEnchant in ipairs(noEnchantTable) do
    end

    for index, slotIdWithEmptyGemSocket in ipairs(noGemsTable) do
    end
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "GearUpdate", "OnGearUpdate")

===================================================================================================================================
"GearDurabilityUpdate": when the gear durability of a player in the group changes
===================================================================================================================================

function MyAddonObject.OnGearDurabilityUpdate(unitId, durability, unitGear, allUnitsGear)
    --print(UnitName(unitId) .. " durability is now " .. durability)
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "GearDurabilityUpdate", "OnGearDurabilityUpdate")

===================================================================================================================================
"GearListWipe": when the list of gear get a wipe, usually when the player leave the group
===================================================================================================================================

function MyAddonObject.OnGearListWiped(allUnitsGear)
    --print("is nil:", next(allUnitsGear))
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "GearListWipe", "OnGearListWiped")

Note: right after the wipe, player gear information get an update, so a callback "GearUpdate" is triggered right after this event (on the same tick).




===================================================================================================================================
"UnitInfoUpdate": a unit in the group has been updated
===================================================================================================================================

function MyAddonObject.OnUnitUpdate(unitId, unitInfo, allUnitsInfo)
    for unitName, unitInfo in pairs(allUnitsInfo) do
        local specId = unitInfo.specId
        local specName = unitInfo.specName
        local role = unitInfo.role
        local renown = unitInfo.renown
        local covenantId = unitInfo.covenantId
        local talents = unitInfo.talents
        local pvpTalents = unitInfo.pvpTalents
        local conduits = unitInfo.conduits
        local class = unitInfo.class = string class eng name 'ROGUE'
        local classId = unitInfo.classId = number
        local className = unitInfo.className
        local unitName = unitInfo.name = string name without realm
        local unitNameFull = unitInfo.nameFull = string name with realm 'unitName-ServerName'
    end
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "UnitInfoUpdate", "OnUnitUpdate")

===================================================================================================================================
"UnitInfoWipe": when the unit info got wipped, usually when the player leave the group
===================================================================================================================================

function MyAddonObject.OnUnitInfoWipe()
    --all unit info got wiped
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "UnitInfoWipe", "OnUnitInfoWipe")

Note: a "UnitUpdate" callback is triggered right after this event to notify the player info is updated.

===================================================================================================================================
"TalentUpdate": when a unit changed a talent
===================================================================================================================================

function MyAddonObject.OnTalentUpdate(unitId, talents, unitInfo, allUnitsInfo)
    for i = 1, 7 do
        local talentId = talents[i]
        local talentID, talentName, texture, selected, available = GetTalentInfoByID(talentId)
        print(talentName)
    end
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "TalentUpdate", "OnTalentUpdate")

===================================================================================================================================
"PvPTalentUpdate": when an unit changed a pvp talent
===================================================================================================================================

function MyAddonObject.OnPvPTalentUpdate(unitId, pvpTalents, unitInfo, allUnitsInfo)
    for i = 1, 3 do
        local talentId = pvpTalents[i]
        local talentID, talentName, icon, selected, available, spellID, unlocked, row, column, known, grantedByAura = GetPvpTalentInfoByID(talentId)
        print(talentName)
    end
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "PvPTalentUpdate", "OnPvPTalentUpdate")

===================================================================================================================================
"UnitDeath": when an unit died
===================================================================================================================================

function MyAddonObject.OnUnitDeath(unitId)
    print(UnitName(unitId) .. " died.")
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "UnitDeath", "OnUnitDeath")

===================================================================================================================================
"UnitAlive": when an unit revives
===================================================================================================================================

function MyAddonObject.OnUnitRess(unitId)
    print(UnitName(unitId) .. " is alive.")
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "UnitAlive", "OnUnitRess")

===================================================================================================================================
"KeystoneUpdate": triggered when the list of keystones got an update
===================================================================================================================================

function MyAddonObject.OnKeystoneUpdate(unitName, keystoneInfo, allKeystoneInfo)
    local mapName = C_ChallengeMode.GetMapUIInfo(keystoneInfo.mythicPlusMapID)
    print(unitName .. " has a " .. keystoneInfo.level .. " keystone for map " .. mapName  .. ".")
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "KeystoneUpdate", "OnKeystoneUpdate")

===================================================================================================================================
"KeystoneWipe": triggered after the call openRaidLib.WipeKeystoneData()
===================================================================================================================================

function MyAddonObject.OnKeystoneUpdate(allKeystoneInfo)
    print("no keystone data:", next(allKeystoneInfo) == nil)
end

--registering the callback:
openRaidLib.RegisterCallback(MyAddonObject, "KeystoneWipe", "OnKeystoneWipe")