ADD - calls app and sim cards

sky_phone/source/shared/sim_number.lua

@@ -0,0 +1,59 @@
+SkyPhoneSimNumber = {}
+
+function SkyPhoneSimNumber.Normalize(value, length, prefix)
+    if type(value) ~= "string" and type(value) ~= "number" then
+        return nil
+    end
+    local number = tostring(value):gsub("%D", "")
+    if #number ~= length or number:sub(1, #prefix) ~= prefix then
+        return nil
+    end
+    return number
+end
+
+function SkyPhoneSimNumber.FromEntropy(entropy, length, prefix)
+    if type(entropy) ~= "string" or entropy == "" then
+        return nil
+    end
+    local source = entropy:gsub("%D", "")
+    if source == "" then
+        return nil
+    end
+    local number = prefix
+    local index = 1
+    while #number < length do
+        number = number .. source:sub(index, index)
+        index = index + 1
+        if index > #source and #number < length then
+            index = 1
+        end
+    end
+    return number
+end
+
+function SkyPhoneSimNumber.Format(value, groups, length, prefix)
+    local number = SkyPhoneSimNumber.Normalize(value, length, prefix)
+    if not number then
+        return tostring(value or "")
+    end
+    local formatted = {}
+    local offset = 1
+    for _, group_length in ipairs(groups) do
+        formatted[#formatted + 1] = number:sub(offset, offset + group_length - 1)
+        offset = offset + group_length
+    end
+    if offset <= #number then
+        formatted[#formatted + 1] = number:sub(offset)
+    end
+    return table.concat(formatted, " ")
+end
+
+function SkyPhoneSimNumber.Reserve(entropy, accept, length, prefix)
+    for _ = 1, 20 do
+        local candidate = SkyPhoneSimNumber.FromEntropy(entropy(), length, prefix)
+        if candidate and accept(candidate) then
+            return candidate
+        end
+    end
+    return nil
+end